ABCDEFGHIJKLMNOPQRSTUVWXYZ
p+ (1)
 Atomic data: Phosphorus
 
p+2 (1)
 Data2: Phosphorus
 
p+3 (1)
 Data2: Phosphorus
 
p+5 (1)
 Data2: Phosphorus
 
p0 (5)
 Data2: Carbon
 Data2: Lead
 Data2: Phosphorus
 Data2: Silicon
 Data2: Tin
 
p1 (17)
 Atomic data: Aluminium
 Atomic data: Boron
 Atomic data: Carbon
 Atomic data: Gallium
 Atomic data: Germanium
 Atomic data: Indium
 Atomic data: Lead
 Atomic data: Silicon
 Atomic data: Thallium
 Atomic data: Tin
 Data2: Aluminium
 Data2: Boron
 Data2: Gallium
 Data2: Indium
 Data2: Lawrencium
 Data2: Thallium
 Data2: Ununtrium
 
p2 (21)
 Atomic data: Antimony
 Atomic data: Arsenic
 Atomic data: Bismuth
 Atomic data: Carbon
 Atomic data: Germanium
 Atomic data: Lead
 Atomic data: Nitrogen
 Atomic data: Phosphorus
 Atomic data: Silicon
 Atomic data: Tin
 Data2: Carbon
 Data2: Germanium
 Data2: Lead
 Data2: Oxygen
 Data2: Polonium
 Data2: Selenium
 Data2: Silicon
 Data2: Sulfur
 Data2: Tellurium
 Data2: Tin
 Data2: Ununquadium
 
p2i4 (1)
 Reactions: Phosphorus
 
p3 (16)
 Atomic data: Antimony
 Atomic data: Arsenic
 Atomic data: Bismuth
 Atomic data: Nitrogen
 Atomic data: Oxygen
 Atomic data: Phosphorus
 Atomic data: Polonium
 Atomic data: Selenium
 Atomic data: Sulfur
 Atomic data: Tellurium
 Data2: Antimony
 Data2: Arsenic
 Data2: Bismuth
 Data2: Nitrogen
 Data2: Phosphorus
 Data2: Ununpentium
 
p4 (18)
 Allotrope: Phosphorus
 Atomic data: Astatine
 Atomic data: Bromine
 Atomic data: Chlorine
 Atomic data: Fluorine
 Atomic data: Iodine
 Atomic data: Oxygen
 Atomic data: Polonium
 Atomic data: Selenium
 Atomic data: Sulfur
 Atomic data: Tellurium
 Data2: Oxygen
 Data2: Polonium
 Data2: Selenium
 Data2: Sulfur
 Data2: Tellurium
 Data2: Ununhexium
 Reactions: Phosphorus
 
p4o10 (1)
 Reactions: Phosphorus
 
p4o6 (1)
 Reactions: Phosphorus
 
p5 (16)
 Atomic data: Argon
 Atomic data: Astatine
 Atomic data: Bromine
 Atomic data: Chlorine
 Atomic data: Fluorine
 Atomic data: Iodine
 Atomic data: Krypton
 Atomic data: Neon
 Atomic data: Radon
 Atomic data: Xenon
 Data2: Astatine
 Data2: Bromine
 Data2: Chlorine
 Data2: Fluorine
 Data2: Iodine
 Data2: Ununseptium
 
p6 (17)
 Atomic data: Argon
 Atomic data: Caesium
 Atomic data: Francium
 Atomic data: Krypton
 Atomic data: Neon
 Atomic data: Potassium
 Atomic data: Radon
 Atomic data: Rubidium
 Atomic data: Sodium
 Atomic data: Xenon
 Data2: Argon
 Data2: Krypton
 Data2: Neon
 Data2: Radon
 Data2: Ununoctium
 Data2: Xenon
 Document: Understanding Electron Configuration Tables
 
pa (101)
 Atomic data: Protactinium
 Biography: Joseph Priestley
 Country: Democratic Republic of Congo
 Data1: Protactinium
 Data2: Aluminium
 Data2: Americium
 Data2: Antimony
 Data2: Argon
 Data2: Arsenic
 Data2: Astatine
 Data2: Barium
 Data2: Beryllium
 Data2: Bismuth
 Data2: Boron
 Data2: Bromine
 Data2: Cadmium
 Data2: Caesium
 Data2: Calcium
 Data2: Carbon
 Data2: Cerium
 Data2: Chlorine
 Data2: Chromium
 Data2: Cobalt
 Data2: Copper
 Data2: Curium
 Data2: Dysprosium
 Data2: Erbium
 Data2: Europium
 Data2: Fluorine
 Data2: Francium
 Data2: Gadolinium
 Data2: Gallium
 Data2: Germanium
 Data2: Gold
 Data2: Hafnium
 Data2: Helium
 Data2: Holmium
 Data2: Hydrogen
 Data2: Indium
 Data2: Iodine
 Data2: Iridium
 Data2: Iron
 Data2: Krypton
 Data2: Lanthanum
 Data2: Lead
 Data2: Lithium
 Data2: Lutetium
 Data2: Magnesium
 Data2: Manganese
 Data2: Mercury
 Data2: Molybdenum
 Data2: Neodymium
 Data2: Neon
 Data2: Neptunium
 Data2: Nickel
 Data2: Niobium
 Data2: Nitrogen
 Data2: Osmium
 Data2: Oxygen
 Data2: Palladium
 Data2: Phosphorus
 Data2: Platinum
 Data2: Plutonium
 Data2: Polonium
 Data2: Praseodymium
 Data2: Radium
 Data2: Radon
 Data2: Rhenium
 Data2: Rhodium
 Data2: Rubidium
 Data2: Ruthenium
 Data2: Samarium
 Data2: Scandium
 Data2: Selenium
 Data2: Silicon
 Data2: Silver
 Data2: Sodium
 Data2: Strontium
 Data2: Sulfur
 Data2: Tantalum
 Data2: Technetium
 Data2: Tellurium
 Data2: Terbium
 Data2: Thallium
 Data2: Thorium
 Data2: Thulium
 Data2: Tin
 Data2: Titanium
 Data2: Tungsten
 Data2: Uranium
 Data2: Vanadium
 Data2: Xenon
 Data2: Ytterbium
 Data2: Yttrium
 Data2: Zinc
 Data2: Zirconium
 Equation: Total gas pressure as sum of partial pressures
 Isotope: Neptunium
 Isotope: Protactinium
 Production: Protactinium
 Spectrum: Protactinium
 
pa+ (1)
 Atomic data: Protactinium
 
pa+3 (1)
 Data2: Protactinium
 
pa+4 (1)
 Data2: Protactinium
 
pa+5 (1)
 Data2: Protactinium
 
pa2o5 (1)
 Data1: Protactinium
 
pacemakers (3)
 Compounds: Iodine
 Compounds: Lithium
 Data1: Osmium
 
pacific (46)
 Data1: Aluminium
 Data1: Arsenic
 Data1: Barium
 Data1: Beryllium
 Data1: Bismuth
 Data1: Cadmium
 Data1: Carbon
 Data1: Cerium
 Data1: Chromium
 Data1: Cobalt
 Data1: Copper
 Data1: Dysprosium
 Data1: Erbium
 Data1: Europium
 Data1: Fluorine
 Data1: Gadolinium
 Data1: Germanium
 Data1: Holmium
 Data1: Iodine
 Data1: Iron
 Data1: Lanthanum
 Data1: Lead
 Data1: Lutetium
 Data1: Manganese
 Data1: Mercury
 Data1: Neodymium
 Data1: Nickel
 Data1: Nitrogen
 Data1: Palladium
 Data1: Phosphorus
 Data1: Platinum
 Data1: Praseodymium
 Data1: Samarium
 Data1: Scandium
 Data1: Selenium
 Data1: Silicon
 Data1: Silver
 Data1: Strontium
 Data1: Tellurium
 Data1: Terbium
 Data1: Thulium
 Data1: Tin
 Data1: Vanadium
 Data1: Ytterbium
 Data1: Zinc
 Production: Sulfur
 
package (1)
 Data1: Europium
 
packaging (2)
 Compounds: Aluminium
 Data1: Aluminium
 
packed (52)
 Data2: Actinium
 Data2: Aluminium
 Data2: Americium
 Data2: Argon
 Data2: Berkelium
 Data2: Beryllium
 Data2: Cadmium
 Data2: Calcium
 Data2: Californium
 Data2: Carbon
 Data2: Cerium
 Data2: Cobalt
 Data2: Copper
 Data2: Curium
 Data2: Dysprosium
 Data2: Erbium
 Data2: Gadolinium
 Data2: Germanium
 Data2: Gold
 Data2: Hafnium
 Data2: Hydrogen
 Data2: Iridium
 Data2: Krypton
 Data2: Lanthanum
 Data2: Lead
 Data2: Lutetium
 Data2: Magnesium
 Data2: Neodymium
 Data2: Neon
 Data2: Nickel
 Data2: Nitrogen
 Data2: Osmium
 Data2: Palladium
 Data2: Platinum
 Data2: Praseodymium
 Data2: Rhenium
 Data2: Rhodium
 Data2: Ruthenium
 Data2: Scandium
 Data2: Silver
 Data2: Strontium
 Data2: Technetium
 Data2: Terbium
 Data2: Thallium
 Data2: Thorium
 Data2: Thulium
 Data2: Titanium
 Data2: Xenon
 Data2: Ytterbium
 Data2: Yttrium
 Data2: Zinc
 Data2: Zirconium
 
packet (3)
 Compounds: Sodium
 Glossary:
 Glossary: Alpha Decay
 
packing (1)
 Production: Technetium
 
packs (1)
 Data1: Radon
 
padua (1)
 Biography: Julius Caesar Scaliger
 
page (1)
 On This Day... 5 September
 
pagers (1)
 Compounds: Tantalum
 
pages (2)
 Biography: Julius Caesar Scaliger
 Glossary: Abundance
 
paid (1)
 Production: Uranium
 
pain (4)
 Compounds: Nitrogen
 Compounds: Samarium
 Compounds: Zinc
 Isotope: Strontium
 
painful (2)
 Biography: Robert Wilhelm Bunsen
 Data1: Bromine
 
pains (1)
 Compounds: Magnesium
 
paint (12)
 Compounds: Antimony
 Compounds: Calcium
 Compounds: Copper
 Data1: Aluminium
 Data1: Carbon
 Data1: Chromium
 Data1: Lead
 Data1: Mercury
 Data1: Radium
 Data1: Strontium
 Data1: Titanium
 Data1: Xenon
 
paintbrush (1)
 Data1: Radium
 
painted (1)
 Data1: Radium
 
painters (1)
 Data1: Radium
 
painting (3)
 Compounds: Cobalt
 Compounds: Copper
 Production: Arsenic
 
paintings (2)
 Biography: Sir Humphry Davy
 Compounds: Copper
 
paints (15)
 Compounds: Calcium
 Compounds: Lead
 Compounds: Sodium
 Compounds: Titanium
 Data1: Aluminium
 Data1: Antimony
 Data1: Chlorine
 Data1: Chromium
 Data1: Europium
 Data1: Lead
 Data1: Manganese
 Data1: Molybdenum
 Data1: Radium
 Data1: Titanium
 Data1: Zinc
 
pair (1)
 Biography: Dmitriy Ivanovich Mendeleyev
 
pairs (1)
 Glossary: Alloy
 
pakistan (1)
 Country: Pakistan
 
pal (1)
 Data1: Tellurium
 
paladij (1)
 Names: Palladium
 
paladio (1)
 Names: Palladium
 
palate (1)
 Glossary: Teratogenic
 
pale (8)
 Allotrope: Oxygen
 Data1: Fluorine
 Data1: Oxygen
 Data1: Zinc
 Reactions: Europium
 Reactions: Potassium
 Reactions: Terbium
 Reactions: Thulium
 
paler (1)
 Data1: Arsenic
 
palermo (2)
 Biography: Emilio Gino Segre
 Data1: Technetium
 
palladio (1)
 Names: Palladium
 
palladium (26)
 Atomic data: Palladium
 Biography: William Hyde Wollaston
 Compounds: Palladium
 Country: Canada
 Country: Russia
 Country: South Africa
 Country: United States of America
 Country: Zimbabwe
 Data1: Darmstadtium
 Data1: Gold
 Data1: Osmium
 Data1: Palladium
 Data1: Rhodium
 Data1: Ruthenium
 Data2: Palladium
 Document: Abundance of the Elements in the Solar System
 Isotope: Palladium
 MAC data: Palladium
 Names: Palladium
 Production: Nickel
 Production: Palladium
 Production: Platinum
 Production: Rhodium
 Reactions: Darmstadtium
 Reactions: Palladium
 Spectrum: Palladium
 
pallas (3)
 Biography: William Hyde Wollaston
 Data1: Chromium
 Data1: Palladium
 
palmolive (1)
 Compounds: Sodium
 
pan (1)
 Country: Peru
 
panama (1)
 Data1: Platinum
 
panchromium (1)
 Data1: Vanadium
 
pancuronium (1)
 Compounds: Sodium
 
panel (2)
 Compounds: Indium
 Data1: Boron
 
panels (3)
 Compounds: Indium
 Data1: Gallium
 Data1: Tellurium
 
paneth (1)
 On This Day... 31 August
 
panormium (1)
 Data1: Technetium
 
panormus (1)
 Data1: Technetium
 
pans (1)
 Data1: Aluminium
 
paper (26)
 Biography: Charles Hatchett
 Biography: Ida Eva Tacke Noddack
 Biography: John Dalton
 Biography: Louis Jacques Thenard
 Biography: Michael Faraday
 Biography: Sir Humphry Davy
 Biography: William Hyde Wollaston
 Compounds: Calcium
 Compounds: Lead
 Compounds: Magnesium
 Compounds: Sodium
 Compounds: Sulfur
 Data1: Chlorine
 Data1: Selenium
 Data1: Silver
 Data1: Sulfur
 Data1: Titanium
 Data1: Ununhexium
 Data1: Ununoctium
 Document: The Halogens (Group 17)
 Glossary: Halogens
 Glossary: Shear Modulus
 On This Day... 21 June
 On This Day... 4 December
 On This Day... 5 December
 On This Day... 7 February
 
papers (4)
 Biography: Enrico Fermi
 Biography: Henry Cavendish
 Biography: John Dalton
 Compounds: Titanium
 
papin (1)
 On This Day... 22 August
 
papua (1)
 Country: Papua New Guinea
 
par (1)
 Biography: Julius Caesar Scaliger
 
paracelsus (1)
 Data1: Hydrogen
 
paradoxes (1)
 Biography: Julius Caesar Scaliger
 
paraguay (1)
 Country: Paraguay
 
paraldehyde (1)
 On This Day... 25 June
 
paralysis (1)
 Data1: Barium
 
paramagnetic (14)
 Compounds: Dysprosium
 Compounds: Holmium
 Data1: Gadolinium
 Data1: Manganese
 Data2: Aluminium
 Data2: Calcium
 Data2: Magnesium
 Data2: Oxygen
 Data2: Platinum
 Data2: Sodium
 Data2: Strontium
 Data2: Uranium
 Document: The Transition Metals (Groups 3 to 12)
 Glossary: Magnetic Ordering
 
paramagnetism (1)
 Glossary: Magnetic Ordering
 
paramagnets (1)
 Glossary: Magnetic Ordering
 
parent (8)
 Biography: Frederick Soddy
 Country: United Kingdom
 Data1: Protactinium
 Glossary: Alpha Decay
 Glossary: Double Beta Decay
 Glossary: Electron Capture
 Isotope: Magnesium
 Production: Technetium
 
parents (1)
 Biography: Irene Joliot-Curie
 
paris (22)
 Biography: Andre Louis Debierne
 Biography: Antoine-Laurent de Lavoisier
 Biography: Ferdinand Frederic Henri Moissan
 Biography: Friedrich Stromeyer
 Biography: Irene Joliot-Curie
 Biography: Jean Charles Galissard de Marignac
 Biography: Joseph Louis Gay-Lussac
 Biography: Louis Jacques Thenard
 Biography: Louis Nicolas Vauquelin
 Biography: Pierre Curie
 Biography: Pierre Jules César Janssen
 Biography: Robert Wilhelm Bunsen
 Data1: Calcium
 Data1: Dysprosium
 Data1: Francium
 Data1: Iridium
 Data1: Lutetium
 Data1: Samarium
 Data1: Uranium
 On This Day... 27 January
 On This Day... 3 July
 Production: Arsenic
 
parish (1)
 Data1: Titanium
 
parkes (1)
 Production: Silver
 
parkinson (1)
 Data1: Manganese
 
parnasse (1)
 Biography: Julius Caesar Scaliger
 
parsons (1)
 On This Day... 23 March
 
part (41)
 Biography: Joseph Louis Gay-Lussac
 Biography: Julius Caesar Scaliger
 Compounds: Nitrogen
 Compounds: Silicon
 Compounds: Zinc
 Country: Chile
 Country: Democratic Republic of Congo
 Country: Outer space
 Country: United States of America
 Data1: Antimony
 Data1: Copper
 Data1: Dysprosium
 Data1: Gold
 Data1: Iodine
 Data1: Iron
 Data1: Neon
 Data1: Protactinium
 Data1: Radium
 Data1: Ruthenium
 Data1: Seaborgium
 Data1: Technetium
 Data1: Xenon
 Document: The Noble Gases (Group 18)
 Document: Understanding Electron Configuration Tables
 Glossary: Anti-Neutrino
 Glossary: Aqua regia
 Glossary: Beta Particle
 Glossary: Doubly Magic
 Glossary: Gamma Ray
 Glossary: Transition Metals
 Isotope: Carbon
 Isotope: Hassium
 Production: Helium
 Production: Lithium
 Production: Neon
 Production: Nitrogen
 Production: Oxygen
 Production: Polonium
 Production: Protactinium
 Production: Technetium
 Production: Xenon
 
partial (3)
 Compounds: Hydrogen
 Equation: Henry's Law
 Equation: Total gas pressure as sum of partial pressures
 
partially (7)
 Biography: Robert Wilhelm Bunsen
 Compounds: Erbium
 Data1: Lanthanum
 Glossary: Magnetic Ordering
 Glossary: Plasma
 Glossary: X-Rays
 Production: Phosphorus
 
participate (4)
 Biography: Pierre Curie
 Compounds: Hydrogen
 Document: The Noble Gases (Group 18)
 Glossary: Noble Gasses (inert gasses)
 
participation (2)
 Biography: Albert Ghiorso
 Data1: Seaborgium
 
particle (30)
 Biography: Andre Louis Debierne
 Biography: Edwin Mattison McMillan
 Compounds: Molybdenum
 Compounds: Strontium
 Country: Outer space
 Data1: Curium
 Data1: Dubnium
 Data1: Helium
 Data1: Lawrencium
 Data1: Plutonium
 Data1: Rubidium
 Document: The Actinoid Series
 Glossary:
 Glossary: Abundance
 Glossary: Actinides
 Glossary: Actinoids
 Glossary: Alpha Decay
 Glossary: Antimatter
 Glossary: Atomic Charge
 Glossary: Baryon
 Glossary: Beta Particle
 Glossary: Electron Volt
 Glossary: Half Life
 Glossary: Isometric Transition
 Glossary: Neutrino
 Glossary: Positron
 Glossary: Positron Emission (Beta+ Decay)
 Glossary: X-Rays
 Isotope: Helium
 On This Day... 18 October
 
particles (56)
 Biography: Enrico Fermi
 Biography: John Dalton
 Biography: John William Strutt Rayleigh
 Compounds: Americium
 Compounds: Barium
 Compounds: Boron
 Compounds: Calcium
 Compounds: Samarium
 Compounds: Sodium
 Compounds: Strontium
 Data1: Astatine
 Data1: Berkelium
 Data1: Californium
 Data1: Curium
 Data1: Darmstadtium
 Data1: Fermium
 Data1: Francium
 Data1: Hafnium
 Data1: Helium
 Data1: Mendelevium
 Data1: Polonium
 Data1: Ununbium
 Data1: Ununtrium
 Equation: Ideal gas law
 Equation: Van der Waals equation
 Glossary: Alpha Decay
 Glossary: Anti-Neutrino
 Glossary: Antimatter
 Glossary: Antiproton
 Glossary: Avogadro's Constant
 Glossary: Baryon
 Glossary: Beta Particle
 Glossary: Double Electron Capture
 Glossary: Electron
 Glossary: Gamma Ray
 Glossary: Gas
 Glossary: Half Life
 Glossary: Liquid
 Glossary: Mole
 Glossary: Neutron
 Glossary: Proton
 Glossary: Pyrophoric
 Glossary: Quantum Mechanics
 Glossary: Radioactivity
 Glossary: Temperature
 Isotope: Helium
 Isotope: Polonium
 On This Day... 10 January
 On This Day... 9 August
 Production: Astatine
 Production: Berkelium
 Production: Californium
 Production: Curium
 Production: Helium
 Production: Mendelevium
 Production: Technetium
 
particular (15)
 Biography: Jöns Jacob Berzelius
 Biography: Michael Faraday
 Biography: Pierre Jules César Janssen
 Compounds: Calcium
 Compounds: Lithium
 Compounds: Sulfur
 Data1: Phosphorus
 Data1: Technetium
 Glossary: Absorption Spectrum
 Glossary: Alloy
 Glossary: Half Life
 Glossary: Island of Stability
 Glossary: Magnetic Ordering
 Isotope: Iodine
 On This Day... 31 December
 
particularly (26)
 Biography: Frederick Soddy
 Biography: John William Strutt Rayleigh
 Biography: Robert Wilhelm Bunsen
 Compounds: Americium
 Compounds: Cobalt
 Compounds: Iodine
 Compounds: Nitrogen
 Compounds: Sodium
 Compounds: Technetium
 Compounds: Titanium
 Data1: Aluminium
 Data1: Gold
 Data1: Lithium
 Data1: Nitrogen
 Data1: Uranium
 Document: The Halogens (Group 17)
 Glossary: Acid
 Glossary: Gamma Ray
 Glossary: Island of Stability
 Isotope: Plutonium
 On This Day... 28 June
 On This Day... 3 December
 On This Day... 30 January
 Production: Lanthanum
 Production: Lithium
 Production: Radon
 
particulate (2)
 Compounds: Aluminium
 Compounds: Chromium
 
parties (1)
 Biography: Antoine-Laurent de Lavoisier
 
parting (1)
 Production: Gold
 
partington (1)
 On This Day... 20 June
 
partition (2)
 Data1: Polonium
 Production: Yttrium
 
partitioned (1)
 Data1: Terbium
 
partly (7)
 Biography: Jöns Jacob Berzelius
 Biography: Pierre Curie
 Compounds: Sodium
 Data1: Lead
 Data1: Phosphorus
 Glossary: Electron Capture
 Production: Gold
 
partnership (1)
 Biography: Lise Meitner
 
parts (34)
 Biography: Frederick Soddy
 Biography: Jöns Jacob Berzelius
 Compounds: Beryllium
 Country: Democratic Republic of Congo
 Country: Oceans / Seas
 Country: Outer space
 Country: United Kingdom
 Data1: Beryllium
 Data1: Chlorine
 Data1: Chromium
 Data1: Cobalt
 Data1: Copper
 Data1: Fluorine
 Data1: Helium
 Data1: Lithium
 Data1: Magnesium
 Data1: Radium
 Data1: Rhenium
 Data1: Ruthenium
 Data1: Tantalum
 Data1: Technetium
 Data1: Xenon
 Glossary: Aqua regia
 Production: Europium
 Production: Fluorine
 Production: Gold
 Production: Helium
 Production: Lead
 Production: Lithium
 Production: Mercury
 Production: Promethium
 Production: Sulfur
 Production: Thorium
 Production: Uranium
 
party (1)
 Data1: Gold
 
pascal (1)
 Glossary: Young's Modulus
 
pascua (1)
 Production: Gold
 
pass (5)
 Data1: Europium
 Data1: Neodymium
 Glossary: Neutrino
 Isotope: Ytterbium
 Production: Lanthanum
 
passage (3)
 Biography: Robert Wilhelm Bunsen
 Compounds: Molybdenum
 Glossary: Electrochemical Equivalent
 
passed (6)
 Biography: Emilio Gino Segre
 Biography: Julius Caesar Scaliger
 Biography: Pierre Curie
 Data1: Plutonium
 Production: Iodine
 Production: Lead
 
passes (3)
 Glossary: Electron Volt
 Glossary: Emission Spectrum
 On This Day... 17 December
 
passing (6)
 Biography: Pierre Curie
 Data1: Hafnium
 Data1: Lithium
 Glossary: Speed of Sound
 On This Day... 24 July
 Production: Zinc
 
passion (1)
 Biography: Antoine-Laurent de Lavoisier
 
passivates (1)
 Reactions: Iron
 
past (2)
 Isotope: Beryllium
 Reactions: Lead
 
pastes (1)
 Data1: Antimony
 
pasteur (1)
 On This Day... 27 December
 
pasteurization (1)
 On This Day... 27 December
 
pastor (2)
 Biography: Gottfried Münzenberg
 Biography: Joseph Priestley
 
patent (5)
 Biography: Sir Humphry Davy
 On This Day... 17 September
 On This Day... 3 August
 On This Day... 7 December
 On This Day... 7 July
 
patented (7)
 Biography: William Hyde Wollaston
 Compounds: Oxygen
 Compounds: Sodium
 Data1: Manganese
 Data1: Zinc
 On This Day... 16 February
 On This Day... 30 December
 
patents (1)
 Data1: Manganese
 
pathological (1)
 Compounds: Iodine
 
pathologies (2)
 Data1: Radon
 Isotope: Iodine
 
patient (4)
 Compounds: Copper
 Compounds: Nitrogen
 Compounds: Sodium
 Glossary: Gamma Ray
 
patiently (1)
 Biography: Robert Wilhelm Bunsen
 
patients (5)
 Compounds: Arsenic
 Compounds: Lanthanum
 Compounds: Potassium
 Data1: Plutonium
 Data1: Titanium
 
patio (2)
 Country: Peru
 Country: Spain
 
patronite (2)
 Data1: Vanadium
 Production: Vanadium
 
pattern (3)
 Allotrope: Carbon
 Glossary: Magnetic Ordering
 Glossary: Periodic Table
 
patterns (1)
 Data1: Lead
 
pattison (1)
 Biography: Julius Caesar Scaliger
 
paul (19)
 Biography: Irene Joliot-Curie
 Biography: Paul Emile Lecoq de Boisbaudran
 Data1: Dysprosium
 Data1: Europium
 Data1: Gadolinium
 Data1: Gallium
 Data1: Samarium
 Data1: Technetium
 On This Day... 10 April
 On This Day... 17 April
 On This Day... 18 April
 On This Day... 19 July
 On This Day... 19 March
 On This Day... 21 March
 On This Day... 23 January
 On This Day... 3 December
 On This Day... 5 November
 On This Day... 7 September
 On This Day... 8 August
 
pauli (1)
 On This Day... 25 April
 
pauling (96)
 Data2: Actinium
 Data2: Aluminium
 Data2: Americium
 Data2: Antimony
 Data2: Arsenic
 Data2: Astatine
 Data2: Barium
 Data2: Berkelium
 Data2: Beryllium
 Data2: Bismuth
 Data2: Boron
 Data2: Bromine
 Data2: Cadmium
 Data2: Caesium
 Data2: Calcium
 Data2: Californium
 Data2: Carbon
 Data2: Cerium
 Data2: Chlorine
 Data2: Chromium
 Data2: Cobalt
 Data2: Copper
 Data2: Curium
 Data2: Dysprosium
 Data2: Erbium
 Data2: Europium
 Data2: Fluorine
 Data2: Francium
 Data2: Gadolinium
 Data2: Gallium
 Data2: Germanium
 Data2: Gold
 Data2: Hafnium
 Data2: Holmium
 Data2: Hydrogen
 Data2: Indium
 Data2: Iodine
 Data2: Iron
 Data2: Lanthanum
 Data2: Lawrencium
 Data2: Lead
 Data2: Lithium
 Data2: Lutetium
 Data2: Magnesium
 Data2: Manganese
 Data2: Mercury
 Data2: Molybdenum
 Data2: Neodymium
 Data2: Neptunium
 Data2: Nickel
 Data2: Niobium
 Data2: Nitrogen
 Data2: Nobelium
 Data2: Osmium
 Data2: Oxygen
 Data2: Palladium
 Data2: Phosphorus
 Data2: Platinum
 Data2: Plutonium
 Data2: Polonium
 Data2: Potassium
 Data2: Praseodymium
 Data2: Promethium
 Data2: Protactinium
 Data2: Radium
 Data2: Rhenium
 Data2: Rhodium
 Data2: Rubidium
 Data2: Ruthenium
 Data2: Samarium
 Data2: Scandium
 Data2: Selenium
 Data2: Silicon
 Data2: Silver
 Data2: Sodium
 Data2: Sulfur
 Data2: Tantalum
 Data2: Technetium
 Data2: Tellurium
 Data2: Terbium
 Data2: Thallium
 Data2: Thorium
 Data2: Thulium
 Data2: Tin
 Data2: Titanium
 Data2: Tungsten
 Data2: Uranium
 Data2: Vanadium
 Data2: Xenon
 Data2: Ytterbium
 Data2: Yttrium
 Data2: Zinc
 Data2: Zirconium
 Glossary: Electronegativity
 Glossary: The Pauling Scale
 On This Day... 28 February
 
paulze (2)
 Biography: Antoine-Laurent de Lavoisier
 On This Day... 20 January
 
paved (1)
 Biography: Robert Wilhelm Bunsen
 
pavel (1)
 Biography: Ida Eva Tacke Noddack
 
pavlovich (1)
 Biography: Dmitriy Ivanovich Mendeleyev
 
pay (1)
 Production: Gold
 
paying (1)
 Data1: Gold
 
payne (1)
 Biography: Michael Faraday
 
pb (17)
 Atomic data: Lead
 Compounds: Lead
 Data1: Hassium
 Data1: Lead
 Data1: Tin
 Data2: Lead
 Equation: Total gas pressure as sum of partial pressures
 Glossary: Doubly Magic
 Glossary: Element
 Glossary: Gamma Ray
 Glossary: Mass Number (A)
 Isotope: Bismuth
 Isotope: Lead
 Isotope: Polonium
 Isotope: Thallium
 Reactions: Lead
 Spectrum: Lead
 
pb+ (1)
 Atomic data: Lead
 
pb+2 (1)
 Data2: Lead
 
pb+4 (1)
 Data2: Lead
 
pb2+ (1)
 Reactions: Lead
 
pb3o4 (1)
 Reactions: Lead
 
pb4+ (1)
 Reactions: Lead
 
pb5 (3)
 Data1: Vanadium
 Production: Arsenic
 Production: Vanadium
 
pbcl2 (1)
 Reactions: Lead
 
pbco3 (1)
 Production: Lead
 
pbcro4 (1)
 Data1: Chromium
 
pbf2 (1)
 Reactions: Lead
 
pbh2 (1)
 Reactions: Lead
 
pbi2 (1)
 Compounds: Iodine
 
pbmoo4 (1)
 Production: Molybdenum
 
pbo (2)
 Compounds: Lead
 Reactions: Lead
 
pbo2 (1)
 Reactions: Lead
 
pbo32 (1)
 Reactions: Lead
 
pbr3 (1)
 Reactions: Phosphorus
 
pbs (4)
 Compounds: Lead
 Data1: Lead
 Data1: Sulfur
 Production: Lead
 
pbse (2)
 Compounds: Lead
 Compounds: Selenium
 
pbso4 (2)
 Production: Lead
 Reactions: Lead
 
pc (1)
 Equation: Total gas pressure as sum of partial pressures
 
pci (1)
 Production: Radon
 
pcl3 (1)
 Reactions: Phosphorus
 
pd (12)
 Atomic data: Palladium
 Country: South Africa
 Data1: Palladium
 Equation: Reaction quotient
 Isotope: Cadmium
 Isotope: Palladium
 Isotope: Rhodium
 Isotope: Silver
 Production: Platinum
 Production: Rhodium
 Reactions: Palladium
 Spectrum: Palladium
 
pd+ (1)
 Atomic data: Palladium
 
pd+2 (1)
 Data2: Palladium
 
pd+4 (1)
 Data2: Palladium
 
pd0 (1)
 Data2: Palladium
 
pd2+ (1)
 Reactions: Palladium
 
pdbr2 (1)
 Reactions: Palladium
 
pdbr42 (1)
 Reactions: Palladium
 
pdbr62 (1)
 Reactions: Palladium
 
pdcl2 (3)
 Compounds: Palladium
 Data1: Palladium
 Reactions: Palladium
 
pdcl42 (1)
 Reactions: Palladium
 
pdcl62 (1)
 Reactions: Palladium
 
pdf6 (1)
 Reactions: Palladium
 
pdms (1)
 Compounds: Silicon
 
pdo (1)
 Reactions: Palladium
 
pdo2 (1)
 Reactions: Palladium
 
pdo3 (1)
 Reactions: Palladium
 
peaceful (1)
 Biography: Robert Wilhelm Bunsen
 
peacetime (1)
 Country: United States of America
 
peak (3)
 Compounds: Sodium
 Country: Australia
 Country: United States of America
 
peaks (1)
 Isotope: Gadolinium
 
peasant (1)
 Biography: Louis Jacques Thenard
 
pectic (1)
 Glossary: Acid
 
peculiar (1)
 Allotrope: Oxygen
 
pedagogical (1)
 Biography: Dmitriy Ivanovich Mendeleyev
 
pedals (1)
 Data1: Germanium
 
pedersen (1)
 On This Day... 3 October
 
peer (3)
 Biography: Louis Jacques Thenard
 Data1: Ununpentium
 Data1: Ununtrium
 
pegged (1)
 Production: Magnesium
 
pegmatites (1)
 Data1: Rubidium
 
peligot (1)
 Data1: Uranium
 
pelletier (1)
 On This Day... 22 March
 
pellets (3)
 Compounds: Phosphorus
 Data1: Arsenic
 On This Day... 4 July
 
pelopium (1)
 Data1: Technetium
 
pen (6)
 Compounds: Iridium
 Compounds: Osmium
 Data1: Iridium
 Data1: Osmium
 Data1: Rhodium
 Data1: Ruthenium
 
pencil (2)
 Data1: Carbon
 Data1: Sodium
 
pencils (3)
 Allotrope: Carbon
 Country: United Kingdom
 Data1: Carbon
 
pendant (1)
 Data1: Copper
 
penetrating (2)
 Glossary: Gamma Ray
 Glossary: Radiation
 
penetration (2)
 Compounds: Silver
 Glossary: Brinell Hardness
 
peninsula (4)
 Biography: Dmitriy Ivanovich Mendeleyev
 Country: China
 Country: Russia
 Country: Ukraine
 
pennine (1)
 Production: Lead
 
pennsylvania (3)
 Data1: Radon
 On This Day... 27 August
 Production: Radon
 
penny (1)
 Glossary: Moh's Scale of Hardness
 
penta (1)
 Data1: Carbon
 
pentafluoride (2)
 Data2: Tungsten
 Reactions: Iodine
 
pentagonal (1)
 Allotrope: Carbon
 
pentagons (1)
 Allotrope: Carbon
 
pentahydrate (3)
 Compounds: Boron
 Compounds: Sodium
 Data1: Boron
 
pentamethylcyclopentadienyl (1)
 Compounds: Europium
 
pentium (1)
 Isotope: Hydrogen
 
pentlandite (4)
 Data1: Nickel
 Data1: Ruthenium
 Production: Nickel
 Production: Ruthenium
 
pentoxide (8)
 Compounds: Antimony
 Compounds: Tantalum
 Data1: Tantalum
 Data1: Vanadium
 Glossary: Allotrope
 On This Day... 11 March
 Reactions: Arsenic
 Reactions: Phosphorus
 
penzance (2)
 Biography: Sir Humphry Davy
 On This Day... 17 December
 
people (23)
 Biography: Dmitriy Ivanovich Mendeleyev
 Biography: Glenn Theodore Seaborg
 Biography: Joseph Louis Gay-Lussac
 Compounds: Samarium
 Compounds: Selenium
 Country: Colombia
 Country: Oceans / Seas
 Data1: Aluminium
 Data1: Arsenic
 Data1: Iodine
 Data1: Lead
 Data1: Manganese
 Data1: Niobium
 Data1: Phosphorus
 Data1: Plutonium
 Data1: Rhodium
 Data1: Sodium
 Data1: Yttrium
 Glossary: Magnetic Ordering
 Isotope: Potassium
 Production: Aluminium
 Production: Gold
 Production: Uranium
 
peoples (3)
 Country: Democratic People's Republic of Korea
 Data1: Copper
 Data1: Gold
 
pepper (2)
 Compounds: Sodium
 Data1: Chlorine
 
pepto (1)
 Compounds: Bismuth
 
perborate (3)
 Compounds: Boron
 Compounds: Sodium
 Data1: Boron
 
perceived (1)
 Glossary: Viscosity
 
percent (12)
 Allotrope: Carbon
 Data1: Aluminium
 Data1: Boron
 Data1: Iron
 Data1: Samarium
 Glossary: Abundance
 Isotope: Plutonium
 Production: Aluminium
 Production: Copper
 Production: Lanthanum
 Production: Nickel
 Production: Oxygen
 
percentage (1)
 Isotope: Plutonium
 
percentages (2)
 Glossary: Abundance
 Production: Lanthanum
 
perception (2)
 Biography: Pierre Jules César Janssen
 Biography: Sir Humphry Davy
 
perchlorate (1)
 Compounds: Lithium
 
perchlorates (1)
 Compounds: Lithium
 
percussion (2)
 Data1: Tellurium
 Data1: Zirconium
 
percy (1)
 On This Day... 21 April
 
perennials (1)
 Compounds: Phosphorus
 
perey (3)
 Biography: Marguerite Catherine Perey
 Data1: Francium
 On This Day... 19 October
 
perfect (5)
 Biography: Dmitriy Ivanovich Mendeleyev
 Biography: Jöns Jacob Berzelius
 Compounds: Chromium
 Data1: Tantalum
 Glossary: Ideal Gas
 
perfection (1)
 Biography: Jöns Jacob Berzelius
 
perfectly (1)
 Glossary: Poisson Ratio
 
performance (8)
 Biography: Louis Jacques Thenard
 Compounds: Beryllium
 Compounds: Fluorine
 Compounds: Silicon
 Data1: Chromium
 Data1: Indium
 Data1: Lithium
 Data1: Scandium
 
performed (9)
 Biography: Antoine-Laurent de Lavoisier
 Biography: Robert Wilhelm Bunsen
 Biography: William Hyde Wollaston
 Data1: Plutonium
 On This Day... 13 December
 On This Day... 14 December
 On This Day... 16 April
 On This Day... 20 November
 On This Day... 29 January
 
performing (1)
 Production: Gold
 
performs (1)
 Biography: Institute for Heavy Ion Research (GSI)
 
perhaps (5)
 Biography: Jöns Jacob Berzelius
 Biography: Louis Jacques Thenard
 Country: Oceans / Seas
 Data1: Plutonium
 Production: Gold
 
perimeter (1)
 Data1: Antimony
 
period (131)
 Biography: Frederick Soddy
 Biography: Irene Joliot-Curie
 Biography: John William Strutt Rayleigh
 Biography: Robert Wilhelm Bunsen
 Compounds: Copper
 Compounds: Silver
 Data1: Actinium
 Data1: Aluminium
 Data1: Americium
 Data1: Antimony
 Data1: Argon
 Data1: Arsenic
 Data1: Astatine
 Data1: Barium
 Data1: Berkelium
 Data1: Beryllium
 Data1: Bismuth
 Data1: Bohrium
 Data1: Boron
 Data1: Bromine
 Data1: Cadmium
 Data1: Caesium
 Data1: Calcium
 Data1: Californium
 Data1: Carbon
 Data1: Cerium
 Data1: Chlorine
 Data1: Chromium
 Data1: Cobalt
 Data1: Copper
 Data1: Curium
 Data1: Darmstadtium
 Data1: Dubnium
 Data1: Dysprosium
 Data1: Einsteinium
 Data1: Erbium
 Data1: Europium
 Data1: Fermium
 Data1: Fluorine
 Data1: Francium
 Data1: Gadolinium
 Data1: Gallium
 Data1: Germanium
 Data1: Gold
 Data1: Hafnium
 Data1: Hassium
 Data1: Helium
 Data1: Holmium
 Data1: Hydrogen
 Data1: Indium
 Data1: Iodine
 Data1: Iridium
 Data1: Iron
 Data1: Krypton
 Data1: Lanthanum
 Data1: Lawrencium
 Data1: Lead
 Data1: Lithium
 Data1: Lutetium
 Data1: Magnesium
 Data1: Manganese
 Data1: Meitnerium
 Data1: Mendelevium
 Data1: Mercury
 Data1: Molybdenum
 Data1: Neodymium
 Data1: Neon
 Data1: Neptunium
 Data1: Nickel
 Data1: Niobium
 Data1: Nitrogen
 Data1: Nobelium
 Data1: Osmium
 Data1: Oxygen
 Data1: Palladium
 Data1: Phosphorus
 Data1: Platinum
 Data1: Plutonium
 Data1: Polonium
 Data1: Potassium
 Data1: Praseodymium
 Data1: Promethium
 Data1: Protactinium
 Data1: Radium
 Data1: Radon
 Data1: Rhenium
 Data1: Rhodium
 Data1: Roentgenium
 Data1: Rubidium
 Data1: Ruthenium
 Data1: Rutherfordium
 Data1: Samarium
 Data1: Scandium
 Data1: Seaborgium
 Data1: Selenium
 Data1: Silicon
 Data1: Silver
 Data1: Sodium
 Data1: Strontium
 Data1: Sulfur
 Data1: Tantalum
 Data1: Technetium
 Data1: Tellurium
 Data1: Terbium
 Data1: Thallium
 Data1: Thorium
 Data1: Thulium
 Data1: Tin
 Data1: Titanium
 Data1: Tungsten
 Data1: Ununbium
 Data1: Ununhexium
 Data1: Ununoctium
 Data1: Ununpentium
 Data1: Ununquadium
 Data1: Ununseptium
 Data1: Ununtrium
 Data1: Uranium
 Data1: Vanadium
 Data1: Xenon
 Data1: Ytterbium
 Data1: Yttrium
 Data1: Zinc
 Data1: Zirconium
 Glossary: Abundance
 Glossary: Lanthanides (old name)
 Glossary: Lanthanoids
 Glossary: Periodic Table
 Glossary: Periods
 Glossary: Transactinides
 Isotope: Xenon
 
periodic (67)
 Biography: Albert Ghiorso
 Biography: Antoine-Laurent de Lavoisier
 Biography: Dmitriy Ivanovich Mendeleyev
 Biography: Per Teodor Cleve
 Country: Outer space
 Data1: Bismuth
 Data1: Gallium
 Data1: Hafnium
 Data1: Helium
 Data1: Mendelevium
 Data1: Neptunium
 Data1: Plutonium
 Data1: Rhenium
 Data1: Scandium
 Data1: Technetium
 Document: The Alkali (Group 1) Metals
 Document: The Alkaline Earth Metals (Group 2)
 Document: The Halogens (Group 17)
 Document: The Transition Metals (Groups 3 to 12)
 Glossary: Abundance
 Glossary: Actinides
 Glossary: Actinoids
 Glossary: Alkali Metal
 Glossary: Alkali Metal (alkaline-earth metals)
 Glossary: Emission Spectrum
 Glossary: Group
 Glossary: Halogens
 Glossary: Island of Stability
 Glossary: IUPAC
 Glossary: Lanthanides (old name)
 Glossary: Lanthanoids
 Glossary: Noble Gasses (inert gasses)
 Glossary: Periodic Law
 Glossary: Periodic Table
 Isotope: Cobalt
 On This Day... 10 December
 On This Day... 16 February
 On This Day... 18 February
 On This Day... 19 August
 On This Day... 26 November
 On This Day... 8 February
 Reactions: Americium
 Reactions: Berkelium
 Reactions: Bohrium
 Reactions: Californium
 Reactions: Curium
 Reactions: Darmstadtium
 Reactions: Dubnium
 Reactions: Einsteinium
 Reactions: Fermium
 Reactions: Hassium
 Reactions: Lawrencium
 Reactions: Meitnerium
 Reactions: Mendelevium
 Reactions: Nobelium
 Reactions: Rhenium
 Reactions: Roentgenium
 Reactions: Rubidium
 Reactions: Rutherfordium
 Reactions: Seaborgium
 Reactions: Ununbium
 Reactions: Ununhexium
 Reactions: Ununoctium
 Reactions: Ununpentium
 Reactions: Ununquadium
 Reactions: Ununseptium
 Reactions: Ununtrium
 
periodical (1)
 Biography: Philip Hauge Abelson
 
periodicity (2)
 Data1: Germanium
 On This Day... 15 December
 
periods (9)
 Biography: Lise Meitner
 Biography: Pierre Curie
 Country: Outer space
 Data1: Technetium
 Document: The Transition Metals (Groups 3 to 12)
 Glossary: Periodic Table
 Glossary: Periods
 Glossary: Transactinides
 On This Day... 16 February
 
peripheral (1)
 Compounds: Magnesium
 
perlman (2)
 Data1: Curium
 Production: Curium
 
permanent (12)
 Compounds: Cobalt
 Data1: Bismuth
 Data1: Cerium
 Data1: Chromium
 Data1: Cobalt
 Data1: Gold
 Data1: Lithium
 Data1: Neodymium
 Data1: Roentgenium
 Data1: Samarium
 Data1: Sulfur
 Glossary: Magnetic Ordering
 
permanently (2)
 Data1: Fluorine
 Glossary: Electronegativity
 
permanganate (1)
 Data1: Manganese
 
permeability (1)
 Glossary: Magnetic Ordering
 
permeable (1)
 Production: Helium
 
permit (1)
 Production: Technetium
 
permits (1)
 Production: Germanium
 
perovskite (2)
 Country: Australia
 Production: Titanium
 
peroxide (12)
 Biography: Louis Jacques Thenard
 Compounds: Lithium
 Compounds: Magnesium
 Data1: Oxygen
 Data2: Carbon
 Data2: Chromium
 Data2: Lead
 Data2: Platinum
 Data2: Silver
 On This Day... 4 May
 Reactions: Lithium
 Reactions: Sodium
 
peroxides (3)
 Compounds: Boron
 Compounds: Sodium
 Data1: Potassium
 
perpendicular (2)
 Glossary: Poisson Ratio
 Glossary: Thermal Conductivity
 
perrhenate (1)
 Production: Rhenium
 
perrhenic (1)
 Reactions: Rhenium
 
perrier (1)
 Data1: Technetium
 
persecution (1)
 Biography: Lise Meitner
 
persia (1)
 Data1: Arsenic
 
persian (1)
 Data1: Cobalt
 
persistence (2)
 Biography: Jöns Jacob Berzelius
 Compounds: Strontium
 
persists (1)
 Equation: Boyle's Law
 
person (8)
 Biography: Glenn Theodore Seaborg
 Biography: Johann Schroder
 Data1: Bohrium
 Data1: Helium
 Data1: Phosphorus
 Data1: Samarium
 Data1: Seaborgium
 On This Day... 24 May
 
personal (4)
 Biography: Jöns Jacob Berzelius
 Biography: Julius Caesar Scaliger
 Biography: Robert Wilhelm Bunsen
 Data1: Thulium
 
persons (1)
 Glossary: Air
 
persuaded (2)
 Data1: Cerium
 Data1: Technetium
 
persulfate (1)
 Compounds: Sodium
 
pertechnetate (2)
 Compounds: Technetium
 Production: Technetium
 
pertechnetic (1)
 Reactions: Technetium
 
peru (16)
 Country: Peru
 Data1: Antimony
 Data1: Bismuth
 Data1: Gold
 Data1: Platinum
 Data1: Silver
 Data1: Tellurium
 Data1: Zinc
 Production: Arsenic
 Production: Bismuth
 Production: Copper
 Production: Gold
 Production: Mercury
 Production: Silver
 Production: Tellurium
 Production: Zinc
 
perutz (1)
 On This Day... 19 May
 
pervasive (1)
 Data1: Copper
 
perxenate (1)
 Compounds: Xenon
 
pest (3)
 Allotrope: Tin
 Compounds: Phosphorus
 Data1: Sulfur
 
pesticide (1)
 Compounds: Potassium
 
pesticides (6)
 Compounds: Arsenic
 Compounds: Boron
 Compounds: Sodium
 Data1: Arsenic
 Data1: Phosphorus
 Data1: Sulfur
 
pet (2)
 Compounds: Sodium
 Isotope: Fluorine
 
petalite (2)
 Data1: Lithium
 Production: Lithium
 
peter (15)
 Biography: Gottfried Münzenberg
 Biography: Peter Armbruster
 Biography: Robert Wilhelm Bunsen
 Data1: Bohrium
 Data1: Chromium
 Data1: Darmstadtium
 Data1: Hassium
 Data1: Meitnerium
 Data1: Molybdenum
 Data1: Roentgenium
 Data1: Tungsten
 On This Day... 16 February
 On This Day... 17 September
 On This Day... 24 March
 On This Day... 25 July
 
petersburg (2)
 Biography: Dmitriy Ivanovich Mendeleyev
 On This Day... 16 February
 
petit (2)
 On This Day... 12 February
 On This Day... 2 October
 
petrochemical (1)
 Production: Hydrogen
 
petroleum (14)
 Compounds: Aluminium
 Compounds: Carbon
 Compounds: Sulfur
 Data1: Barium
 Data1: Chlorine
 Data1: Hydrogen
 Data1: Palladium
 Data1: Tungsten
 Document: The Lanthanoid Series
 On This Day... 13 January
 On This Day... 14 May
 On This Day... 23 March
 On This Day... 27 August
 Production: Carbon
 
pettersson (1)
 Data1: Titanium
 
petzite (1)
 Production: Tellurium
 
pewter (1)
 Data1: Tin
 
pf3 (1)
 Reactions: Phosphorus
 
ph (16)
 Biography: Dale R. Corson
 Biography: Edwin Mattison McMillan
 Biography: Glenn Theodore Seaborg
 Biography: Gottfried Münzenberg
 Biography: Peter Armbruster
 Compounds: Potassium
 Compounds: Sodium
 Data1: Carbon
 Equation: pH defined
 Glossary: Acid
 Glossary: Base
 Glossary: pH
 On This Day... 9 January
 Reactions: Bromine
 Reactions: Chlorine
 Reactions: Iodine
 
ph3 (2)
 Compounds: Phosphorus
 Reactions: Phosphorus
 
pharamaceuticals (1)
 Compounds: Arsenic
 
pharmaceutical (5)
 Compounds: Calcium
 Compounds: Chlorine
 Compounds: Magnesium
 Data1: Cadmium
 Data1: Magnesium
 
pharmaceuticals (7)
 Biography: Antoine Alexandre Brutus Bussy
 Compounds: Aluminium
 Compounds: Boron
 Compounds: Calcium
 Data1: Bismuth
 Data1: Bromine
 Data1: Lithium
 
pharmacie (1)
 Biography: Ferdinand Frederic Henri Moissan
 
pharmacist (4)
 Biography: Bernard Courtois
 Biography: Ferdinand Frederic Henri Moissan
 Biography: Jöns Jacob Berzelius
 Data1: Oxygen
 
pharmacologist (1)
 Biography: Johann Schroder
 
pharmacy (3)
 Biography: Antoine-Jerome Balard
 Biography: Karl Wilhelm Scheele
 Biography: Louis Jacques Thenard
 
phase (16)
 Allotrope: Plutonium
 Compounds: Sodium
 Data1: Bismuth
 Data1: Boron
 Data1: Rhenium
 Data1: Rubidium
 Data1: Tellurium
 Data1: Xenon
 Data1: Yttrium
 Glossary: Melting Point (freezing point)
 On This Day... 11 February
 On This Day... 24 September
 Production: Thorium
 Reactions: Bromine
 Reactions: Chlorine
 Reactions: Fluorine
 
phases (4)
 Country: Outer space
 Data1: Helium
 Glossary: Alloy
 Glossary: Goldschmidt Classification
 
phd (4)
 Biography: Hans Christian Oersted
 Biography: Jöns Jacob Berzelius
 Biography: Joseph W. Kennedy
 Biography: Philip Hauge Abelson
 
phenakite (2)
 Data1: Beryllium
 Production: Beryllium
 
phenol (2)
 On This Day... 5 April
 On This Day... 7 December
 
phenolic (1)
 Allotrope: Carbon
 
phenols (1)
 Data1: Bromine
 
phenomena (4)
 Biography: Julius Caesar Scaliger
 Biography: Michael Faraday
 Biography: Robert Wilhelm Bunsen
 Biography: Sir William Crookes
 
phenomenon (6)
 Biography: Lise Meitner
 Biography: Pierre Curie
 Country: United Kingdom
 Data1: Helium
 On This Day... 16 August
 Production: Europium
 
phil (1)
 Biography: John Dalton
 
philadelphia (1)
 Biography: Philip Hauge Abelson
 
philharmonic (1)
 Biography: Michael Faraday
 
philip (7)
 Biography: Philip Hauge Abelson
 Data1: Neptunium
 Data1: Platinum
 Data1: Plutonium
 On This Day... 22 March
 On This Day... 27 April
 On This Day... 8 June
 
philippe (1)
 Biography: Louis Jacques Thenard
 
philippines (2)
 Country: Philippines
 Data1: Chromium
 
philisophers (1)
 Biography: Hennig Brand
 
philosopher (4)
 Biography: Julius Caesar Scaliger
 Biography: Michael Faraday
 Biography: Walter Noddack
 Data1: Oxygen
 
philosophical (5)
 Biography: Gottfried Münzenberg
 Biography: John Dalton
 Biography: Joseph Priestley
 Biography: Michael Faraday
 On This Day... 21 October
 
philosophy (5)
 Biography: Franz-Joseph Muller Freiherr von Reichenstein
 Biography: Hans Christian Oersted
 Biography: Joseph Priestley
 Biography: Julius Caesar Scaliger
 Data1: Sodium
 
phlogistic (1)
 On This Day... 8 November
 
phlogisticated (1)
 Compounds: Nitrogen
 
phlogiston (5)
 Biography: Antoine-Laurent de Lavoisier
 Biography: Joseph Priestley
 Compounds: Nitrogen
 On This Day... 13 February
 On This Day... 19 April
 
phones (2)
 Compounds: Lithium
 Compounds: Tantalum
 
phonon (2)
 Glossary: Electrical Resistivity
 Glossary: Thermal Conductivity
 
phonons (1)
 Glossary: Thermal Conductivity
 
phoros (1)
 Data1: Phosphorus
 
phorous (1)
 Data2: Beryllium
 
phos (2)
 Data1: Phosphorus
 Data2: Beryllium
 
phosphatases (1)
 Production: Hydrogen
 
phosphate (13)
 Compounds: Calcium
 Compounds: Lanthanum
 Compounds: Nitrogen
 Compounds: Phosphorus
 Compounds: Sodium
 Compounds: Zinc
 Data1: Lutetium
 Data1: Phosphorus
 Production: Lutetium
 Production: Phosphorus
 Production: Polonium
 Production: Thorium
 Production: Uranium
 
phosphates (4)
 Compounds: Calcium
 Compounds: Sodium
 Data1: Phosphorus
 Production: Uranium
 
phosphating (1)
 Data1: Manganese
 
phosphide (5)
 Compounds: Aluminium
 Compounds: Indium
 Compounds: Phosphorus
 Data1: Indium
 Glossary: Semiconductor
 
phosphine (1)
 Compounds: Phosphorus
 
phosphite (1)
 Production: Hydrogen
 
phosphonate (1)
 Compounds: Samarium
 
phosphor (8)
 Compounds: Cadmium
 Compounds: Iodine
 Compounds: Lithium
 Compounds: Strontium
 Data1: Europium
 Data1: Phosphorus
 Data1: Samarium
 Names: Phosphorus
 
phosphore (1)
 Names: Phosphorus
 
phosphorescence (5)
 Compounds: Strontium
 Data1: Phosphorus
 Data1: Radon
 On This Day... 14 September
 Reactions: Arsenic
 
phosphorescent (3)
 Allotrope: Phosphorus
 Data1: Europium
 Data1: Strontium
 
phosphoric (6)
 Biography: Andreas Sigismund Marggraf
 Compounds: Nitrogen
 Compounds: Phosphorus
 Compounds: Potassium
 On This Day... 19 August
 Production: Phosphorus
 
phosphoros (1)
 Data1: Phosphorus
 
phosphorous (3)
 Glossary: Allotrope
 On This Day... 26 November
 Production: Phosphorus
 
phosphors (8)
 Compounds: Dysprosium
 Compounds: Yttrium
 Data1: Cadmium
 Data1: Europium
 Data1: Gadolinium
 Data1: Tungsten
 Data1: Yttrium
 Document: The Lanthanoid Series
 
phosphorus (23)
 Allotrope: Phosphorus
 Atomic data: Phosphorus
 Biography: Antoine-Laurent de Lavoisier
 Biography: Hennig Brand
 Biography: John Dalton
 Compounds: Phosphorus
 Compounds: Sodium
 Data1: Lanthanum
 Data1: Phosphorus
 Data2: Bromine
 Data2: Phosphorus
 Data2: Platinum
 Document: Abundance of the Elements in the Solar System
 Document: Chemical makeup of the human body
 Glossary: Allotrope
 Glossary: Metalloids
 Isotope: Hydrogen
 MAC data: Phosphorus
 Names: Phosphorus
 Production: Phosphorus
 Reactions: Helium
 Reactions: Phosphorus
 Spectrum: Phosphorus
 
phosphrous (2)
 Data1: Phosphorus
 Isotope: Phosphorus
 
phossy (1)
 Data1: Phosphorus
 
photo (2)
 Compounds: Sodium
 Data1: Indium
 
photocells (2)
 Data1: Promethium
 Data1: Thallium
 
photochemical (2)
 Biography: Robert Wilhelm Bunsen
 Compounds: Sulfur
 
photochemistry (2)
 Biography: Joseph Louis Gay-Lussac
 On This Day... 15 August
 
photochromic (1)
 Compounds: Silver
 
photoconductor (1)
 Data1: Selenium
 
photoconductors (1)
 Data1: Selenium
 
photocopiers (1)
 Allotrope: Oxygen
 
photodissociate (1)
 Compounds: Sulfur
 
photoelectric (7)
 Data1: Caesium
 Data1: Promethium
 Data1: Rubidium
 Data1: Selenium
 Data1: Thorium
 Document: The Actinoid Series
 On This Day... 22 March
 
photograph (2)
 Glossary: X-Rays
 On This Day... 24 July
 
photographic (13)
 Compounds: Bromine
 Compounds: Copper
 Compounds: Iodine
 Compounds: Silver
 Compounds: Sodium
 Compounds: Tantalum
 Data1: Erbium
 Data1: Silver
 Data1: Sulfur
 Data1: Technetium
 Data1: Uranium
 On This Day... 16 August
 On This Day... 16 March
 
photographically (1)
 On This Day... 16 August
 
photographies (1)
 Biography: Pierre Jules César Janssen
 
photographs (2)
 Biography: Pierre Jules César Janssen
 On This Day... 24 July
 
photography (5)
 Compounds: Iodine
 Data1: Iodine
 Data1: Sodium
 On This Day... 16 March
 On This Day... 24 July
 
photoluminescent (1)
 Compounds: Strontium
 
photometer (2)
 On This Day... 16 March
 On This Day... 26 March
 
photon (3)
 Compounds: Lutetium
 Glossary: Emission Spectrum
 Glossary: Photon
 
photonic (2)
 Glossary: Elecron Work Function
 Glossary: Temperature
 
photons (8)
 Compounds: Iodine
 Compounds: Silver
 Compounds: Sulfur
 Glossary: Antimatter
 Glossary: Gamma Ray
 Glossary: Radiation
 Glossary: X-Rays
 Production: Rhodium
 
photorefractive (2)
 Compounds: Cadmium
 Compounds: Zinc
 
photoresistor (1)
 Compounds: Cadmium
 
photosensitive (2)
 Compounds: Cadmium
 Compounds: Cerium
 
photosynthesis (3)
 Data1: Oxygen
 Glossary: Endothermic
 Production: Oxygen
 
photosynthetic (1)
 Production: Hydrogen
 
photothermograpic (1)
 Compounds: Lead
 
photovoltaic (6)
 Compounds: Cadmium
 Compounds: Copper
 Compounds: Gadolinium
 Compounds: Indium
 Compounds: Selenium
 Data1: Gallium
 
phrase (3)
 Data1: Copper
 Data1: Tin
 On This Day... 18 February
 
phthalic (1)
 Compounds: Vanadium
 
physical (27)
 Allotrope: Carbon
 Biography: Frederick Soddy
 Biography: Ida Eva Tacke Noddack
 Biography: John Dalton
 Biography: Pierre Curie
 Biography: Sir William Ramsay
 Biography: Walter Noddack
 Compounds: Titanium
 Data1: Antimony
 Data1: Carbon
 Data1: Chlorine
 Data1: Plutonium
 Data1: Ununhexium
 Data1: Ytterbium
 Glossary: Acid
 Glossary: Allotrope
 Glossary: Alloy
 Glossary: Enthalpy Change of Vapourisation
 Glossary: Heat Capacity
 Glossary: Metals
 Glossary: Periodic Law
 Glossary: Radioactivity
 Glossary: Reagent
 Glossary: Temperature
 On This Day... 14 June
 On This Day... 19 July
 On This Day... 30 October
 
physically (1)
 Glossary: Conduction
 
physicans (1)
 Biography: Jöns Jacob Berzelius
 
physician (8)
 Biography: Carl Gustav Mosander
 Biography: Friedrich Wöhler
 Biography: Johann Schroder
 Biography: Julius Caesar Scaliger
 Biography: Pierre Curie
 Biography: William Hyde Wollaston
 On This Day... 23 April
 On This Day... 31 July
 
physicians (1)
 Data1: Radon
 
physicist (66)
 Biography: Arthur C. Wahl
 Biography: Arthur Jeffrey Dempster
 Biography: Dirk Coster
 Biography: Edwin Mattison McMillan
 Biography: Emilio Gino Segre
 Biography: Enrico Fermi
 Biography: Friedrich Ernst Dorn
 Biography: Gustav Robert Kirchhoff
 Biography: Henry Cavendish
 Biography: Ida Eva Tacke Noddack
 Biography: Irene Joliot-Curie
 Biography: Johan Gadolin
 Biography: John Dalton
 Biography: Joseph Louis Gay-Lussac
 Biography: Marguerite Catherine Perey
 Biography: Marie Curie (Marya Sklodowska)
 Biography: Michael Faraday
 Biography: Robert Wilhelm Bunsen
 Data1: Aluminium
 Data1: Bohrium
 Data1: Bromine
 Data1: Helium
 Data1: Meitnerium
 Data1: Oxygen
 Data1: Rutherfordium
 Data1: Yttrium
 Glossary: Fahrenheit
 On This Day... 1 November
 On This Day... 10 July
 On This Day... 10 June
 On This Day... 10 October
 On This Day... 10 September
 On This Day... 12 March
 On This Day... 14 August
 On This Day... 14 May
 On This Day... 15 May
 On This Day... 15 September
 On This Day... 16 March
 On This Day... 17 August
 On This Day... 17 March
 On This Day... 18 September
 On This Day... 19 November
 On This Day... 19 October
 On This Day... 2 March
 On This Day... 2 May
 On This Day... 20 April
 On This Day... 20 July
 On This Day... 21 June
 On This Day... 21 May
 On This Day... 22 August
 On This Day... 22 October
 On This Day... 22 September
 On This Day... 25 December
 On This Day... 25 July
 On This Day... 25 October
 On This Day... 27 July
 On This Day... 28 May
 On This Day... 28 September
 On This Day... 29 July
 On This Day... 30 July
 On This Day... 31 May
 On This Day... 4 March
 On This Day... 5 October
 On This Day... 8 September
 On This Day... 9 April
 On This Day... 9 July
 
physicistm (1)
 On This Day... 14 March
 
physicists (8)
 Biography: Arthur Jeffrey Dempster
 Biography: Hans Christian Oersted
 Data1: Bohrium
 Data1: Helium
 Data1: Meitnerium
 Data1: Nobelium
 Glossary: Antiproton
 Glossary: Magnetic Ordering
 
physico (1)
 On This Day... 21 June
 
physics (42)
 Biography: Dale R. Corson
 Biography: Dirk Coster
 Biography: Edwin Mattison McMillan
 Biography: Emilio Gino Segre
 Biography: Enrico Fermi
 Biography: Gottfried Münzenberg
 Biography: Institute for Heavy Ion Research (GSI)
 Biography: Irene Joliot-Curie
 Biography: John William Strutt Rayleigh
 Biography: Jöns Jacob Berzelius
 Biography: Julius Caesar Scaliger
 Biography: Lise Meitner
 Biography: Marie Curie (Marya Sklodowska)
 Biography: Peter Armbruster
 Biography: Pierre Curie
 Biography: Pierre Jules César Janssen
 Biography: William Hyde Wollaston
 Data1: Fermium
 Data1: Praseodymium
 Data1: Rutherfordium
 Glossary: Anti-Neutrino
 Glossary: Antiproton
 Glossary: Baryon
 Glossary: Electron Volt
 Glossary: Island of Stability
 Glossary: Kelvin (absolute temperature)
 Glossary: Magic Number
 Glossary: Quantum Mechanics
 Isotope: Barium
 On This Day... 15 December
 On This Day... 15 May
 On This Day... 16 August
 On This Day... 18 June
 On This Day... 21 April
 On This Day... 22 March
 On This Day... 25 April
 On This Day... 27 March
 On This Day... 3 December
 On This Day... 5 December
 On This Day... 7 November
 On This Day... 8 August
 Production: Francium
 
physikalische (2)
 Biography: Peter Armbruster
 Biography: Walter Noddack
 
physiological (4)
 Biography: Robert Wilhelm Bunsen
 Biography: Sir Humphry Davy
 Compounds: Iodine
 On This Day... 16 April
 
physiologically (1)
 Data1: Titanium
 
physiologist (1)
 On This Day... 17 September
 
physiology (2)
 On This Day... 16 September
 On This Day... 20 July
 
physique (1)
 Biography: Andre Louis Debierne
 
pi (1)
 On This Day... 14 March
 
pi3 (1)
 Reactions: Phosphorus
 
pickles (2)
 Compounds: Calcium
 Compounds: Potassium
 
pickling (2)
 Compounds: Fluorine
 Compounds: Sodium
 
picture (5)
 Compounds: Yttrium
 Data1: Cadmium
 Data1: Europium
 Data1: Praseodymium
 Document: The Lanthanoid Series
 
pictures (2)
 Biography: Sir Humphry Davy
 Data1: Francium
 
pidgeon (1)
 Production: Magnesium
 
piece (5)
 Biography: Charles Hatchett
 Biography: Julius Caesar Scaliger
 Biography: Karl Wilhelm Scheele
 Biography: Robert Wilhelm Bunsen
 Glossary: Brinell Hardness
 
pieces (10)
 Biography: Michael Faraday
 Biography: Robert Wilhelm Bunsen
 Biography: Sir Humphry Davy
 Data1: Antimony
 Data1: Indium
 Data1: Neodymium
 Data1: Praseodymium
 Data1: Sodium
 Data1: Zinc
 Production: Antimony
 
piedmont (1)
 Biography: Julius Caesar Scaliger
 
pierce (1)
 Data1: Scandium
 
piercing (3)
 Data1: Niobium
 Data1: Uranium
 Document: The Actinoid Series
 
pierette (1)
 Biography: Antoine-Laurent de Lavoisier
 
pierre (18)
 Biography: Andre Louis Debierne
 Biography: Antoine-Laurent de Lavoisier
 Biography: Irene Joliot-Curie
 Biography: Marie Curie (Marya Sklodowska)
 Biography: Pierre Curie
 Biography: Pierre Jules César Janssen
 Data1: Aluminium
 Data1: Curium
 Data1: Helium
 Data1: Polonium
 Data1: Radium
 On This Day... 10 June
 On This Day... 12 February
 On This Day... 13 January
 On This Day... 14 May
 On This Day... 15 May
 On This Day... 22 March
 On This Day... 9 October
 
pieter (2)
 Biography: Emilio Gino Segre
 On This Day... 25 May
 
piezo (1)
 Biography: Pierre Curie
 
piezoelectric (3)
 Compounds: Barium
 Compounds: Lithium
 Compounds: Tantalum
 
piezoelectricity (1)
 Biography: Pierre Curie
 
pig (57)
 Country: Algeria
 Country: Argentina
 Country: Australia
 Country: Austria
 Country: Belgium
 Country: Bosnia and Herzegovina
 Country: Brazil
 Country: Bulgaria
 Country: Burma (Myanmar)
 Country: Canada
 Country: Chile
 Country: China
 Country: Colombia
 Country: Czech Republic
 Country: Democratic People's Republic of Korea
 Country: Egypt
 Country: Finland
 Country: France
 Country: Germany
 Country: Hungary
 Country: India
 Country: Indonesia
 Country: Iran
 Country: Italy
 Country: Japan
 Country: Kazakhstan
 Country: Libya
 Country: Malaysia
 Country: Mexico
 Country: Netherlands
 Country: New Zealand
 Country: Norway
 Country: Pakistan
 Country: Paraguay
 Country: Peru
 Country: Poland
 Country: Qatar
 Country: Republic of Korea
 Country: Romania
 Country: Russia
 Country: Saudi Arabia
 Country: Serbia
 Country: Slovakia
 Country: South Africa
 Country: Spain
 Country: Sweden
 Country: Switzerland
 Country: Taiwan
 Country: Trinidad and Tobago
 Country: Turkey
 Country: Ukraine
 Country: United Kingdom
 Country: United States of America
 Country: Venezuela
 Country: Zimbabwe
 Data1: Iron
 Production: Iron
 
pigment (15)
 Biography: Louis Jacques Thenard
 Compounds: Aluminium
 Compounds: Antimony
 Compounds: Barium
 Compounds: Cadmium
 Compounds: Cobalt
 Compounds: Copper
 Compounds: Sulfur
 Compounds: Tin
 Compounds: Titanium
 Data1: Cadmium
 Data1: Chromium
 Data1: Titanium
 Data1: Uranium
 Data1: Zinc
 
pigmented (1)
 Data1: Manganese
 
pigments (13)
 Compounds: Barium
 Compounds: Cadmium
 Compounds: Cobalt
 Compounds: Zirconium
 Data1: Cadmium
 Data1: Carbon
 Data1: Lead
 Data1: Magnesium
 Data1: Molybdenum
 Data1: Selenium
 Data1: Zinc
 On This Day... 13 August
 Production: Arsenic
 
pigs (1)
 Data1: Lead
 
pila (1)
 On This Day... 18 February
 
pile (3)
 Biography: Michael Faraday
 On This Day... 18 February
 On This Day... 2 December
 
piles (1)
 Production: Uranium
 
pills (3)
 Compounds: Boron
 Compounds: Magnesium
 Data1: Mercury
 
pineapple (1)
 Data1: Chlorine
 
pines (1)
 On This Day... 4 December
 
pinhole (1)
 Equation: Graham's Law
 
pink (10)
 Compounds: Cobalt
 Compounds: Erbium
 Compounds: Tin
 Data1: Erbium
 Data1: Iodine
 Data1: Terbium
 Production: Erbium
 Reactions: Europium
 Reactions: Promethium
 Reactions: Terbium
 
pinkish (1)
 Data1: Scandium
 
pins (1)
 Data1: Titanium
 
pinto (1)
 Data1: Platinum
 
piombo (1)
 Names: Lead
 
pioneer (7)
 Biography: Adair Crawford
 Biography: Andreas Sigismund Marggraf
 On This Day... 13 January
 On This Day... 21 February
 On This Day... 27 March
 On This Day... 29 March
 On This Day... 3 March
 
pioneered (5)
 Country: Canada
 Data1: Chlorine
 On This Day... 17 July
 On This Day... 24 July
 Production: Potassium
 
pioneering (1)
 Biography: John Dalton
 
pipe (6)
 Biography: Philip Hauge Abelson
 Compounds: Calcium
 Country: Australia
 Data1: Titanium
 On This Day... 22 March
 Production: Chromium
 
pipelines (1)
 Data1: Niobium
 
piperidine (1)
 On This Day... 28 July
 
pipes (6)
 Biography: Philip Hauge Abelson
 Country: United States of America
 Data1: Carbon
 Data1: Lead
 Production: Carbon
 Production: Lead
 
pipette (1)
 Biography: Joseph Louis Gay-Lussac
 
piping (3)
 Data1: Fluorine
 Data1: Zirconium
 Production: Fluorine
 
pisa (1)
 Biography: Enrico Fermi
 
pit (3)
 Production: Copper
 Production: Gold
 Production: Uranium
 
pitch (1)
 Data1: Xenon
 
pitchblende (19)
 Biography: Andre Louis Debierne
 Biography: Marie Curie (Marya Sklodowska)
 Biography: Martin Heinrich Klaproth
 Compounds: Radium
 Country: Australia
 Country: Canada
 Country: Czech Republic
 Country: Democratic Republic of Congo
 Country: United States of America
 Data1: Actinium
 Data1: Polonium
 Data1: Protactinium
 Data1: Radium
 Data1: Uranium
 On This Day... 1 March
 Production: Helium
 Production: Promethium
 Production: Protactinium
 Production: Radium
 
pitched (3)
 Data1: Helium
 Data1: Indium
 Data1: Xenon
 
pivots (1)
 Data1: Osmium
 
pka (1)
 Equation: Acid dissociation constant
 
pkb (1)
 Equation: Base ionisation constant
 
place (15)
 Allotrope: Oxygen
 Biography: Dirk Coster
 Biography: Jöns Jacob Berzelius
 Biography: Joseph Louis Gay-Lussac
 Biography: Louis Jacques Thenard
 Data1: Gallium
 Data1: Iodine
 Data1: Lawrencium
 Data1: Lead
 Data1: Phosphorus
 Isotope: Oxygen
 On This Day... 10 December
 On This Day... 18 February
 Reactions: Silicon
 Reactions: Strontium
 
placed (6)
 Biography: George Charles de Hevesy
 Biography: Irene Joliot-Curie
 Biography: Jöns Jacob Berzelius
 Biography: Julius Caesar Scaliger
 Glossary: Alkali Metal
 Isotope: Iridium
 
placentia (1)
 Data1: Phosphorus
 
placer (2)
 Production: Palladium
 Production: Platinum
 
places (21)
 Compounds: Sodium
 Data1: Copper
 Glossary: Enthalpy Change of Vapourisation
 Production: Potassium
 Production: Radium
 Reactions: Bohrium
 Reactions: Darmstadtium
 Reactions: Dubnium
 Reactions: Hassium
 Reactions: Lawrencium
 Reactions: Meitnerium
 Reactions: Roentgenium
 Reactions: Rutherfordium
 Reactions: Seaborgium
 Reactions: Ununbium
 Reactions: Ununhexium
 Reactions: Ununoctium
 Reactions: Ununpentium
 Reactions: Ununquadium
 Reactions: Ununseptium
 Reactions: Ununtrium
 
plagioclase (2)
 Data1: Rubidium
 Production: Calcium
 
plain (1)
 Data1: Selenium
 
plains (1)
 Country: United States of America
 
planar (2)
 Allotrope: Carbon
 Glossary: Aromatic
 
planck (3)
 Biography: Lise Meitner
 On This Day... 14 December
 On This Day... 23 April
 
plane (2)
 Allotrope: Carbon
 Compounds: Potassium
 
planes (1)
 Allotrope: Carbon
 
planet (16)
 Biography: Martin Heinrich Klaproth
 Country: Outer space
 Data1: Cerium
 Data1: Copper
 Data1: Helium
 Data1: Lead
 Data1: Mercury
 Data1: Neptunium
 Data1: Phosphorus
 Data1: Plutonium
 Data1: Uranium
 Data1: Xenon
 Glossary: Abundance
 Glossary: Air
 Production: Helium
 Production: Indium
 
planetary (5)
 Country: Outer space
 Data1: Mercury
 Glossary: Air
 Isotope: Aluminium
 Production: Nitrogen
 
planetesmals (1)
 Production: Neon
 
planets (7)
 Compounds: Carbon
 Country: Outer space
 Data1: Carbon
 Data1: Neon
 Data1: Plutonium
 Production: Carbon
 Production: Neon
 
plans (1)
 Biography: Irene Joliot-Curie
 
plant (23)
 Biography: Antoine-Laurent de Lavoisier
 Biography: Bernard Courtois
 Biography: Joseph Louis Gay-Lussac
 Biography: Philip Hauge Abelson
 Biography: Robert Wilhelm Bunsen
 Compounds: Iodine
 Compounds: Magnesium
 Compounds: Manganese
 Country: Algeria
 Country: Qatar
 Country: United States of America
 Data1: Calcium
 Data1: Helium
 Data1: Lithium
 Data1: Magnesium
 Data1: Phosphorus
 Data1: Radon
 Data1: Thallium
 Glossary: Gamma Ray
 Isotope: Boron
 On This Day... 13 August
 Production: Phosphorus
 Production: Technetium
 
plantarum (1)
 Biography: Julius Caesar Scaliger
 
plantis (1)
 Biography: Julius Caesar Scaliger
 
plants (28)
 Biography: Morris Travers
 Compounds: Boron
 Compounds: Calcium
 Compounds: Magnesium
 Compounds: Nitrogen
 Compounds: Oxygen
 Compounds: Phosphorus
 Compounds: Potassium
 Country: United States of America
 Data1: Boron
 Data1: Cadmium
 Data1: Copper
 Data1: Helium
 Data1: Iodine
 Data1: Oxygen
 Data1: Plutonium
 Data1: Sulfur
 Data1: Titanium
 Glossary: Endothermic
 Isotope: Caesium
 On This Day... 2 February
 Production: Iodine
 Production: Oxygen
 Production: Radon
 Production: Selenium
 Production: Technetium
 Production: Titanium
 Production: Uranium
 
plaque (2)
 Compounds: Sodium
 Data1: Zinc
 
plasma (14)
 Biography: Institute for Heavy Ion Research (GSI)
 Compounds: Indium
 Country: Outer space
 Data1: Argon
 Data1: Copper
 Data1: Hafnium
 Glossary: Gas
 Glossary: Liquid
 Glossary: Plasma
 Glossary: Solid
 Isotope: Sodium
 On This Day... 19 March
 On This Day... 22 August
 Reactions: Helium
 
plaster (1)
 Data1: Calcium
 
plastic (6)
 Compounds: Praseodymium
 Data1: Fluorine
 Data1: Sodium
 Glossary: Magnetic Ordering
 On This Day... 7 December
 Production: Fluorine
 
plastics (13)
 Compounds: Antimony
 Compounds: Cadmium
 Compounds: Calcium
 Compounds: Magnesium
 Compounds: Molybdenum
 Compounds: Oxygen
 Compounds: Titanium
 Compounds: Zinc
 Data1: Bromine
 Data1: Carbon
 Data1: Chlorine
 Data1: Mercury
 Data1: Molybdenum
 
plata (1)
 Names: Silver
 
plate (7)
 Compounds: Copper
 Data1: Technetium
 Data1: Tellurium
 Data1: Uranium
 Glossary: Alkali Metal (alkaline-earth metals)
 On This Day... 16 March
 Production: Uranium
 
plateau (1)
 Production: Uranium
 
plated (3)
 Compounds: Titanium
 Data1: Antimony
 Data1: Indium
 
plates (3)
 Biography: Bernard Courtois
 Biography: Sir Humphry Davy
 Data1: Molybdenum
 
platin (1)
 Names: Platinum
 
platina (2)
 Data1: Platinum
 Names: Platinum
 
platine (1)
 Names: Platinum
 
plating (12)
 Compounds: Silver
 Compounds: Tin
 Compounds: Zinc
 Data1: Chromium
 Data1: Molybdenum
 Data1: Nickel
 Data1: Rhenium
 Data1: Titanium
 Data1: Uranium
 Document: The Actinoid Series
 On This Day... 3 August
 On This Day... 31 December
 
platiniridium (1)
 Production: Platinum
 
platino (1)
 Names: Platinum
 
platinum (51)
 Atomic data: Platinum
 Biography: Ferdinand Frederic Henri Moissan
 Biography: Robert Wilhelm Bunsen
 Biography: William Hyde Wollaston
 Compounds: Iridium
 Compounds: Nitrogen
 Compounds: Osmium
 Compounds: Platinum
 Compounds: Silicon
 Country: Canada
 Country: Colombia
 Country: Outer space
 Country: Russia
 Country: South Africa
 Country: United States of America
 Country: Zimbabwe
 Data1: Darmstadtium
 Data1: Gold
 Data1: Iridium
 Data1: Osmium
 Data1: Palladium
 Data1: Platinum
 Data1: Rhenium
 Data1: Rhodium
 Data1: Ruthenium
 Data1: Silver
 Data1: Technetium
 Data1: Titanium
 Data2: Platinum
 Document: Abundance of the Elements in the Solar System
 Document: The Lanthanoid Series
 Glossary: Aqua regia
 Isotope: Platinum
 MAC data: Platinum
 Names: Platinum
 On This Day... 11 January
 On This Day... 15 December
 On This Day... 24 March
 On This Day... 9 October
 Production: Hydrogen
 Production: Iridium
 Production: Osmium
 Production: Palladium
 Production: Platinum
 Production: Polonium
 Production: Rhodium
 Production: Ruthenium
 Production: Tellurium
 Reactions: Darmstadtium
 Reactions: Platinum
 Spectrum: Platinum
 
play (7)
 Biography: Irene Joliot-Curie
 Data1: Lead
 Document: The Halogens (Group 17)
 Glossary: Electrical Resistivity
 Glossary: Temperature
 Production: Copper
 Production: Technetium
 
played (3)
 Biography: Gottfried Münzenberg
 Data1: Copper
 Data1: Tungsten
 
player (1)
 Compounds: Neodymium
 
players (1)
 Biography: Robert Wilhelm Bunsen
 
playfair (1)
 Biography: Robert Wilhelm Bunsen
 
plays (6)
 Country: Outer space
 Data1: Holmium
 Data1: Lutetium
 Data1: Rhodium
 Data1: Ruthenium
 Production: Selenium
 
pleasant (1)
 Compounds: Nitrogen
 
pleased (1)
 Biography: Robert Wilhelm Bunsen
 
plentiful (5)
 Data1: Aluminium
 Data1: Gold
 Production: Aluminium
 Production: Chromium
 Production: Uranium
 
plomb (1)
 Names: Lead
 
plomo (1)
 Names: Lead
 
plots (93)
 Data2: Actinium
 Data2: Aluminium
 Data2: Americium
 Data2: Antimony
 Data2: Arsenic
 Data2: Astatine
 Data2: Barium
 Data2: Berkelium
 Data2: Beryllium
 Data2: Bismuth
 Data2: Boron
 Data2: Bromine
 Data2: Cadmium
 Data2: Caesium
 Data2: Calcium
 Data2: Californium
 Data2: Carbon
 Data2: Cerium
 Data2: Chlorine
 Data2: Chromium
 Data2: Cobalt
 Data2: Copper
 Data2: Curium
 Data2: Dysprosium
 Data2: Erbium
 Data2: Europium
 Data2: Fluorine
 Data2: Francium
 Data2: Gadolinium
 Data2: Gallium
 Data2: Germanium
 Data2: Gold
 Data2: Hafnium
 Data2: Holmium
 Data2: Hydrogen
 Data2: Indium
 Data2: Iodine
 Data2: Iron
 Data2: Lanthanum
 Data2: Lawrencium
 Data2: Lead
 Data2: Lithium
 Data2: Lutetium
 Data2: Magnesium
 Data2: Manganese
 Data2: Mercury
 Data2: Molybdenum
 Data2: Neodymium
 Data2: Neptunium
 Data2: Nickel
 Data2: Niobium
 Data2: Nitrogen
 Data2: Nobelium
 Data2: Osmium
 Data2: Oxygen
 Data2: Palladium
 Data2: Phosphorus
 Data2: Platinum
 Data2: Plutonium
 Data2: Polonium
 Data2: Potassium
 Data2: Praseodymium
 Data2: Promethium
 Data2: Protactinium
 Data2: Radium
 Data2: Rhenium
 Data2: Rhodium
 Data2: Rubidium
 Data2: Ruthenium
 Data2: Samarium
 Data2: Scandium
 Data2: Selenium
 Data2: Silicon
 Data2: Silver
 Data2: Sodium
 Data2: Sulfur
 Data2: Tantalum
 Data2: Technetium
 Data2: Tellurium
 Data2: Terbium
 Data2: Thallium
 Data2: Thorium
 Data2: Thulium
 Data2: Tin
 Data2: Titanium
 Data2: Tungsten
 Data2: Uranium
 Data2: Vanadium
 Data2: Xenon
 Data2: Ytterbium
 Data2: Yttrium
 Data2: Zinc
 Data2: Zirconium
 
ploughs (1)
 Data1: Manganese
 
plug (1)
 Equation: Graham's Law
 
plugs (2)
 Data1: Iridium
 Data1: Rhodium
 
plumbing (4)
 Compounds: Titanium
 Data1: Copper
 Data1: Lead
 Data1: Selenium
 
plumbites (1)
 Reactions: Lead
 
plumbum (2)
 Data1: Lead
 Names: Lead
 
plums (1)
 Compounds: Sodium
 
plunge (1)
 Glossary: Enthalpy Change of Fusion (Heat of Fusion)
 
plunging (1)
 Biography: Ferdinand Frederic Henri Moissan
 
plural (1)
 Glossary: Nucleus
 
plus (4)
 Biography: William Gregor
 Glossary: Mole
 Glossary: Positron Emission (Beta+ Decay)
 Production: Technetium
 
plutium (1)
 Data1: Plutonium
 
pluto (1)
 Data1: Plutonium
 
plutonij (1)
 Names: Plutonium
 
plutonio (1)
 Names: Plutonium
 
plutonium (41)
 Allotrope: Plutonium
 Atomic data: Plutonium
 Biography: Arthur C. Wahl
 Biography: Edwin Mattison McMillan
 Biography: Emilio Gino Segre
 Biography: Glenn Theodore Seaborg
 Biography: Joseph W. Kennedy
 Compounds: Plutonium
 Data1: Actinium
 Data1: Americium
 Data1: Curium
 Data1: Einsteinium
 Data1: Neptunium
 Data1: Plutonium
 Data1: Promethium
 Data1: Protactinium
 Data1: Rutherfordium
 Data2: Plutonium
 Document: The Actinoid Series
 Document: The Lanthanoid Series
 Glossary: Actinides
 Glossary: Actinoids
 Isotope: Iodine
 Isotope: Krypton
 Isotope: Plutonium
 Isotope: Uranium
 MAC data: Plutonium
 Names: Plutonium
 On This Day... 14 December
 On This Day... 23 February
 On This Day... 28 March
 Production: Americium
 Production: Curium
 Production: Einsteinium
 Production: Neptunium
 Production: Plutonium
 Production: Rutherfordium
 Production: Technetium
 Production: Ununquadium
 Reactions: Plutonium
 Spectrum: Plutonium
 
plutonyl (1)
 Compounds: Plutonium
 
pm (113)
 Atomic data: Promethium
 Data1: Promethium
 Data2: Actinium
 Data2: Aluminium
 Data2: Americium
 Data2: Antimony
 Data2: Argon
 Data2: Arsenic
 Data2: Astatine
 Data2: Barium
 Data2: Berkelium
 Data2: Beryllium
 Data2: Bismuth
 Data2: Bohrium
 Data2: Boron
 Data2: Bromine
 Data2: Cadmium
 Data2: Caesium
 Data2: Calcium
 Data2: Californium
 Data2: Carbon
 Data2: Cerium
 Data2: Chlorine
 Data2: Chromium
 Data2: Cobalt
 Data2: Copper
 Data2: Curium
 Data2: Darmstadtium
 Data2: Dubnium
 Data2: Dysprosium
 Data2: Einsteinium
 Data2: Erbium
 Data2: Europium
 Data2: Fluorine
 Data2: Francium
 Data2: Gadolinium
 Data2: Gallium
 Data2: Germanium
 Data2: Gold
 Data2: Hafnium
 Data2: Hassium
 Data2: Helium
 Data2: Holmium
 Data2: Hydrogen
 Data2: Indium
 Data2: Iodine
 Data2: Iridium
 Data2: Iron
 Data2: Krypton
 Data2: Lanthanum
 Data2: Lead
 Data2: Lithium
 Data2: Lutetium
 Data2: Magnesium
 Data2: Manganese
 Data2: Meitnerium
 Data2: Mercury
 Data2: Molybdenum
 Data2: Neodymium
 Data2: Neon
 Data2: Neptunium
 Data2: Nickel
 Data2: Niobium
 Data2: Nitrogen
 Data2: Osmium
 Data2: Oxygen
 Data2: Palladium
 Data2: Phosphorus
 Data2: Platinum
 Data2: Plutonium
 Data2: Polonium
 Data2: Potassium
 Data2: Praseodymium
 Data2: Promethium
 Data2: Protactinium
 Data2: Radium
 Data2: Radon
 Data2: Rhenium
 Data2: Rhodium
 Data2: Roentgenium
 Data2: Rubidium
 Data2: Ruthenium
 Data2: Rutherfordium
 Data2: Samarium
 Data2: Scandium
 Data2: Seaborgium
 Data2: Selenium
 Data2: Silicon
 Data2: Silver
 Data2: Sodium
 Data2: Strontium
 Data2: Sulfur
 Data2: Tantalum
 Data2: Technetium
 Data2: Tellurium
 Data2: Terbium
 Data2: Thallium
 Data2: Thorium
 Data2: Thulium
 Data2: Tin
 Data2: Titanium
 Data2: Tungsten
 Data2: Ununbium
 Data2: Uranium
 Data2: Vanadium
 Data2: Xenon
 Data2: Ytterbium
 Data2: Yttrium
 Data2: Zinc
 Data2: Zirconium
 Isotope: Promethium
 Reactions: Promethium
 Spectrum: Promethium
 
pm+ (1)
 Atomic data: Promethium
 
pm+3 (1)
 Data2: Promethium
 
pm2o3 (1)
 Compounds: Promethium
 
pm3+ (1)
 Reactions: Promethium
 
pn (1)
 Names: Calcium
 
pneumatic (3)
 Biography: Sir Humphry Davy
 On This Day... 24 March
 On This Day... 5 February
 
pnictogen (6)
 Data1: Antimony
 Data1: Arsenic
 Data1: Bismuth
 Data1: Nitrogen
 Data1: Phosphorus
 Data1: Ununpentium
 
po (10)
 Atomic data: Polonium
 Data1: Polonium
 Data2: Polonium
 Glossary: Metals
 Isotope: Astatine
 Isotope: Polonium
 Isotope: Radon
 Production: Polonium
 Reactions: Polonium
 Spectrum: Polonium
 
po+ (1)
 Atomic data: Polonium
 
po+2 (1)
 Data2: Polonium
 
po+4 (1)
 Data2: Polonium
 
po+6 (1)
 Data2: Polonium
 
po2 (1)
 Reactions: Polonium
 
po4 (14)
 Compounds: Calcium
 Compounds: Phosphorus
 Compounds: Zinc
 Data1: Cerium
 Data1: Fluorine
 Data1: Lutetium
 Data1: Neodymium
 Data1: Phosphorus
 Production: Cerium
 Production: Lanthanum
 Production: Lutetium
 Production: Neodymium
 Production: Terbium
 Production: Yttrium
 
po43 (1)
 Reactions: Phosphorus
 
pobr4 (1)
 Reactions: Polonium
 
pockets (1)
 Glossary: Thermal Conductivity
 
pocl4 (1)
 Reactions: Polonium
 
poesies (1)
 Biography: Julius Caesar Scaliger
 
poet (1)
 Biography: Dmitriy Ivanovich Mendeleyev
 
poetice (1)
 Biography: Julius Caesar Scaliger
 
poets (1)
 Compounds: Nitrogen
 
poi4 (1)
 Reactions: Polonium
 
point (152)
 Allotrope: Uranium
 Biography: (Gabriel) Daniel Fahrenheit
 Biography: Jöns Jacob Berzelius
 Biography: Julius Caesar Scaliger
 Biography: Morris Travers
 Biography: Pierre Curie
 Biography: Robert Wilhelm Bunsen
 Biography: Sir Humphry Davy
 Compounds: Arsenic
 Compounds: Barium
 Compounds: Europium
 Compounds: Niobium
 Compounds: Palladium
 Compounds: Samarium
 Compounds: Titanium
 Data1: Actinium
 Data1: Aluminium
 Data1: Americium
 Data1: Antimony
 Data1: Argon
 Data1: Arsenic
 Data1: Astatine
 Data1: Barium
 Data1: Berkelium
 Data1: Beryllium
 Data1: Bismuth
 Data1: Bohrium
 Data1: Boron
 Data1: Bromine
 Data1: Cadmium
 Data1: Caesium
 Data1: Calcium
 Data1: Californium
 Data1: Carbon
 Data1: Cerium
 Data1: Chlorine
 Data1: Chromium
 Data1: Cobalt
 Data1: Copper
 Data1: Curium
 Data1: Darmstadtium
 Data1: Dubnium
 Data1: Dysprosium
 Data1: Einsteinium
 Data1: Erbium
 Data1: Europium
 Data1: Fermium
 Data1: Fluorine
 Data1: Francium
 Data1: Gadolinium
 Data1: Gallium
 Data1: Germanium
 Data1: Gold
 Data1: Hafnium
 Data1: Hassium
 Data1: Helium
 Data1: Holmium
 Data1: Hydrogen
 Data1: Indium
 Data1: Iodine
 Data1: Iridium
 Data1: Iron
 Data1: Krypton
 Data1: Lanthanum
 Data1: Lawrencium
 Data1: Lead
 Data1: Lithium
 Data1: Lutetium
 Data1: Magnesium
 Data1: Manganese
 Data1: Meitnerium
 Data1: Mendelevium
 Data1: Mercury
 Data1: Molybdenum
 Data1: Neodymium
 Data1: Neon
 Data1: Neptunium
 Data1: Nickel
 Data1: Niobium
 Data1: Nitrogen
 Data1: Nobelium
 Data1: Osmium
 Data1: Oxygen
 Data1: Palladium
 Data1: Phosphorus
 Data1: Platinum
 Data1: Plutonium
 Data1: Polonium
 Data1: Potassium
 Data1: Praseodymium
 Data1: Promethium
 Data1: Protactinium
 Data1: Radium
 Data1: Radon
 Data1: Rhenium
 Data1: Rhodium
 Data1: Roentgenium
 Data1: Rubidium
 Data1: Ruthenium
 Data1: Rutherfordium
 Data1: Samarium
 Data1: Scandium
 Data1: Seaborgium
 Data1: Selenium
 Data1: Silicon
 Data1: Silver
 Data1: Sodium
 Data1: Strontium
 Data1: Sulfur
 Data1: Tantalum
 Data1: Technetium
 Data1: Tellurium
 Data1: Terbium
 Data1: Thallium
 Data1: Thorium
 Data1: Thulium
 Data1: Tin
 Data1: Titanium
 Data1: Tungsten
 Data1: Ununbium
 Data1: Ununhexium
 Data1: Ununoctium
 Data1: Ununpentium
 Data1: Ununquadium
 Data1: Ununseptium
 Data1: Ununtrium
 Data1: Uranium
 Data1: Vanadium
 Data1: Xenon
 Data1: Ytterbium
 Data1: Yttrium
 Data1: Zinc
 Data1: Zirconium
 Document: The Halogens (Group 17)
 Equation: Ideal gas law
 Glossary: Alloy
 Glossary: Boiling Point
 Glossary: Centigrade (celsius)
 Glossary: Enthalpy Change of Fusion (Heat of Fusion)
 Glossary: Enthalpy Change of Vapourisation
 Glossary: Fahrenheit
 Glossary: Halogens
 Glossary: Magnetic Ordering
 Glossary: Melting Point (freezing point)
 Glossary: Temperature
 Glossary: Transition Metals
 Production: Aluminium
 Production: Helium
 Production: Sodium
 Production: Technetium
 Reactions: Krypton
 Reactions: Osmium
 
pointed (2)
 Biography: Ida Eva Tacke Noddack
 Data1: Seaborgium
 
pointing (1)
 Glossary: Magnetic Ordering
 
points (23)
 Allotrope: Boron
 Allotrope: Ytterbium
 Biography: (Gabriel) Daniel Fahrenheit
 Compounds: Barium
 Data1: Iridium
 Data1: Osmium
 Data1: Rhodium
 Data1: Ruthenium
 Data1: Tantalum
 Data1: Thallium
 Data1: Thorium
 Data1: Tungsten
 Document: The Alkali (Group 1) Metals
 Document: The Lanthanoid Series
 Document: The Noble Gases (Group 18)
 Document: The Transition Metals (Groups 3 to 12)
 Glossary: Alkali Metal
 Glossary: Alkali Metal (alkaline-earth metals)
 Glossary: Lanthanides (old name)
 Glossary: Lanthanoids
 Glossary: Noble Gasses (inert gasses)
 On This Day... 30 October
 Production: Strontium
 
poisions (1)
 Data1: Arsenic
 
poison (9)
 Allotrope: Phosphorus
 Compounds: Barium
 Compounds: Nitrogen
 Data1: Arsenic
 Data1: Barium
 Data1: Radon
 Data1: Sodium
 Isotope: Xenon
 On This Day... 9 June
 
poisoning (9)
 Allotrope: Arsenic
 Biography: Robert Wilhelm Bunsen
 Compounds: Carbon
 Compounds: Sodium
 Data1: Antimony
 Data1: Arsenic
 Data1: Lead
 Data1: Polonium
 On This Day... 27 January
 
poisonings (1)
 Data1: Phosphorus
 
poisonous (15)
 Biography: Robert Wilhelm Bunsen
 Compounds: Nitrogen
 Compounds: Silver
 Compounds: Sodium
 Compounds: Vanadium
 Data1: Barium
 Data1: Cadmium
 Data1: Chromium
 Data1: Germanium
 Data1: Iodine
 Data1: Lead
 Data1: Plutonium
 Glossary: Atomic Charge
 Reactions: Lead
 Reactions: Thallium
 
poisons (4)
 Compounds: Sodium
 Data1: Arsenic
 Data1: Thallium
 Production: Arsenic
 
poisson (57)
 Data2: Aluminium
 Data2: Beryllium
 Data2: Bismuth
 Data2: Cadmium
 Data2: Calcium
 Data2: Cerium
 Data2: Chromium
 Data2: Cobalt
 Data2: Copper
 Data2: Dysprosium
 Data2: Erbium
 Data2: Europium
 Data2: Gadolinium
 Data2: Gold
 Data2: Hafnium
 Data2: Holmium
 Data2: Iridium
 Data2: Iron
 Data2: Lanthanum
 Data2: Lead
 Data2: Lutetium
 Data2: Magnesium
 Data2: Molybdenum
 Data2: Neodymium
 Data2: Nickel
 Data2: Niobium
 Data2: Osmium
 Data2: Palladium
 Data2: Platinum
 Data2: Plutonium
 Data2: Praseodymium
 Data2: Promethium
 Data2: Rhenium
 Data2: Rhodium
 Data2: Ruthenium
 Data2: Samarium
 Data2: Scandium
 Data2: Selenium
 Data2: Silver
 Data2: Strontium
 Data2: Tantalum
 Data2: Terbium
 Data2: Thallium
 Data2: Thorium
 Data2: Thulium
 Data2: Tin
 Data2: Titanium
 Data2: Tungsten
 Data2: Uranium
 Data2: Vanadium
 Data2: Ytterbium
 Data2: Yttrium
 Data2: Zinc
 Data2: Zirconium
 Glossary: Poisson Ratio
 Glossary: Young's Modulus
 On This Day... 21 June
 
poland (13)
 Biography: (Gabriel) Daniel Fahrenheit
 Biography: Irene Joliot-Curie
 Country: Algeria
 Country: Poland
 Country: United States of America
 Data1: Helium
 Data1: Magnesium
 Data1: Polonium
 Data1: Ruthenium
 Data1: Sodium
 Data1: Technetium
 Production: Helium
 Production: Sulfur
 
polar (2)
 Glossary: Electronegativity
 On This Day... 3 January
 
polarization (3)
 On This Day... 23 June
 On This Day... 26 May
 Reactions: Helium
 
polarography (1)
 On This Day... 11 February
 
pole (1)
 Isotope: Krypton
 
policed (1)
 Data1: Radon
 
policies (1)
 Biography: Pierre Curie
 
policy (1)
 Biography: Joseph Priestley
 
polinium (1)
 Data1: Technetium
 
polish (7)
 Compounds: Cerium
 Compounds: Iron
 Data1: Oxygen
 Data1: Ruthenium
 On This Day... 20 July
 On This Day... 28 May
 On This Day... 7 November
 
polished (3)
 Biography: Sir William Crookes
 Compounds: Titanium
 Data1: Tungsten
 
political (4)
 Biography: Frederick Soddy
 Biography: Pierre Curie
 Data1: Polonium
 Data1: Tungsten
 
pollucite (5)
 Country: Canada
 Data1: Caesium
 Data1: Rubidium
 Production: Caesium
 Production: Rubidium
 
pollutant (3)
 Allotrope: Oxygen
 Compounds: Carbon
 Compounds: Nitrogen
 
pollutants (2)
 Compounds: Mercury
 Compounds: Nitrogen
 
polluted (1)
 Production: Uranium
 
polluting (1)
 Data1: Mercury
 
pollution (3)
 Compounds: Calcium
 Data1: Hydrogen
 On This Day... 18 January
 
polonia (1)
 Data1: Polonium
 
polonij (1)
 Names: Polonium
 
polonio (1)
 Names: Polonium
 
polonium (17)
 Atomic data: Polonium
 Biography: Irene Joliot-Curie
 Biography: Marie Curie (Marya Sklodowska)
 Biography: Pierre Curie
 Compounds: Polonium
 Country: Russia
 Data1: Polonium
 Data1: Radon
 Data2: Polonium
 Data2: Ununhexium
 Isotope: Polonium
 MAC data: Polonium
 Names: Polonium
 Production: Polonium
 Reactions: Polonium
 Reactions: Ununhexium
 Spectrum: Polonium
 
polyanionic (1)
 Compounds: Ruthenium
 
polycarbonate (1)
 Compounds: Chlorine
 
polycrase (1)
 Production: Dysprosium
 
polycrystalline (2)
 Compounds: Barium
 Compounds: Silicon
 
polydimethylsiloxane (1)
 Compounds: Silicon
 
polyesters (1)
 Compounds: Lead
 
polyethylene (1)
 Compounds: Praseodymium
 
polyhalite (1)
 Production: Potassium
 
polymer (8)
 Compounds: Carbon
 Compounds: Hafnium
 Compounds: Silicon
 Compounds: Zinc
 Glossary: Poisson Ratio
 On This Day... 11 September
 On This Day... 3 May
 On This Day... 7 September
 
polymeric (1)
 Compounds: Plutonium
 
polymerization (4)
 Compounds: Sodium
 Data1: Germanium
 Data1: Lutetium
 On This Day... 26 February
 
polymers (7)
 Allotrope: Selenium
 Compounds: Antimony
 Compounds: Cadmium
 Glossary: Molecule
 On This Day... 11 September
 On This Day... 14 April
 On This Day... 26 February
 
polymorphic (1)
 Allotrope: Phosphorus
 
polypropylene (1)
 Glossary: Molecule
 
polystyrene (1)
 Glossary: Thermal Conductivity
 
polytechnique (4)
 Biography: Bernard Courtois
 Biography: Jean Charles Galissard de Marignac
 Biography: Joseph Louis Gay-Lussac
 Biography: Louis Jacques Thenard
 
polyurethane (1)
 Compounds: Chlorine
 
polyvinylchloride (1)
 On This Day... 11 September
 
pompeii (1)
 Data1: Cobalt
 
ponds (1)
 Data1: Copper
 
pondus (1)
 Glossary: pH
 
pontecorvo (1)
 On This Day... 22 August
 
pontin (1)
 Data1: Calcium
 
pool (3)
 Compounds: Calcium
 Data1: Scandium
 Data1: Tin
 
pooling (1)
 Production: Radon
 
pools (10)
 Compounds: Calcium
 Compounds: Chlorine
 Compounds: Sodium
 Country: Argentina
 Country: Chile
 Country: United States of America
 Data1: Bromine
 Document: The Halogens (Group 17)
 Glossary: Halogens
 Production: Lithium
 
poor (16)
 Allotrope: Carbon
 Biography: Dmitriy Ivanovich Mendeleyev
 Biography: Ferdinand Frederic Henri Moissan
 Biography: Ida Eva Tacke Noddack
 Biography: John William Strutt Rayleigh
 Biography: Karl Wilhelm Scheele
 Biography: Louis Jacques Thenard
 Biography: Michael Faraday
 Compounds: Arsenic
 Compounds: Gallium
 Compounds: Sulfur
 Data1: Antimony
 Data1: Boron
 Data1: Germanium
 Glossary: Non-Metals
 Production: Iron
 
poorly (2)
 Compounds: Silver
 Data1: Plutonium
 
pope (1)
 Biography: Julius Caesar Scaliger
 
pople (1)
 On This Day... 31 October
 
popov (2)
 On This Day... 16 March
 On This Day... 4 March
 
popova (1)
 Biography: Dmitriy Ivanovich Mendeleyev
 
popular (8)
 Biography: Joseph Priestley
 Biography: Julius Caesar Scaliger
 Biography: Robert Wilhelm Bunsen
 Compounds: Bismuth
 Compounds: Neodymium
 Data1: Praseodymium
 Data1: Radium
 Glossary: Fahrenheit
 
popularity (3)
 Biography: Julius Caesar Scaliger
 Compounds: Chromium
 Production: Indium
 
popularized (2)
 Allotrope: Carbon
 Biography: Michael Faraday
 
popularly (1)
 Glossary: Thermal Conductivity
 
porcelain (6)
 Biography: Jean Charles Galissard de Marignac
 Biography: Robert Wilhelm Bunsen
 Compounds: Barium
 Compounds: Phosphorus
 Compounds: Silicon
 On This Day... 4 May
 
pore (1)
 Compounds: Chlorine
 
pores (1)
 Compounds: Calcium
 
porous (1)
 Equation: Graham's Law
 
porphyry (2)
 Data1: Rhenium
 Production: Copper
 
portable (11)
 Biography: Joseph Louis Gay-Lussac
 Compounds: Bismuth
 Compounds: Tellurium
 Compounds: Thorium
 Data1: Thorium
 Data1: Thulium
 Data1: Ytterbium
 Document: The Actinoid Series
 Isotope: Gadolinium
 Isotope: Thulium
 Isotope: Ytterbium
 
porter (1)
 On This Day... 9 May
 
portion (5)
 Compounds: Chlorine
 Country: Outer space
 Data1: Osmium
 Data1: Silicon
 Production: Plutonium
 
portions (2)
 Biography: Jöns Jacob Berzelius
 Compounds: Calcium
 
portray (1)
 Biography: Jöns Jacob Berzelius
 
portugal (5)
 Country: Portugal
 Data1: Tantalum
 Data1: Tungsten
 Production: Tantalum
 Production: Tungsten
 
portugese (118)
 Names: Actinium
 Names: Aluminium
 Names: Americium
 Names: Antimony
 Names: Argon
 Names: Arsenic
 Names: Astatine
 Names: Barium
 Names: Berkelium
 Names: Beryllium
 Names: Bismuth
 Names: Bohrium
 Names: Boron
 Names: Bromine
 Names: Cadmium
 Names: Caesium
 Names: Calcium
 Names: Californium
 Names: Carbon
 Names: Cerium
 Names: Chlorine
 Names: Chromium
 Names: Cobalt
 Names: Copper
 Names: Curium
 Names: Darmstadtium
 Names: Dubnium
 Names: Dysprosium
 Names: Einsteinium
 Names: Erbium
 Names: Europium
 Names: Fermium
 Names: Fluorine
 Names: Francium
 Names: Gadolinium
 Names: Gallium
 Names: Germanium
 Names: Gold
 Names: Hafnium
 Names: Hassium
 Names: Helium
 Names: Holmium
 Names: Hydrogen
 Names: Indium
 Names: Iodine
 Names: Iridium
 Names: Iron
 Names: Krypton
 Names: Lanthanum
 Names: Lawrencium
 Names: Lead
 Names: Lithium
 Names: Lutetium
 Names: Magnesium
 Names: Manganese
 Names: Meitnerium
 Names: Mendelevium
 Names: Mercury
 Names: Molybdenum
 Names: Neodymium
 Names: Neon
 Names: Neptunium
 Names: Nickel
 Names: Niobium
 Names: Nitrogen
 Names: Nobelium
 Names: Osmium
 Names: Oxygen
 Names: Palladium
 Names: Phosphorus
 Names: Platinum
 Names: Plutonium
 Names: Polonium
 Names: Potassium
 Names: Praseodymium
 Names: Promethium
 Names: Protactinium
 Names: Radium
 Names: Radon
 Names: Rhenium
 Names: Rhodium
 Names: Roentgenium
 Names: Rubidium
 Names: Ruthenium
 Names: Rutherfordium
 Names: Samarium
 Names: Scandium
 Names: Seaborgium
 Names: Selenium
 Names: Silicon
 Names: Silver
 Names: Sodium
 Names: Strontium
 Names: Sulfur
 Names: Tantalum
 Names: Technetium
 Names: Tellurium
 Names: Terbium
 Names: Thallium
 Names: Thorium
 Names: Thulium
 Names: Tin
 Names: Titanium
 Names: Tungsten
 Names: Ununbium
 Names: Ununhexium
 Names: Ununoctium
 Names: Ununpentium
 Names: Ununquadium
 Names: Ununseptium
 Names: Ununtrium
 Names: Uranium
 Names: Vanadium
 Names: Xenon
 Names: Ytterbium
 Names: Yttrium
 Names: Zinc
 Names: Zirconium
 
pose (1)
 Data1: Argon
 
posed (1)
 Data1: Tantalum
 
poses (3)
 Compounds: Samarium
 Data1: Titanium
 Data1: Ytterbium
 
posible (1)
 Reactions: Iodine
 
posillipo (1)
 Data1: Uranium
 
position (11)
 Biography: Emilio Gino Segre
 Biography: Robert Wilhelm Bunsen
 Data1: Gallium
 Data1: Rhenium
 Document: The Transition Metals (Groups 3 to 12)
 Glossary: Energy Levels
 Glossary: Moh's Scale of Hardness
 Glossary: Wavefunction
 Reactions: Bromine
 Reactions: Chlorine
 Reactions: Iodine
 
positions (2)
 Allotrope: Carbon
 Biography: Emilio Gino Segre
 
positive (20)
 Allotrope: Carbon
 Biography: Jöns Jacob Berzelius
 Compounds: Barium
 Compounds: Hydrogen
 Compounds: Silver
 Data1: Gallium
 Data1: Selenium
 Document: The Alkali (Group 1) Metals
 Document: The Alkaline Earth Metals (Group 2)
 Glossary: Alkali Metal
 Glossary: Alkali Metal (alkaline-earth metals)
 Glossary: Anode
 Glossary: Antimatter
 Glossary: Atomic Charge
 Glossary: Ion
 Glossary: Magnetic Ordering
 Glossary: Oxidation State
 Glossary: Plasma
 Isotope: Plutonium
 Production: Aluminium
 
positively (9)
 Data1: Dubnium
 Data1: Fermium
 Data1: Rutherfordium
 Glossary: Atomic Charge
 Glossary: Beta Particle
 Glossary: Cation
 Glossary: Nucleus
 Glossary: Positron
 Glossary: Proton
 
positron (10)
 Glossary: Antimatter
 Glossary: Antiproton
 Glossary: Double Beta Decay
 Glossary: Double Electron Capture
 Glossary: Electron
 Glossary: Electron Capture
 Glossary: Positron
 Glossary: Positron Emission (Beta+ Decay)
 Isotope: Fluorine
 Production: Rhodium
 
positrons (5)
 Glossary: Antimatter
 Glossary: Beta Particle
 Glossary: Double Beta Decay
 Glossary: Positron Emission (Beta+ Decay)
 Isotope: Fluorine
 
posses (1)
 Data1: Lithium
 
posseses (1)
 Reactions: Platinum
 
possess (3)
 Document: The Actinoid Series
 Glossary: Actinides
 Glossary: Actinoids
 
possesses (3)
 Compounds: Lithium
 Compounds: Tantalum
 Glossary: Allotrope
 
possession (1)
 Production: Gold
 
possibilities (1)
 Biography: Ida Eva Tacke Noddack
 
possibility (4)
 Biography: Ida Eva Tacke Noddack
 Data1: Francium
 Glossary: Island of Stability
 Production: Uranium
 
possible (31)
 Biography: Ferdinand Frederic Henri Moissan
 Biography: Irene Joliot-Curie
 Biography: Philip Hauge Abelson
 Biography: Pierre Jules César Janssen
 Compounds: Cadmium
 Compounds: Hafnium
 Data1: Astatine
 Data1: Berkelium
 Data1: Helium
 Data1: Osmium
 Data1: Plutonium
 Data1: Praseodymium
 Data1: Ruthenium
 Data1: Titanium
 Data1: Tungsten
 Data1: Zirconium
 Document: Understanding Electron Configuration Tables
 Glossary: Atom
 Glossary: Brinell Hardness
 Glossary: Critical temperature
 Glossary: Double Beta Decay
 Glossary: Energy Levels
 Glossary: Enthalpy Change of Vapourisation
 Glossary: Island of Stability
 Glossary: Isotope
 Glossary: Spontaneous Fission
 Production: Osmium
 Production: Rhodium
 Production: Ruthenium
 Reactions: Helium
 Reactions: Sulfur
 
possibly (10)
 Biography: (Gabriel) Daniel Fahrenheit
 Biography: Pierre Curie
 Compounds: Lithium
 Compounds: Tantalum
 Country: Outer space
 Data1: Astatine
 Data1: Manganese
 Data1: Rutherfordium
 Data1: Xenon
 Production: Promethium
 
post (4)
 Biography: Dirk Coster
 Biography: Lise Meitner
 Biography: Pierre Curie
 Country: Outer space
 
posthumously (1)
 Biography: Henry Cavendish
 
postlewayt (1)
 Data1: Zinc
 
postoperative (1)
 Compounds: Copper
 
posts (2)
 Biography: Daniel Rutherford
 Biography: Jean Charles Galissard de Marignac
 
postulated (3)
 Biography: Ida Eva Tacke Noddack
 On This Day... 15 December
 Production: Nickel
 
postulates (1)
 Biography: Antoine-Laurent de Lavoisier
 
pot (1)
 Data1: Potassium
 
potash (7)
 Country: Canada
 Country: Germany
 Country: United States of America
 Data1: Neodymium
 Data1: Potassium
 On This Day... 4 May
 Production: Potassium
 
potasio (1)
 Names: Potassium
 
potassio (1)
 Names: Potassium
 
potassium (64)
 Atomic data: Potassium
 Biography: Antoine Alexandre Brutus Bussy
 Biography: Bernard Courtois
 Biography: Ferdinand Frederic Henri Moissan
 Biography: Robert Wilhelm Bunsen
 Compounds: Chlorine
 Compounds: Iodine
 Compounds: Magnesium
 Compounds: Potassium
 Compounds: Sodium
 Country: Canada
 Country: Germany
 Country: Oceans / Seas
 Country: United States of America
 Data1: Aluminium
 Data1: Argon
 Data1: Beryllium
 Data1: Erbium
 Data1: Hafnium
 Data1: Iodine
 Data1: Lithium
 Data1: Manganese
 Data1: Potassium
 Data1: Scandium
 Data1: Silicon
 Data1: Sulfur
 Data1: Tantalum
 Data1: Terbium
 Data1: Uranium
 Data1: Yttrium
 Data1: Zirconium
 Data2: Bromine
 Data2: Carbon
 Data2: Potassium
 Data2: Selenium
 Data2: Zirconium
 Document: Abundance of the Elements in the Solar System
 Document: Chemical makeup of the human body
 Document: The Alkali (Group 1) Metals
 Document: The Alkaline Earth Metals (Group 2)
 Glossary: Alkali Metal
 Glossary: Alkali Metal (alkaline-earth metals)
 Isotope: Potassium
 MAC data: Potassium
 Names: Potassium
 On This Day... 6 October
 On This Day... 9 October
 Production: Aluminium
 Production: Chlorine
 Production: Iodine
 Production: Lithium
 Production: Potassium
 Production: Rubidium
 Production: Strontium
 Production: Sulfur
 Production: Tantalum
 Production: Thallium
 Production: Uranium
 Reactions: Potassium
 Reactions: Rubidium
 Reactions: Sodium
 Reactions: Sulfur
 Reactions: Zinc
 Spectrum: Potassium
 
potato (1)
 Compounds: Sodium
 
potatoes (1)
 Compounds: Magnesium
 
potency (1)
 Data1: Arsenic
 
potent (3)
 Compounds: Sodium
 Data1: Fluorine
 Data1: Manganese
 
potential (127)
 Allotrope: Carbon
 Biography: John William Strutt Rayleigh
 Biography: Joseph Louis Gay-Lussac
 Compounds: Hafnium
 Compounds: Phosphorus
 Compounds: Tin
 Country: China
 Country: India
 Country: Turkey
 Data1: Actinium
 Data1: Lanthanum
 Data1: Promethium
 Data1: Radium
 Data1: Sulfur
 Data1: Uranium
 Data2: Actinium
 Data2: Aluminium
 Data2: Americium
 Data2: Antimony
 Data2: Argon
 Data2: Arsenic
 Data2: Astatine
 Data2: Barium
 Data2: Berkelium
 Data2: Beryllium
 Data2: Bismuth
 Data2: Boron
 Data2: Bromine
 Data2: Cadmium
 Data2: Caesium
 Data2: Calcium
 Data2: Californium
 Data2: Carbon
 Data2: Cerium
 Data2: Chlorine
 Data2: Chromium
 Data2: Cobalt
 Data2: Copper
 Data2: Curium
 Data2: Dysprosium
 Data2: Einsteinium
 Data2: Erbium
 Data2: Europium
 Data2: Fermium
 Data2: Fluorine
 Data2: Francium
 Data2: Gadolinium
 Data2: Gallium
 Data2: Germanium
 Data2: Gold
 Data2: Hafnium
 Data2: Helium
 Data2: Holmium
 Data2: Hydrogen
 Data2: Indium
 Data2: Iodine
 Data2: Iridium
 Data2: Iron
 Data2: Krypton
 Data2: Lanthanum
 Data2: Lead
 Data2: Lithium
 Data2: Lutetium
 Data2: Magnesium
 Data2: Manganese
 Data2: Mendelevium
 Data2: Mercury
 Data2: Molybdenum
 Data2: Neodymium
 Data2: Neon
 Data2: Neptunium
 Data2: Nickel
 Data2: Niobium
 Data2: Nitrogen
 Data2: Nobelium
 Data2: Osmium
 Data2: Oxygen
 Data2: Palladium
 Data2: Phosphorus
 Data2: Platinum
 Data2: Plutonium
 Data2: Polonium
 Data2: Potassium
 Data2: Praseodymium
 Data2: Promethium
 Data2: Protactinium
 Data2: Radium
 Data2: Radon
 Data2: Rhenium
 Data2: Rhodium
 Data2: Rubidium
 Data2: Ruthenium
 Data2: Samarium
 Data2: Scandium
 Data2: Selenium
 Data2: Silicon
 Data2: Silver
 Data2: Sodium
 Data2: Strontium
 Data2: Sulfur
 Data2: Tantalum
 Data2: Technetium
 Data2: Tellurium
 Data2: Terbium
 Data2: Thallium
 Data2: Thorium
 Data2: Thulium
 Data2: Tin
 Data2: Titanium
 Data2: Tungsten
 Data2: Uranium
 Data2: Vanadium
 Data2: Xenon
 Data2: Ytterbium
 Data2: Yttrium
 Data2: Zinc
 Data2: Zirconium
 Glossary: Electron Volt
 Glossary: Ionization Potential
 Glossary: pH
 Glossary: Valence Electron Potential
 Isotope: Plutonium
 Isotope: Thulium
 On This Day... 18 February
 Production: Boron
 Production: Lanthanum
 Reactions: Helium
 
potentially (9)
 Allotrope: Carbon
 Data1: Copper
 Data1: Nitrogen
 Data1: Radon
 Document: The Halogens (Group 17)
 Glossary: Alpha Decay
 Glossary: Halogens
 Production: Manganese
 Production: Thallium
 
potentials (67)
 Reactions: Aluminium
 Reactions: Antimony
 Reactions: Arsenic
 Reactions: Barium
 Reactions: Beryllium
 Reactions: Bismuth
 Reactions: Boron
 Reactions: Bromine
 Reactions: Cadmium
 Reactions: Caesium
 Reactions: Calcium
 Reactions: Carbon
 Reactions: Cerium
 Reactions: Chlorine
 Reactions: Chromium
 Reactions: Cobalt
 Reactions: Copper
 Reactions: Fluorine
 Reactions: Gallium
 Reactions: Germanium
 Reactions: Gold
 Reactions: Hafnium
 Reactions: Hydrogen
 Reactions: Indium
 Reactions: Iodine
 Reactions: Iridium
 Reactions: Iron
 Reactions: Lanthanum
 Reactions: Lead
 Reactions: Lithium
 Reactions: Magnesium
 Reactions: Manganese
 Reactions: Mercury
 Reactions: Molybdenum
 Reactions: Nickel
 Reactions: Niobium
 Reactions: Nitrogen
 Reactions: Osmium
 Reactions: Oxygen
 Reactions: Palladium
 Reactions: Phosphorus
 Reactions: Platinum
 Reactions: Plutonium
 Reactions: Potassium
 Reactions: Radium
 Reactions: Rhenium
 Reactions: Rhodium
 Reactions: Rubidium
 Reactions: Ruthenium
 Reactions: Scandium
 Reactions: Selenium
 Reactions: Silicon
 Reactions: Silver
 Reactions: Sodium
 Reactions: Strontium
 Reactions: Sulfur
 Reactions: Tantalum
 Reactions: Tellurium
 Reactions: Thallium
 Reactions: Thorium
 Reactions: Tin
 Reactions: Titanium
 Reactions: Tungsten
 Reactions: Uranium
 Reactions: Vanadium
 Reactions: Zinc
 Reactions: Zirconium
 
potentiometer (1)
 Biography: John William Strutt Rayleigh
 
potentiometric (1)
 On This Day... 27 January
 
potted (1)
 Compounds: Magnesium
 
pottery (7)
 Compounds: Antimony
 Compounds: Barium
 Compounds: Boron
 Compounds: Silver
 Compounds: Sodium
 Data1: Antimony
 Data1: Uranium
 
poudre (1)
 On This Day... 7 September
 
poultry (1)
 Compounds: Sodium
 
pound (7)
 Data1: Neodymium
 Data1: Scandium
 Glossary: Enthalpy Change of Vapourisation
 Production: Beryllium
 Production: Copper
 Production: Lithium
 Production: Tellurium
 
pounding (1)
 Data1: Xenon
 
pounds (5)
 Biography: William Hyde Wollaston
 Data1: Europium
 Data1: Gold
 Glossary: Young's Modulus
 Production: Oxygen
 
pouring (1)
 Glossary: Viscosity
 
pouvoir (1)
 Glossary: pH
 
powder (57)
 Allotrope: Boron
 Allotrope: Carbon
 Compounds: Barium
 Compounds: Boron
 Compounds: Calcium
 Compounds: Chlorine
 Compounds: Cobalt
 Compounds: Dysprosium
 Compounds: Hafnium
 Compounds: Iron
 Compounds: Lead
 Compounds: Magnesium
 Compounds: Tantalum
 Compounds: Titanium
 Compounds: Vanadium
 Compounds: Zinc
 Compounds: Zirconium
 Data1: Aluminium
 Data1: Antimony
 Data1: Bismuth
 Data1: Caesium
 Data1: Gadolinium
 Data1: Indium
 Data1: Iridium
 Data1: Iron
 Data1: Lead
 Data1: Magnesium
 Data1: Nickel
 Data1: Osmium
 Data1: Palladium
 Data1: Rhenium
 Data1: Rhodium
 Data1: Silicon
 Data1: Sodium
 Data1: Sulfur
 Data1: Terbium
 Data1: Tin
 Data1: Titanium
 Data1: Uranium
 Data1: Vanadium
 Data1: Zinc
 Data1: Zirconium
 Data2: Hafnium
 Data2: Molybdenum
 Data2: Silicon
 On This Day... 24 March
 On This Day... 7 September
 Production: Aluminium
 Production: Antimony
 Production: Ruthenium
 Production: Tellurium
 Production: Uranium
 Production: Yttrium
 Production: Zirconium
 Reactions: Iron
 Reactions: Rhenium
 Reactions: Technetium
 
powdered (12)
 Compounds: Molybdenum
 Compounds: Silicon
 Data1: Aluminium
 Data1: Chromium
 Data1: Cobalt
 Data1: Copper
 Data1: Sodium
 Data1: Vanadium
 Data2: Iodine
 Glossary: Pyrophoric
 Reactions: Beryllium
 Reactions: Boron
 
powders (6)
 Compounds: Hafnium
 Compounds: Magnesium
 Compounds: Phosphorus
 Compounds: Sodium
 Data1: Copper
 Data1: Europium
 
powellite (1)
 Production: Molybdenum
 
power (34)
 Biography: Arthur Jeffrey Dempster
 Biography: John Dalton
 Biography: Joseph Louis Gay-Lussac
 Compounds: Bismuth
 Compounds: Boron
 Compounds: Fluorine
 Compounds: Iodine
 Compounds: Lithium
 Compounds: Nitrogen
 Compounds: Silicon
 Compounds: Tellurium
 Data1: Actinium
 Data1: Curium
 Data1: Fluorine
 Data1: Helium
 Data1: Hydrogen
 Data1: Indium
 Data1: Promethium
 Data1: Radon
 Data1: Scandium
 Data1: Tantalum
 Data1: Tellurium
 Data1: Thulium
 Data1: Zirconium
 Glossary: pH
 Isotope: Caesium
 Isotope: Plutonium
 Isotope: Polonium
 Isotope: Strontium
 On This Day... 17 December
 Production: Aluminium
 Production: Fluorine
 Production: Radon
 Production: Zinc
 
powered (1)
 Isotope: Hydrogen
 
powerful (12)
 Allotrope: Oxygen
 Biography: Antoine-Laurent de Lavoisier
 Compounds: Neodymium
 Compounds: Nitrogen
 Compounds: Potassium
 Compounds: Samarium
 Compounds: Zinc
 Data1: Bromine
 Data1: Cobalt
 Data1: Neodymium
 Data1: Xenon
 Glossary: Gamma Ray
 
powerfully (2)
 Compounds: Dysprosium
 Compounds: Holmium
 
powering (1)
 Country: Outer space
 
powers (1)
 Data1: Radium
 
poysdorf (1)
 Biography: Franz-Joseph Muller Freiherr von Reichenstein
 
ppb (43)
 Data1: Aluminium
 Data1: Arsenic
 Data1: Barium
 Data1: Beryllium
 Data1: Boron
 Data1: Bromine
 Data1: Cadmium
 Data1: Caesium
 Data1: Calcium
 Data1: Carbon
 Data1: Chlorine
 Data1: Chromium
 Data1: Cobalt
 Data1: Copper
 Data1: Fluorine
 Data1: Gold
 Data1: Hydrogen
 Data1: Iodine
 Data1: Iron
 Data1: Lead
 Data1: Lithium
 Data1: Magnesium
 Data1: Manganese
 Data1: Molybdenum
 Data1: Nickel
 Data1: Nitrogen
 Data1: Oxygen
 Data1: Phosphorus
 Data1: Potassium
 Data1: Radium
 Data1: Rubidium
 Data1: Selenium
 Data1: Silicon
 Data1: Sodium
 Data1: Strontium
 Data1: Sulfur
 Data1: Tin
 Data1: Uranium
 Data1: Vanadium
 Data1: Zinc
 Data1: Zirconium
 Production: Platinum
 Production: Rhenium
 
ppm (107)
 Country: Canada
 Country: Democratic Republic of Congo
 Country: Israel
 Country: Jordan
 Country: Outer space
 Data1: Aluminium
 Data1: Antimony
 Data1: Argon
 Data1: Arsenic
 Data1: Barium
 Data1: Beryllium
 Data1: Bismuth
 Data1: Boron
 Data1: Bromine
 Data1: Cadmium
 Data1: Caesium
 Data1: Calcium
 Data1: Carbon
 Data1: Cerium
 Data1: Chlorine
 Data1: Chromium
 Data1: Cobalt
 Data1: Copper
 Data1: Dysprosium
 Data1: Erbium
 Data1: Europium
 Data1: Fluorine
 Data1: Gadolinium
 Data1: Gallium
 Data1: Germanium
 Data1: Gold
 Data1: Hafnium
 Data1: Helium
 Data1: Holmium
 Data1: Hydrogen
 Data1: Indium
 Data1: Iodine
 Data1: Iridium
 Data1: Iron
 Data1: Krypton
 Data1: Lanthanum
 Data1: Lead
 Data1: Lithium
 Data1: Lutetium
 Data1: Magnesium
 Data1: Manganese
 Data1: Mercury
 Data1: Molybdenum
 Data1: Neodymium
 Data1: Neon
 Data1: Nickel
 Data1: Niobium
 Data1: Nitrogen
 Data1: Osmium
 Data1: Oxygen
 Data1: Palladium
 Data1: Phosphorus
 Data1: Platinum
 Data1: Polonium
 Data1: Potassium
 Data1: Praseodymium
 Data1: Protactinium
 Data1: Radium
 Data1: Radon
 Data1: Rhenium
 Data1: Rhodium
 Data1: Rubidium
 Data1: Ruthenium
 Data1: Samarium
 Data1: Scandium
 Data1: Selenium
 Data1: Silicon
 Data1: Silver
 Data1: Sodium
 Data1: Strontium
 Data1: Sulfur
 Data1: Tantalum
 Data1: Tellurium
 Data1: Terbium
 Data1: Thallium
 Data1: Thorium
 Data1: Thulium
 Data1: Tin
 Data1: Titanium
 Data1: Tungsten
 Data1: Uranium
 Data1: Vanadium
 Data1: Xenon
 Data1: Ytterbium
 Data1: Yttrium
 Data1: Zinc
 Data1: Zirconium
 Isotope: Helium
 Production: Bromine
 Production: Copper
 Production: Gallium
 Production: Gold
 Production: Indium
 Production: Krypton
 Production: Lanthanum
 Production: Lithium
 Production: Platinum
 Production: Praseodymium
 Production: Protactinium
 Production: Tellurium
 Production: Thorium
 Production: Tin
 
pr (7)
 Atomic data: Praseodymium
 Data1: Neodymium
 Data1: Praseodymium
 Isotope: Cerium
 Isotope: Praseodymium
 Reactions: Praseodymium
 Spectrum: Praseodymium
 
pr+ (1)
 Atomic data: Praseodymium
 
pr+3 (1)
 Data2: Praseodymium
 
pr+4 (1)
 Data2: Praseodymium
 
pr3+ (1)
 Reactions: Praseodymium
 
pr6o11 (2)
 Compounds: Praseodymium
 Reactions: Praseodymium
 
practical (10)
 Biography: Jean Charles Galissard de Marignac
 Biography: Sir William Crookes
 Biography: William Hyde Wollaston
 Compounds: Selenium
 Data1: Lanthanum
 Data1: Sulfur
 Document: The Alkali (Group 1) Metals
 Glossary: Poisson Ratio
 On This Day... 23 January
 On This Day... 6 January
 
practically (2)
 Country: Russia
 Production: Silicon
 
practice (8)
 Biography: Karl Wilhelm Scheele
 Compounds: Silicon
 Data1: Mercury
 Glossary: Alloy
 Glossary: Spontaneous Fission
 On This Day... 26 June
 Reactions: Rhenium
 Reactions: Technetium
 
practiced (1)
 Biography: William Hyde Wollaston
 
prasemit (1)
 Data1: Praseodymium
 
praseodimij (1)
 Names: Praseodymium
 
praseodimio (1)
 Names: Praseodymium
 
praseodym (1)
 Names: Praseodymium
 
praseodyme (1)
 Names: Praseodymium
 
praseodymium (19)
 Atomic data: Praseodymium
 Biography: Carl Auer Baron von Welsbach
 Biography: Carl Gustav Mosander
 Biography: Per Teodor Cleve
 Compounds: Praseodymium
 Data1: Lanthanum
 Data1: Neodymium
 Data1: Praseodymium
 Data2: Praseodymium
 Document: Abundance of the Elements in the Solar System
 Document: The Lanthanoid Series
 Glossary: Rare Earth Elements
 Isotope: Praseodymium
 MAC data: Praseodymium
 Names: Praseodymium
 On This Day... 9 September
 Production: Praseodymium
 Reactions: Praseodymium
 Spectrum: Praseodymium
 
prasios (1)
 Data1: Praseodymium
 
prata (1)
 Names: Silver
 
pratique (1)
 Biography: Louis Jacques Thenard
 
prbr3 (1)
 Reactions: Praseodymium
 
prcl3 (2)
 Compounds: Praseodymium
 Reactions: Praseodymium
 
pre (4)
 Biography: Antoine-Laurent de Lavoisier
 Country: Colombia
 Data1: Platinum
 Data1: Tin
 
precaution (1)
 Data1: Iodine
 
precautions (3)
 Data1: Boron
 Data1: Phosphorus
 Document: The Alkali (Group 1) Metals
 
precedent (1)
 Data1: Seaborgium
 
preceding (2)
 Data1: Copper
 Data1: Iron
 
precious (15)
 Compounds: Sodium
 Data1: Aluminium
 Data1: Beryllium
 Data1: Chromium
 Data1: Gold
 Data1: Iridium
 Data1: Osmium
 Data1: Palladium
 Data1: Platinum
 Data1: Rhodium
 Data1: Ruthenium
 Data1: Silver
 Production: Aluminium
 Production: Beryllium
 Production: Tellurium
 
precipitate (4)
 Biography: Ferdinand Reich
 Compounds: Aluminium
 Data1: Terbium
 Data1: Uranium
 
precipitated (6)
 Biography: George Charles de Hevesy
 Data1: Phosphorus
 Data1: Rhodium
 Production: Cadmium
 Production: Helium
 Production: Thorium
 
precipitating (3)
 Biography: Robert Wilhelm Bunsen
 Data1: Francium
 Data1: Palladium
 
precipitation (3)
 Data1: Lanthanum
 On This Day... 10 January
 Production: Uranium
 
precipitator (1)
 On This Day... 10 January
 
precise (4)
 Biography: John William Strutt Rayleigh
 Biography: Joseph Louis Gay-Lussac
 Compounds: Germanium
 Reactions: Zinc
 
precisely (2)
 Biography: John Dalton
 Glossary: Temperature
 
precision (3)
 Biography: John William Strutt Rayleigh
 Biography: Philip Hauge Abelson
 Compounds: Titanium
 
precursor (3)
 Compounds: Boron
 Compounds: Lithium
 Data1: Phosphorus
 
precursors (1)
 Allotrope: Carbon
 
predecessor (1)
 Compounds: Strontium
 
predict (7)
 Country: United States of America
 Data1: Neodymium
 Data1: Scandium
 Equation: Boyle's Law
 Glossary: Half Life
 Glossary: Magic Number
 Glossary: Young's Modulus
 
predictable (1)
 Isotope: Cobalt
 
predicted (25)
 Biography: Clemens Alexander Winkler
 Biography: Dmitriy Ivanovich Mendeleyev
 Biography: Per Teodor Cleve
 Country: Algeria
 Country: Qatar
 Country: Russia
 Data1: Bismuth
 Data1: Gallium
 Data1: Germanium
 Data1: Hafnium
 Data1: Neodymium
 Data1: Neptunium
 Data1: Plutonium
 Data1: Promethium
 Data1: Protactinium
 Data1: Rhenium
 Data1: Technetium
 Data2: Hassium
 Data2: Rutherfordium
 Data2: Seaborgium
 Glossary: Double Beta Decay
 Glossary: Magic Number
 Isotope: Bismuth
 Isotope: Hassium
 On This Day... 8 May
 
prediction (5)
 Biography: Dmitriy Ivanovich Mendeleyev
 Data1: Hafnium
 Data1: Promethium
 Data1: Radon
 Data1: Scandium
 
predictions (3)
 Data1: Technetium
 Glossary: Double Electron Capture
 Glossary: Magic Number
 
predicts (1)
 On This Day... 4 February
 
predominant (1)
 Production: Antimony
 
predominantly (1)
 Glossary: Alloy
 
prefer (1)
 Production: Yttrium
 
preferably (1)
 Reactions: Selenium
 
preferentially (1)
 Isotope: Strontium
 
preferred (11)
 Biography: Antoine-Jerome Balard
 Biography: Joseph Louis Gay-Lussac
 Data1: Helium
 Data1: Lawrencium
 Data1: Xenon
 Document: The Alkali (Group 1) Metals
 Document: The Alkaline Earth Metals (Group 2)
 Glossary: Alkali Metal
 Glossary: Alkali Metal (alkaline-earth metals)
 Glossary: Goldschmidt Classification
 Reactions: Uranium
 
pregl (1)
 On This Day... 3 September
 
pregnant (1)
 Data1: Nitrogen
 
prehistoric (3)
 Data1: Gold
 Data1: Manganese
 Data1: Zinc
 
prehistory (2)
 Data1: Carbon
 Data1: Iron
 
prejudice (2)
 Biography: Joseph Priestley
 Biography: Lise Meitner
 
preliminary (3)
 Biography: Pierre Jules César Janssen
 Biography: Robert Wilhelm Bunsen
 Data1: Lawrencium
 
preload (1)
 Glossary: Brinell Hardness
 
premature (2)
 Compounds: Copper
 Data1: Radium
 
premix (1)
 Biography: Robert Wilhelm Bunsen
 
preparation (12)
 Allotrope: Carbon
 Biography: Johann Schroder
 Compounds: Aluminium
 Compounds: Barium
 Compounds: Caesium
 Compounds: Calcium
 Compounds: Europium
 Compounds: Iodine
 Compounds: Magnesium
 Compounds: Radium
 Compounds: Titanium
 Data1: Phosphorus
 
preparations (1)
 Compounds: Sodium
 
prepare (10)
 Compounds: Europium
 Data1: Einsteinium
 Data1: Lutetium
 Data1: Niobium
 Data1: Promethium
 On This Day... 11 March
 Production: Boron
 Production: Einsteinium
 Production: Lutetium
 Reactions: Iron
 
prepared (41)
 Allotrope: Carbon
 Biography: Joseph Priestley
 Biography: Michael Faraday
 Compounds: Magnesium
 Compounds: Radium
 Compounds: Xenon
 Data1: Calcium
 Data1: Darmstadtium
 Data1: Fluorine
 Data1: Francium
 Data1: Germanium
 Data1: Hafnium
 Data1: Hassium
 Data1: Magnesium
 Data1: Neon
 Data1: Protactinium
 Data1: Rhenium
 Data1: Samarium
 Data1: Scandium
 Data1: Silicon
 Data1: Sodium
 Data1: Titanium
 Data1: Zirconium
 Document: The Noble Gases (Group 18)
 Glossary: Alkali Metal
 Glossary: Noble Gasses (inert gasses)
 On This Day... 11 September
 On This Day... 16 February
 On This Day... 4 January
 Production: Actinium
 Production: Boron
 Production: Cerium
 Production: Fluorine
 Production: Gadolinium
 Production: Hydrogen
 Production: Iodine
 Production: Rhenium
 Production: Samarium
 Production: Sodium
 Production: Strontium
 Reactions: Uranium
 
preparing (5)
 Biography: Antoine Alexandre Brutus Bussy
 Biography: Ferdinand Frederic Henri Moissan
 Data1: Arsenic
 Data1: Neodymium
 Reactions: Uranium
 
presaged (1)
 Biography: Ida Eva Tacke Noddack
 
presbyterian (1)
 Biography: Joseph Priestley
 
prescott (2)
 Country: Oceans / Seas
 Production: Gold
 
prescribed (1)
 Data1: Palladium
 
presence (38)
 Allotrope: Arsenic
 Allotrope: Plutonium
 Biography: Clemens Alexander Winkler
 Biography: Friedrich Ernst Dorn
 Biography: Joseph Louis Gay-Lussac
 Biography: Morris Travers
 Biography: Philip Hauge Abelson
 Compounds: Copper
 Compounds: Lead
 Compounds: Phosphorus
 Compounds: Tin
 Country: Outer space
 Data1: Argon
 Data1: Arsenic
 Data1: Bromine
 Data1: Carbon
 Data1: Manganese
 Data1: Oxygen
 Data1: Rhenium
 Data1: Rutherfordium
 Data1: Sulfur
 Data1: Technetium
 Data1: Thallium
 Data1: Titanium
 Glossary: Absorption Spectrum
 Glossary: Halogens
 Glossary: Magnetic Ordering
 Glossary: Refractory
 Isotope: Carbon
 Isotope: Plutonium
 Production: Astatine
 Production: Cadmium
 Production: Hydrogen
 Production: Technetium
 Reactions: Bismuth
 Reactions: Iodine
 Reactions: Ruthenium
 Reactions: Sulfur
 
present (59)
 Allotrope: Carbon
 Allotrope: Oxygen
 Biography: Lise Meitner
 Biography: Michael Faraday
 Biography: Philip Hauge Abelson
 Biography: Robert Wilhelm Bunsen
 Biography: Sir Humphry Davy
 Compounds: Boron
 Compounds: Carbon
 Compounds: Nitrogen
 Country: Canada
 Country: Oceans / Seas
 Country: Outer space
 Data1: Actinium
 Data1: Antimony
 Data1: Argon
 Data1: Carbon
 Data1: Cerium
 Data1: Copper
 Data1: Darmstadtium
 Data1: Dubnium
 Data1: Fluorine
 Data1: Francium
 Data1: Hassium
 Data1: Helium
 Data1: Krypton
 Data1: Manganese
 Data1: Neon
 Data1: Phosphorus
 Data1: Praseodymium
 Data1: Radon
 Data1: Ruthenium
 Data1: Rutherfordium
 Data1: Seaborgium
 Data1: Selenium
 Data1: Technetium
 Data1: Vanadium
 Data1: Xenon
 Glossary: Absorption Spectrum
 Glossary: Compound
 Glossary: Periods
 Glossary: Teratogenic
 Glossary: Transactinides
 Isotope: Plutonium
 Production: Aluminium
 Production: Carbon
 Production: Fluorine
 Production: Iron
 Production: Lead
 Production: Nitrogen
 Production: Platinum
 Production: Plutonium
 Production: Potassium
 Production: Sulfur
 Production: Technetium
 Production: Titanium
 Production: Vanadium
 Reactions: Iron
 Reactions: Zinc
 
presentation (2)
 Biography: Dmitriy Ivanovich Mendeleyev
 Glossary: Periodic Table
 
presented (9)
 Biography: John Dalton
 Biography: Robert Wilhelm Bunsen
 Data1: Lanthanum
 On This Day... 10 December
 On This Day... 14 October
 On This Day... 15 January
 On This Day... 19 September
 On This Day... 21 October
 On This Day... 27 January
 
presently (3)
 Data1: Selenium
 Glossary: Element
 Production: Cerium
 
presents (9)
 Data1: Argon
 Data1: Cerium
 Data1: Erbium
 Data1: Europium
 Data1: Lanthanum
 Data1: Phosphorus
 Data1: Scandium
 Data1: Thulium
 Data1: Uranium
 
preservation (2)
 Compounds: Potassium
 Data1: Nitrogen
 
preservative (7)
 Compounds: Arsenic
 Compounds: Potassium
 Compounds: Sodium
 Compounds: Sulfur
 Compounds: Zinc
 Data1: Sulfur
 Data1: Zinc
 
preservatives (2)
 Compounds: Potassium
 Data1: Arsenic
 
preserved (5)
 Compounds: Potassium
 Compounds: Sodium
 Data1: Copper
 Data1: Thallium
 Isotope: Magnesium
 
preserves (1)
 Compounds: Sodium
 
preserving (3)
 Compounds: Magnesium
 Compounds: Sodium
 Compounds: Zinc
 
president (3)
 Biography: Dale R. Corson
 Biography: Louis Jacques Thenard
 Biography: Philip Hauge Abelson
 
press (2)
 Biography: Pierre Curie
 On This Day... 24 November
 
pressed (3)
 Biography: Robert Wilhelm Bunsen
 Compounds: Hafnium
 Data1: Magnesium
 
pressing (1)
 Compounds: Hafnium
 
pressue (1)
 Data1: Scandium
 
pressure (180)
 Allotrope: Arsenic
 Allotrope: Oxygen
 Allotrope: Phosphorus
 Allotrope: Plutonium
 Allotrope: Sulfur
 Biography: (Gabriel) Daniel Fahrenheit
 Biography: Ferdinand Frederic Henri Moissan
 Biography: John Dalton
 Biography: Robert Wilhelm Bunsen
 Biography: Sir William Crookes
 Compounds: Boron
 Compounds: Hafnium
 Compounds: Helium
 Compounds: Rhenium
 Country: Outer space
 Data1: Actinium
 Data1: Fermium
 Data1: Helium
 Data1: Hydrogen
 Data1: Lanthanum
 Data1: Nitrogen
 Data1: Osmium
 Data1: Tungsten
 Data1: Xenon
 Data1: Yttrium
 Data2: Actinium
 Data2: Aluminium
 Data2: Americium
 Data2: Antimony
 Data2: Argon
 Data2: Arsenic
 Data2: Astatine
 Data2: Barium
 Data2: Berkelium
 Data2: Beryllium
 Data2: Bismuth
 Data2: Bohrium
 Data2: Boron
 Data2: Bromine
 Data2: Cadmium
 Data2: Caesium
 Data2: Calcium
 Data2: Californium
 Data2: Carbon
 Data2: Cerium
 Data2: Chlorine
 Data2: Chromium
 Data2: Cobalt
 Data2: Copper
 Data2: Curium
 Data2: Darmstadtium
 Data2: Dubnium
 Data2: Dysprosium
 Data2: Einsteinium
 Data2: Erbium
 Data2: Europium
 Data2: Fermium
 Data2: Fluorine
 Data2: Francium
 Data2: Gadolinium
 Data2: Gallium
 Data2: Germanium
 Data2: Gold
 Data2: Hafnium
 Data2: Hassium
 Data2: Helium
 Data2: Holmium
 Data2: Hydrogen
 Data2: Indium
 Data2: Iodine
 Data2: Iridium
 Data2: Iron
 Data2: Krypton
 Data2: Lanthanum
 Data2: Lawrencium
 Data2: Lead
 Data2: Lithium
 Data2: Lutetium
 Data2: Magnesium
 Data2: Manganese
 Data2: Meitnerium
 Data2: Mendelevium
 Data2: Mercury
 Data2: Molybdenum
 Data2: Neodymium
 Data2: Neon
 Data2: Neptunium
 Data2: Nickel
 Data2: Niobium
 Data2: Nitrogen
 Data2: Nobelium
 Data2: Osmium
 Data2: Oxygen
 Data2: Palladium
 Data2: Phosphorus
 Data2: Platinum
 Data2: Plutonium
 Data2: Polonium
 Data2: Potassium
 Data2: Praseodymium
 Data2: Promethium
 Data2: Protactinium
 Data2: Radium
 Data2: Radon
 Data2: Rhenium
 Data2: Rhodium
 Data2: Roentgenium
 Data2: Rubidium
 Data2: Ruthenium
 Data2: Rutherfordium
 Data2: Samarium
 Data2: Scandium
 Data2: Seaborgium
 Data2: Selenium
 Data2: Silicon
 Data2: Silver
 Data2: Sodium
 Data2: Strontium
 Data2: Sulfur
 Data2: Tantalum
 Data2: Technetium
 Data2: Tellurium
 Data2: Terbium
 Data2: Thallium
 Data2: Thorium
 Data2: Thulium
 Data2: Tin
 Data2: Titanium
 Data2: Tungsten
 Data2: Ununbium
 Data2: Ununhexium
 Data2: Ununoctium
 Data2: Ununpentium
 Data2: Ununquadium
 Data2: Ununseptium
 Data2: Ununtrium
 Data2: Uranium
 Data2: Vanadium
 Data2: Xenon
 Data2: Ytterbium
 Data2: Yttrium
 Data2: Zinc
 Data2: Zirconium
 Document: The Alkali (Group 1) Metals
 Equation: Avogadro's law
 Equation: Boyle's Law
 Equation: Charles' Law
 Equation: Combined Gas Law
 Equation: Henry's Law
 Equation: Ideal gas law
 Equation: Osmotic pressure
 Equation: Total gas pressure as sum of partial pressures
 Equation: Van der Waals equation
 Glossary: Alkali Metal
 Glossary: Boiling Point
 Glossary: Bulk Modulus
 Glossary: Critical temperature
 Glossary: Gas
 Glossary: Halogens
 Glossary: Ideal Gas
 Glossary: Melting Point (freezing point)
 Glossary: Shear Modulus
 Glossary: Standard Temperature and Pressure (STP)
 Glossary: Temperature
 Glossary: Young's Modulus
 On This Day... 10 May
 On This Day... 12 December
 On This Day... 14 October
 On This Day... 21 April
 On This Day... 8 October
 Production: Fermium
 Production: Helium
 Production: Vanadium
 Reactions: Chlorine
 Reactions: Fluorine
 Reactions: Osmium
 Reactions: Oxygen
 Reactions: Rhenium
 Reactions: Uranium
 Reactions: Xenon
 
pressures (9)
 Allotrope: Phosphorus
 Compounds: Boron
 Compounds: Carbon
 Compounds: Rhenium
 Data1: Hydrogen
 Equation: Boyle's Law
 Equation: Ideal gas law
 Equation: Total gas pressure as sum of partial pressures
 On This Day... 9 December
 
pressurized (1)
 Isotope: Boron
 
pressurizing (1)
 Allotrope: Oxygen
 
prestige (1)
 Data1: Gold
 
prestigious (2)
 Data1: Ununpentium
 Data1: Ununtrium
 
presumably (20)
 Country: Outer space
 Data1: Bohrium
 Data1: Fermium
 Data1: Hassium
 Data1: Lawrencium
 Data1: Meitnerium
 Data1: Mendelevium
 Data1: Nobelium
 Data1: Rhodium
 Data1: Roentgenium
 Data1: Rutherfordium
 Data1: Ununbium
 Data1: Ununhexium
 Data1: Ununoctium
 Data1: Ununpentium
 Data1: Ununquadium
 Data1: Ununseptium
 Data1: Ununtrium
 Production: Neon
 Reactions: Zirconium
 
presumed (1)
 Biography: Ida Eva Tacke Noddack
 
prevalence (1)
 Glossary: Abundance
 
prevalent (1)
 Compounds: Sodium
 
prevent (10)
 Allotrope: Carbon
 Compounds: Iodine
 Compounds: Potassium
 Compounds: Sodium
 Compounds: Sulfur
 Data1: Magnesium
 Data1: Rhodium
 Data1: Zinc
 Document: The Alkali (Group 1) Metals
 Glossary: Thermal Conductivity
 
prevented (2)
 Allotrope: Tin
 Data1: Platinum
 
preventing (5)
 Biography: Karl Wilhelm Scheele
 Compounds: Lanthanum
 Compounds: Magnesium
 Compounds: Sodium
 Glossary: Double Beta Decay
 
prevention (2)
 Compounds: Phosphorus
 Data1: Selenium
 
prevents (5)
 Allotrope: Oxygen
 Compounds: Silver
 Compounds: Sodium
 Data1: Sulfur
 Reactions: Aluminium
 
previous (6)
 Biography: Arthur Jeffrey Dempster
 Data1: Technetium
 Glossary: Periods
 Glossary: Transactinides
 Production: Sodium
 Production: Uranium
 
previously (25)
 Allotrope: Carbon
 Biography: Emilio Gino Segre
 Biography: Ida Eva Tacke Noddack
 Biography: Joseph Louis Gay-Lussac
 Biography: Sir Humphry Davy
 Country: United States of America
 Data1: Bohrium
 Data1: Cobalt
 Data1: Darmstadtium
 Data1: Dubnium
 Data1: Fluorine
 Data1: Francium
 Data1: Hassium
 Data1: Meitnerium
 Data1: Molybdenum
 Data1: Niobium
 Data1: Radon
 Data1: Roentgenium
 Data1: Rutherfordium
 Data1: Seaborgium
 Data1: Tantalum
 Data1: Ununbium
 Document: The Noble Gases (Group 18)
 On This Day... 2 February
 Production: Fluorine
 
prf3 (1)
 Reactions: Praseodymium
 
pri3 (1)
 Reactions: Praseodymium
 
price (11)
 Data1: Gold
 Data1: Palladium
 Data1: Platinum
 Production: Beryllium
 Production: Bismuth
 Production: Caesium
 Production: Copper
 Production: Indium
 Production: Rhodium
 Production: Tellurium
 Production: Uranium
 
priced (1)
 Data1: Neodymium
 
prices (5)
 Country: Russia
 Data1: Neodymium
 Data1: Palladium
 Production: Palladium
 Production: Uranium
 
priestley (9)
 Biography: Antoine-Laurent de Lavoisier
 Biography: Joseph Priestley
 Biography: Karl Wilhelm Scheele
 Compounds: Nitrogen
 Data1: Oxygen
 On This Day... 13 March
 On This Day... 15 February
 On This Day... 19 April
 On This Day... 4 April
 
priestly (1)
 Biography: Joseph Priestley
 
primaries (1)
 On This Day... 24 July
 
primarily (25)
 Biography: Antoine Alexandre Brutus Bussy
 Compounds: Chlorine
 Compounds: Lanthanum
 Compounds: Silicon
 Compounds: Silver
 Compounds: Sodium
 Compounds: Zirconium
 Country: Oceans / Seas
 Data1: Antimony
 Data1: Caesium
 Data1: Carbon
 Data1: Chromium
 Data1: Hydrogen
 Data1: Neodymium
 Data1: Oxygen
 Data1: Palladium
 Data1: Rubidium
 Glossary: Inert
 Isotope: Argon
 Isotope: Oxygen
 Production: Barium
 Production: Helium
 Production: Lead
 Production: Technetium
 Production: Titanium
 
primary (62)
 Biography: Dmitriy Ivanovich Mendeleyev
 Compounds: Silicon
 Country: Australia
 Country: Brazil
 Country: Canada
 Country: China
 Country: Germany
 Country: Ghana
 Country: Hungary
 Country: India
 Country: Indonesia
 Country: Jamaica
 Country: Japan
 Country: Kazakhstan
 Country: Malaysia
 Country: Norway
 Country: Slovakia
 Country: South Africa
 Country: Ukraine
 Country: United Kingdom
 Country: United States of America
 Data1: Aluminium
 Data1: Cobalt
 Data1: Copper
 Data1: Dysprosium
 Data1: Erbium
 Data1: Europium
 Data1: Gadolinium
 Data1: Iodine
 Data1: Iron
 Data1: Lanthanum
 Data1: Lead
 Data1: Lutetium
 Data1: Molybdenum
 Data1: Neodymium
 Data1: Nickel
 Data1: Nitrogen
 Data1: Platinum
 Data1: Praseodymium
 Data1: Rhodium
 Data1: Samarium
 Data1: Scandium
 Data1: Silicon
 Data1: Sodium
 Data1: Strontium
 Data1: Sulfur
 Data1: Terbium
 Data1: Thorium
 Data1: Thulium
 Data1: Titanium
 Data1: Ununtrium
 Data1: Zirconium
 Glossary: Alloy
 Glossary: Periodic Table
 Glossary: Thermal Conductivity
 Isotope: Fluorine
 Production: Argon
 Production: Bismuth
 Production: Bromine
 Production: Caesium
 Production: Gallium
 Production: Technetium
 
primer (3)
 Compounds: Lead
 Compounds: Zinc
 Data1: Aluminium
 
primers (2)
 Compounds: Iodine
 Compounds: Nitrogen
 
primitive (3)
 Biography: Irene Joliot-Curie
 Equation: Ideal gas law
 Glossary: Magnetic Ordering
 
primordial (3)
 Data1: Xenon
 Isotope: Iodine
 Isotope: Lithium
 
princes (1)
 Biography: Julius Caesar Scaliger
 
princeton (1)
 Biography: Edwin Mattison McMillan
 
principal (33)
 Biography: Robert Wilhelm Bunsen
 Compounds: Manganese
 Compounds: Potassium
 Compounds: Sodium
 Compounds: Sulfur
 Country: Canada
 Country: China
 Country: Germany
 Country: Outer space
 Country: Poland
 Country: United States of America
 Data1: Lutetium
 Data1: Magnesium
 Data1: Molybdenum
 Data1: Nickel
 Data1: Rhodium
 Data1: Ununhexium
 Glossary: Energy Levels
 Production: Copper
 Production: Erbium
 Production: Helium
 Production: Holmium
 Production: Lanthanum
 Production: Lutetium
 Production: Molybdenum
 Production: Nickel
 Production: Potassium
 Production: Rhodium
 Production: Silicon
 Production: Silver
 Production: Tellurium
 Production: Thulium
 Production: Zirconium
 
principality (1)
 Biography: Julius Caesar Scaliger
 
principally (8)
 Biography: Andre Louis Debierne
 Data1: Iron
 Data1: Tin
 Production: Iron
 Production: Magnesium
 Production: Manganese
 Production: Tantalum
 Production: Thulium
 
principle (5)
 Compounds: Magnesium
 Glossary: Vickers Hardness
 On This Day... 15 October
 On This Day... 25 April
 On This Day... 5 December
 
principles (3)
 Biography: Irene Joliot-Curie
 Biography: John Dalton
 Biography: Julius Caesar Scaliger
 
printed (7)
 Biography: Julius Caesar Scaliger
 Compounds: Copper
 Compounds: Gadolinium
 Compounds: Indium
 Compounds: Iron
 Compounds: Selenium
 Compounds: Sodium
 
printers (1)
 Allotrope: Oxygen
 
printing (3)
 Compounds: Aluminium
 Compounds: Lead
 Data1: Bismuth
 
prior (8)
 Biography: Robert Wilhelm Bunsen
 Compounds: Sulfur
 Country: Canada
 Data1: Europium
 Data1: Helium
 Data1: Samarium
 Data1: Zinc
 Production: Uranium
 
priority (1)
 Biography: Karl Wilhelm Scheele
 
prism (2)
 Biography: Robert Wilhelm Bunsen
 Biography: William Hyde Wollaston
 
prisms (1)
 Data1: Germanium
 
prisoners (1)
 Compounds: Sodium
 
private (5)
 Biography: Antoine-Laurent de Lavoisier
 Biography: Irene Joliot-Curie
 Biography: John William Strutt Rayleigh
 Biography: Joseph Louis Gay-Lussac
 Data1: Plutonium
 
privateers (1)
 Data1: Platinum
 
privilege (1)
 Biography: Jöns Jacob Berzelius
 
prize (81)
 Allotrope: Carbon
 Biography: Edwin Mattison McMillan
 Biography: Enrico Fermi
 Biography: Ferdinand Frederic Henri Moissan
 Biography: Frederick Soddy
 Biography: George Charles de Hevesy
 Biography: Glenn Theodore Seaborg
 Biography: Gottfried Münzenberg
 Biography: Irene Joliot-Curie
 Biography: John William Strutt Rayleigh
 Biography: Joseph W. Kennedy
 Biography: Lise Meitner
 Biography: Marie Curie (Marya Sklodowska)
 Biography: Otto Hahn
 Biography: Pierre Curie
 Biography: Sir William Ramsay
 Data1: Fluorine
 Data1: Nobelium
 Glossary: Antiproton
 On This Day... 1 June
 On This Day... 1 November
 On This Day... 10 December
 On This Day... 10 July
 On This Day... 12 August
 On This Day... 12 September
 On This Day... 13 August
 On This Day... 14 April
 On This Day... 14 February
 On This Day... 14 March
 On This Day... 15 December
 On This Day... 15 May
 On This Day... 16 August
 On This Day... 16 June
 On This Day... 16 September
 On This Day... 18 June
 On This Day... 19 July
 On This Day... 19 June
 On This Day... 19 March
 On This Day... 19 November
 On This Day... 2 July
 On This Day... 20 April
 On This Day... 20 July
 On This Day... 20 October
 On This Day... 21 April
 On This Day... 21 July
 On This Day... 21 March
 On This Day... 22 March
 On This Day... 22 May
 On This Day... 23 August
 On This Day... 23 January
 On This Day... 23 March
 On This Day... 24 March
 On This Day... 25 April
 On This Day... 26 February
 On This Day... 27 March
 On This Day... 27 November
 On This Day... 29 April
 On This Day... 29 July
 On This Day... 29 November
 On This Day... 3 December
 On This Day... 3 October
 On This Day... 30 October
 On This Day... 31 January
 On This Day... 31 May
 On This Day... 31 October
 On This Day... 4 September
 On This Day... 5 December
 On This Day... 5 July
 On This Day... 5 November
 On This Day... 6 July
 On This Day... 6 May
 On This Day... 7 June
 On This Day... 7 November
 On This Day... 7 October
 On This Day... 8 August
 On This Day... 8 June
 On This Day... 9 December
 On This Day... 9 July
 On This Day... 9 May
 On This Day... 9 November
 Production: Fluorine
 
prizes (2)
 Biography: George Charles de Hevesy
 On This Day... 21 October
 
proa (1)
 Country: Mexico
 
probability (1)
 Glossary: Double Electron Capture
 
probably (34)
 Data1: Astatine
 Data1: Berkelium
 Data1: Bohrium
 Data1: Californium
 Data1: Darmstadtium
 Data1: Dubnium
 Data1: Einsteinium
 Data1: Fermium
 Data1: Gold
 Data1: Hassium
 Data1: Iron
 Data1: Lawrencium
 Data1: Manganese
 Data1: Meitnerium
 Data1: Mendelevium
 Data1: Nitrogen
 Data1: Nobelium
 Data1: Roentgenium
 Data1: Rutherfordium
 Data1: Seaborgium
 Data1: Silicon
 Data1: Sulfur
 Data1: Ununbium
 Data1: Ununhexium
 Data1: Ununoctium
 Data1: Ununpentium
 Data1: Ununquadium
 Data1: Ununseptium
 Data1: Ununtrium
 Data1: Zinc
 Glossary: Periods
 Glossary: Transactinides
 Production: Gold
 Production: Tin
 
probaly (1)
 Reactions: Fluorine
 
probe (3)
 Country: Outer space
 Data1: Argon
 Production: Neon
 
problem (5)
 Compounds: Silver
 Data1: Americium
 Data1: Argon
 Data1: Fluorine
 Production: Fluorine
 
problems (8)
 Biography: John William Strutt Rayleigh
 Country: Australia
 Data1: Manganese
 Data1: Tantalum
 Isotope: Cobalt
 Production: Aluminium
 Production: Uranium
 Reactions: Iron
 
procedure (4)
 Data1: Plutonium
 Data1: Rhodium
 Glossary: Gamma Ray
 Production: Polonium
 
procedures (4)
 Biography: Joseph Louis Gay-Lussac
 Compounds: Uranium
 Data1: Polonium
 Data1: Technetium
 
proceed (3)
 Country: China
 Glossary: Endothermic
 Reactions: Nickel
 
proceeded (1)
 Biography: (Gabriel) Daniel Fahrenheit
 
proceeds (1)
 Reactions: Rubidium
 
process (95)
 Biography: Antoine-Laurent de Lavoisier
 Biography: Bernard Courtois
 Biography: Ferdinand Frederic Henri Moissan
 Biography: Joseph Louis Gay-Lussac
 Biography: Otto Hahn
 Biography: Philip Hauge Abelson
 Biography: Sir Humphry Davy
 Biography: William Hyde Wollaston
 Compounds: Chlorine
 Compounds: Fluorine
 Compounds: Hafnium
 Compounds: Potassium
 Compounds: Praseodymium
 Compounds: Sulfur
 Compounds: Zinc
 Country: Outer space
 Country: Peru
 Country: Spain
 Country: United Kingdom
 Data1: Fluorine
 Data1: Hafnium
 Data1: Iridium
 Data1: Iron
 Data1: Krypton
 Data1: Lanthanum
 Data1: Magnesium
 Data1: Mercury
 Data1: Neodymium
 Data1: Phosphorus
 Data1: Protactinium
 Data1: Rhenium
 Data1: Samarium
 Data1: Scandium
 Data1: Sulfur
 Data1: Tantalum
 Data1: Technetium
 Data1: Thorium
 Data1: Titanium
 Data1: Tungsten
 Data1: Zinc
 Data1: Zirconium
 Document: The Halogens (Group 17)
 Glossary:
 Glossary: Abundance
 Glossary: Alpha Decay
 Glossary: Double Beta Decay
 Glossary: Double Electron Capture
 Glossary: Electron Capture
 Glossary: Endothermic
 Glossary: Enthalpy Change of Vapourisation
 Glossary: Halogens
 Glossary: Isometric Transition
 Glossary: Positron Emission (Beta+ Decay)
 Glossary: Spontaneous Fission
 Glossary: Temperature
 Isotope: Oxygen
 On This Day... 10 April
 On This Day... 12 January
 On This Day... 16 August
 On This Day... 17 November
 On This Day... 18 January
 On This Day... 2 March
 On This Day... 27 December
 On This Day... 3 May
 On This Day... 31 December
 On This Day... 9 December
 Production: Aluminium
 Production: Argon
 Production: Arsenic
 Production: Boron
 Production: Cerium
 Production: Chlorine
 Production: Fluorine
 Production: Francium
 Production: Gallium
 Production: Gold
 Production: Hafnium
 Production: Hydrogen
 Production: Iron
 Production: Lead
 Production: Magnesium
 Production: Plutonium
 Production: Potassium
 Production: Praseodymium
 Production: Ruthenium
 Production: Silver
 Production: Sodium
 Production: Technetium
 Production: Tellurium
 Production: Thorium
 Production: Uranium
 Production: Zinc
 Production: Zirconium
 Reactions: Iron
 Reactions: Phosphorus
 
processed (11)
 Compounds: Tantalum
 Compounds: Zirconium
 Country: Canada
 Data1: Osmium
 Data1: Scandium
 Production: Osmium
 Production: Palladium
 Production: Platinum
 Production: Rhodium
 Production: Selenium
 Production: Terbium
 
processes (26)
 Biography: George Charles de Hevesy
 Biography: John Dalton
 Biography: Philip Hauge Abelson
 Compounds: Antimony
 Compounds: Chlorine
 Compounds: Sodium
 Compounds: Sulfur
 Data1: Chlorine
 Data1: Iron
 Data1: Titanium
 Glossary: Carcinogen
 Glossary: Cosmogenic isotope
 Isotope: Iodine
 On This Day... 16 September
 On This Day... 24 March
 On This Day... 26 February
 On This Day... 28 April
 On This Day... 29 November
 Production: Aluminium
 Production: Hydrogen
 Production: Mercury
 Production: Nitrogen
 Production: Samarium
 Production: Sulfur
 Production: Technetium
 Production: Zinc
 
processing (23)
 Compounds: Chlorine
 Compounds: Copper
 Compounds: Oxygen
 Compounds: Potassium
 Compounds: Silicon
 Compounds: Sulfur
 Country: United Kingdom
 Data1: Promethium
 Data1: Protactinium
 Data1: Rhenium
 Data1: Thulium
 Data1: Titanium
 Production: Bismuth
 Production: Germanium
 Production: Indium
 Production: Iridium
 Production: Palladium
 Production: Platinum
 Production: Radium
 Production: Selenium
 Production: Technetium
 Production: Zinc
 Production: Zirconium
 
processors (3)
 Data1: Europium
 Data1: Samarium
 Glossary: Metalloids
 
procter (1)
 Compounds: Sodium
 
procured (1)
 Biography: Louis Jacques Thenard
 
prodigies (1)
 Biography: Julius Caesar Scaliger
 
prodigious (1)
 Biography: Julius Caesar Scaliger
 
produce (59)
 Allotrope: Carbon
 Biography: Pierre Curie
 Biography: Robert Wilhelm Bunsen
 Biography: William Hyde Wollaston
 Compounds: Chlorine
 Country: Outer space
 Country: Ukraine
 Country: United Kingdom
 Data1: Aluminium
 Data1: Berkelium
 Data1: Bohrium
 Data1: Bromine
 Data1: Californium
 Data1: Chromium
 Data1: Cobalt
 Data1: Einsteinium
 Data1: Fluorine
 Data1: Helium
 Data1: Iron
 Data1: Lanthanum
 Data1: Neodymium
 Data1: Platinum
 Data1: Plutonium
 Data1: Praseodymium
 Data1: Protactinium
 Data1: Silver
 Data1: Tantalum
 Data1: Technetium
 Data1: Thorium
 Document: The Alkali (Group 1) Metals
 Document: The Halogens (Group 17)
 Glossary: Acid
 Glossary: Base
 Glossary: Exothermic
 Isotope: Actinium
 Isotope: Plutonium
 Isotope: Uranium
 On This Day... 14 December
 On This Day... 23 February
 Production: Aluminium
 Production: Argon
 Production: Berkelium
 Production: Chromium
 Production: Einsteinium
 Production: Fluorine
 Production: Hydrogen
 Production: Iron
 Production: Lead
 Production: Oxygen
 Production: Technetium
 Production: Uranium
 Reactions: Bromine
 Reactions: Cadmium
 Reactions: Chlorine
 Reactions: Cobalt
 Reactions: Fluorine
 Reactions: Iodine
 Reactions: Oxygen
 Reactions: Scandium
 
produced (256)
 Allotrope: Arsenic
 Allotrope: Carbon
 Biography: Albert Ghiorso
 Biography: Dmitriy Ivanovich Mendeleyev
 Biography: Emilio Gino Segre
 Biography: Hans Christian Oersted
 Biography: Ida Eva Tacke Noddack
 Biography: Johann Schroder
 Biography: Joseph Louis Gay-Lussac
 Biography: Peter Armbruster
 Biography: Philip Hauge Abelson
 Biography: Pierre Curie
 Compounds: Carbon
 Compounds: Chlorine
 Compounds: Helium
 Compounds: Iodine
 Compounds: Lithium
 Compounds: Magnesium
 Compounds: Mercury
 Compounds: Nitrogen
 Compounds: Oxygen
 Compounds: Potassium
 Compounds: Radon
 Compounds: Sulfur
 Country: Afghanistan
 Country: Albania
 Country: Algeria
 Country: Argentina
 Country: Australia
 Country: Austria
 Country: Belgium
 Country: Bolivia
 Country: Brazil
 Country: Bulgaria
 Country: Burma (Myanmar)
 Country: Canada
 Country: Chile
 Country: China
 Country: Colombia
 Country: Cuba
 Country: Cyprus
 Country: Democratic People's Republic of Korea
 Country: Democratic Republic of Congo
 Country: Ecuador
 Country: Egypt
 Country: Finland
 Country: France
 Country: Gambia
 Country: Germany
 Country: Ghana
 Country: Greece
 Country: Honduras
 Country: Iceland
 Country: India
 Country: Indonesia
 Country: Iran
 Country: Ireland
 Country: Italy
 Country: Japan
 Country: Jordan
 Country: Kazakhstan
 Country: Kenya
 Country: Kuwait
 Country: Kyrgyzstan
 Country: Laos
 Country: Macedonia
 Country: Madagascar
 Country: Malaysia
 Country: Mexico
 Country: Mongolia
 Country: Morocco
 Country: Mozambique
 Country: Namibia
 Country: Netherlands
 Country: Nigeria
 Country: Norway
 Country: Oman
 Country: Outer space
 Country: Pakistan
 Country: Peru
 Country: Philippines
 Country: Poland
 Country: Portugal
 Country: Republic of Korea
 Country: Romania
 Country: Russia
 Country: Rwanda
 Country: Saudi Arabia
 Country: Serbia
 Country: Sierra Leone
 Country: Slovakia
 Country: South Africa
 Country: Spain
 Country: Sri Lanka
 Country: Sudan
 Country: Sweden
 Country: Tajikistan
 Country: Thailand
 Country: Tunisia
 Country: Turkey
 Country: Turkmenistan
 Country: Uganda
 Country: Ukraine
 Country: United Arab Emirates
 Country: United Kingdom
 Country: United States of America
 Country: Uzbekistan
 Country: Venezuela
 Country: Vietnam
 Country: Zambia
 Country: Zimbabwe
 Data1: Aluminium
 Data1: Americium
 Data1: Astatine
 Data1: Bohrium
 Data1: Boron
 Data1: Bromine
 Data1: Caesium
 Data1: Californium
 Data1: Chlorine
 Data1: Cobalt
 Data1: Dubnium
 Data1: Dysprosium
 Data1: Einsteinium
 Data1: Erbium
 Data1: Fermium
 Data1: Gallium
 Data1: Germanium
 Data1: Gold
 Data1: Hydrogen
 Data1: Indium
 Data1: Iodine
 Data1: Iridium
 Data1: Iron
 Data1: Lanthanum
 Data1: Lawrencium
 Data1: Lithium
 Data1: Manganese
 Data1: Meitnerium
 Data1: Mendelevium
 Data1: Mercury
 Data1: Neodymium
 Data1: Neptunium
 Data1: Nickel
 Data1: Niobium
 Data1: Nitrogen
 Data1: Nobelium
 Data1: Oxygen
 Data1: Phosphorus
 Data1: Platinum
 Data1: Plutonium
 Data1: Potassium
 Data1: Promethium
 Data1: Rhenium
 Data1: Samarium
 Data1: Scandium
 Data1: Selenium
 Data1: Silicon
 Data1: Silver
 Data1: Sodium
 Data1: Strontium
 Data1: Sulfur
 Data1: Tantalum
 Data1: Technetium
 Data1: Tellurium
 Data1: Terbium
 Data1: Thorium
 Data1: Titanium
 Data1: Ununhexium
 Data1: Ununoctium
 Data1: Ununpentium
 Data1: Ununquadium
 Data1: Ununseptium
 Data1: Ytterbium
 Document: The Alkali (Group 1) Metals
 Glossary: Alpha Decay
 Glossary: Anti-Neutrino
 Glossary: Cosmogenic isotope
 Glossary: Endothermic
 Glossary: Exothermic
 Glossary: Island of Stability
 Glossary: Neutrino
 Isotope: Beryllium
 Isotope: Caesium
 Isotope: Calcium
 Isotope: Chlorine
 Isotope: Cobalt
 Isotope: Helium
 Isotope: Hydrogen
 Isotope: Iodine
 Isotope: Krypton
 Isotope: Lithium
 Isotope: Nickel
 Isotope: Oxygen
 Isotope: Ununseptium
 On This Day... 14 August
 On This Day... 14 February
 On This Day... 15 April
 On This Day... 19 February
 On This Day... 2 December
 On This Day... 2 May
 On This Day... 21 January
 On This Day... 29 February
 Production: Aluminium
 Production: Americium
 Production: Astatine
 Production: Barium
 Production: Bismuth
 Production: Boron
 Production: Bromine
 Production: Cadmium
 Production: Californium
 Production: Chlorine
 Production: Chromium
 Production: Cobalt
 Production: Einsteinium
 Production: Gold
 Production: Hafnium
 Production: Helium
 Production: Hydrogen
 Production: Indium
 Production: Iodine
 Production: Iron
 Production: Lawrencium
 Production: Lead
 Production: Lithium
 Production: Mendelevium
 Production: Mercury
 Production: Neon
 Production: Neptunium
 Production: Nickel
 Production: Nobelium
 Production: Oxygen
 Production: Palladium
 Production: Platinum
 Production: Plutonium
 Production: Polonium
 Production: Radon
 Production: Rubidium
 Production: Selenium
 Production: Silver
 Production: Sodium
 Production: Sulfur
 Production: Technetium
 Production: Tellurium
 Production: Tungsten
 Production: Uranium
 Production: Vanadium
 Production: Yttrium
 Production: Zinc
 Production: Zirconium
 Reactions: Bismuth
 Reactions: Hydrogen
 Reactions: Lithium
 Reactions: Osmium
 Reactions: Rhodium
 
producer (51)
 Country: Algeria
 Country: Argentina
 Country: Australia
 Country: Belgium
 Country: Bolivia
 Country: Canada
 Country: Chile
 Country: China
 Country: France
 Country: India
 Country: Indonesia
 Country: Israel
 Country: Japan
 Country: Kazakhstan
 Country: Kyrgyzstan
 Country: Mexico
 Country: Namibia
 Country: Niger
 Country: Peru
 Country: Russia
 Country: South Africa
 Country: Sweden
 Country: Tajikistan
 Country: United Kingdom
 Country: United States of America
 Country: Uzbekistan
 Country: Zimbabwe
 Data1: Cadmium
 Data1: Indium
 Data1: Iridium
 Data1: Neodymium
 Data1: Nickel
 Data1: Silver
 Production: Aluminium
 Production: Antimony
 Production: Arsenic
 Production: Bismuth
 Production: Cadmium
 Production: Cobalt
 Production: Copper
 Production: Indium
 Production: Iodine
 Production: Iron
 Production: Lithium
 Production: Magnesium
 Production: Mercury
 Production: Niobium
 Production: Palladium
 Production: Platinum
 Production: Silver
 Production: Strontium
 
producers (50)
 Country: Australia
 Country: Canada
 Country: Chile
 Country: China
 Country: Germany
 Country: Hungary
 Country: Japan
 Country: Kazakhstan
 Country: Poland
 Country: Slovakia
 Country: Turkey
 Country: Ukraine
 Country: United Kingdom
 Country: United States of America
 Data1: Bismuth
 Data1: Boron
 Data1: Bromine
 Data1: Cerium
 Data1: Gold
 Data1: Iodine
 Data1: Lanthanum
 Data1: Lead
 Data1: Magnesium
 Data1: Molybdenum
 Data1: Neodymium
 Data1: Nickel
 Data1: Niobium
 Data1: Platinum
 Data1: Praseodymium
 Data1: Samarium
 Data1: Selenium
 Data1: Silicon
 Data1: Sodium
 Data1: Strontium
 Data1: Sulfur
 Data1: Terbium
 Data1: Thorium
 Data1: Thulium
 Data1: Ytterbium
 Data1: Zinc
 Data1: Zirconium
 Production: Boron
 Production: Bromine
 Production: Chromium
 Production: Gold
 Production: Molybdenum
 Production: Niobium
 Production: Rhenium
 Production: Uranium
 Production: Zinc
 
produces (35)
 Biography: Robert Wilhelm Bunsen
 Biography: William Hyde Wollaston
 Compounds: Aluminium
 Compounds: Carbon
 Compounds: Chlorine
 Compounds: Potassium
 Country: Brazil
 Country: Canada
 Country: Chile
 Data1: Hydrogen
 Data1: Lanthanum
 Data1: Magnesium
 Data1: Manganese
 Data1: Scandium
 Data1: Tellurium
 Data1: Titanium
 Data1: Tungsten
 Data1: Xenon
 Document: The Alkali (Group 1) Metals
 Glossary: Abundance
 Glossary: Exothermic
 Glossary: Temperature
 Isotope: Strontium
 Production: Argon
 Production: Chromium
 Production: Hydrogen
 Production: Magnesium
 Production: Nickel
 Production: Zinc
 Reactions: Antimony
 Reactions: Bismuth
 Reactions: Cobalt
 Reactions: Fluorine
 Reactions: Ruthenium
 Reactions: Uranium
 
producing (39)
 Biography: Ferdinand Frederic Henri Moissan
 Biography: Hans Christian Oersted
 Biography: Sir William Crookes
 Compounds: Boron
 Compounds: Cobalt
 Compounds: Copper
 Compounds: Lithium
 Compounds: Sodium
 Country: Algeria
 Country: Australia
 Country: China
 Country: Mexico
 Country: Outer space
 Country: Peru
 Country: Russia
 Country: United States of America
 Data1: Copper
 Data1: Dubnium
 Data1: Fermium
 Data1: Gold
 Data1: Iron
 Data1: Lutetium
 Data1: Scandium
 Data1: Seaborgium
 Data1: Technetium
 Data1: Thorium
 Glossary: Allotrope
 Isotope: Cobalt
 On This Day... 13 July
 On This Day... 16 February
 On This Day... 31 January
 Production: Aluminium
 Production: Gallium
 Production: Gold
 Production: Hydrogen
 Production: Lead
 Production: Plutonium
 Production: Uranium
 Production: Zinc
 
product (49)
 Biography: Bernard Courtois
 Biography: Peter Armbruster
 Biography: Robert Wilhelm Bunsen
 Compounds: Carbon
 Compounds: Chlorine
 Compounds: Mercury
 Country: Australia
 Country: Outer space
 Data1: Cadmium
 Data1: Chlorine
 Data1: Francium
 Data1: Iodine
 Data1: Neptunium
 Data1: Radium
 Data1: Radon
 Data1: Rhodium
 Data1: Samarium
 Data1: Silicon
 Data1: Technetium
 Data1: Tellurium
 Data1: Ununtrium
 Glossary: Acid
 Glossary: Alpha Decay
 Glossary: Centigrade (celsius)
 Glossary: Fahrenheit
 Isotope: Iodine
 Isotope: Radium
 On This Day... 2 October
 Production: Bismuth
 Production: Boron
 Production: Cobalt
 Production: Hafnium
 Production: Helium
 Production: Hydrogen
 Production: Iridium
 Production: Neptunium
 Production: Platinum
 Production: Promethium
 Production: Radium
 Production: Technetium
 Production: Thallium
 Production: Vanadium
 Reactions: Bromine
 Reactions: Fluorine
 Reactions: Hydrogen
 Reactions: Lithium
 Reactions: Rhenium
 Reactions: Ruthenium
 Reactions: Thallium
 
products (52)
 Allotrope: Carbon
 Biography: Antoine-Laurent de Lavoisier
 Biography: Gottfried Münzenberg
 Biography: Otto Hahn
 Biography: Robert Wilhelm Bunsen
 Compounds: Aluminium
 Compounds: Arsenic
 Compounds: Boron
 Compounds: Calcium
 Compounds: Chlorine
 Compounds: Cobalt
 Compounds: Phosphorus
 Compounds: Potassium
 Compounds: Selenium
 Compounds: Sodium
 Compounds: Titanium
 Data1: Aluminium
 Data1: Calcium
 Data1: Californium
 Data1: Chlorine
 Data1: Fluorine
 Data1: Iron
 Data1: Krypton
 Data1: Lead
 Data1: Neodymium
 Data1: Phosphorus
 Data1: Promethium
 Data1: Protactinium
 Data1: Radium
 Data1: Radon
 Data1: Tellurium
 Data1: Ununhexium
 Document: The Halogens (Group 17)
 Document: The Lanthanoid Series
 Glossary: Acid
 Glossary: Decay Energy
 Glossary: Desiccant
 Glossary: Enzyme
 Glossary: Halogens
 Isotope: Beryllium
 Isotope: Californium
 On This Day... 27 May
 Production: Argon
 Production: Germanium
 Production: Neptunium
 Production: Nitrogen
 Production: Rhodium
 Production: Ruthenium
 Production: Technetium
 Reactions: Astatine
 Reactions: Calcium
 Reactions: Phosphorus
 
professional (1)
 Biography: Robert Wilhelm Bunsen
 
professor (38)
 Biography: Antoine-Jerome Balard
 Biography: Carl Gustav Mosander
 Biography: Dale R. Corson
 Biography: Daniel Rutherford
 Biography: Dirk Coster
 Biography: Dmitriy Ivanovich Mendeleyev
 Biography: Edwin Mattison McMillan
 Biography: Emilio Gino Segre
 Biography: Enrico Fermi
 Biography: Ferdinand Frederic Henri Moissan
 Biography: Frederick Soddy
 Biography: Friedrich Stromeyer
 Biography: Friedrich Wöhler
 Biography: Glenn Theodore Seaborg
 Biography: Gottfried Münzenberg
 Biography: Gustav Robert Kirchhoff
 Biography: Jacob A. Marinsky
 Biography: Jean Charles Galissard de Marignac
 Biography: Johan Gadolin
 Biography: John William Strutt Rayleigh
 Biography: Jöns Jacob Berzelius
 Biography: Joseph Louis Gay-Lussac
 Biography: Joseph W. Kennedy
 Biography: Karl Klaus
 Biography: Karl Wilhelm Scheele
 Biography: Louis Jacques Thenard
 Biography: Louis Nicolas Vauquelin
 Biography: Martin Heinrich Klaproth
 Biography: Per Teodor Cleve
 Biography: Pierre Curie
 Biography: Robert Wilhelm Bunsen
 Biography: Sir William Ramsay
 Biography: Smithson Tennant
 Data1: Darmstadtium
 Data1: Thorium
 Data1: Uranium
 On This Day... 11 April
 On This Day... 27 February
 
professors (1)
 Data1: Oxygen
 
professorship (2)
 Biography: Hans Christian Oersted
 Biography: Louis Jacques Thenard
 
proficient (1)
 Biography: Jöns Jacob Berzelius
 
profile (2)
 Compounds: Calcium
 Production: Aluminium
 
profiles (1)
 Biography: Sir Humphry Davy
 
profitable (1)
 Production: Palladium
 
profusion (1)
 Data1: Gold
 
program (10)
 Country: Outer space
 Country: United States of America
 Data1: Einsteinium
 Data1: Niobium
 Data1: Yttrium
 Data1: Zirconium
 On This Day... 11 November
 Production: Einsteinium
 Production: Yttrium
 Production: Zirconium
 
progress (2)
 Biography: Louis Jacques Thenard
 Glossary: pH
 
progresses (1)
 Data1: Praseodymium
 
progressively (2)
 Data1: Thulium
 Production: Arsenic
 
prohibited (1)
 Data1: Radium
 
prohibiting (1)
 Data1: Sulfur
 
prohibitively (1)
 Production: Thallium
 
project (13)
 Biography: Albert Ghiorso
 Biography: Arthur C. Wahl
 Biography: Emilio Gino Segre
 Biography: Glenn Theodore Seaborg
 Biography: Gottfried Münzenberg
 Biography: Peter Armbruster
 Biography: Pierre Jules César Janssen
 Data1: Aluminium
 Data1: Fluorine
 Data1: Plutonium
 On This Day... 28 March
 Production: Fluorine
 Production: Gold
 
projection (1)
 Data1: Xenon
 
projector (1)
 Data1: Praseodymium
 
projectors (2)
 Data1: Germanium
 Document: The Lanthanoid Series
 
projects (5)
 Biography: Philip Hauge Abelson
 Compounds: Barium
 Country: China
 Data1: Argon
 Data1: Plutonium
 
prolong (1)
 Data1: Mercury
 
prolonged (2)
 Data1: Gallium
 Reactions: Zinc
 
promecio (1)
 Names: Promethium
 
prometheus (1)
 Data1: Promethium
 
promethium (17)
 Atomic data: Promethium
 Biography: Jacob A. Marinsky
 Compounds: Promethium
 Country: Outer space
 Data1: Promethium
 Data2: Promethium
 Document: The Lanthanoid Series
 Glossary: Abundance
 Glossary: Rare Earth Elements
 Isotope: Promethium
 Isotope: Technetium
 MAC data: Promethium
 Names: Promethium
 On This Day... 18 November
 Production: Promethium
 Reactions: Promethium
 Spectrum: Promethium
 
prometij (1)
 Names: Promethium
 
prometio (1)
 Names: Promethium
 
prometium (1)
 Names: Promethium
 
prominence (2)
 Biography: Antoine-Laurent de Lavoisier
 Country: Outer space
 
prominences (1)
 Biography: Pierre Jules César Janssen
 
prominent (5)
 Biography: Antoine-Laurent de Lavoisier
 Biography: Dmitriy Ivanovich Mendeleyev
 Biography: Irene Joliot-Curie
 Compounds: Nitrogen
 Country: Outer space
 
promote (3)
 Data1: Fluorine
 Data1: Oxygen
 Production: Fluorine
 
promoted (1)
 Biography: Dale R. Corson
 
promotes (1)
 Glossary: Carcinogen
 
promoting (1)
 Compounds: Sodium
 
prompted (1)
 Biography: Pierre Jules César Janssen
 
prone (3)
 Compounds: Samarium
 Data1: Argon
 Production: Radon
 
pronounced (1)
 Glossary: Metalloids
 
prontosil (1)
 On This Day... 30 October
 
proof (3)
 Biography: Ida Eva Tacke Noddack
 Compounds: Titanium
 Data1: Antimony
 
proofing (2)
 Data1: Antimony
 Data1: Bromine
 
proofs (1)
 Biography: Ida Eva Tacke Noddack
 
propagation (3)
 Biography: John William Strutt Rayleigh
 Compounds: Chlorine
 Compounds: Sodium
 
propellant (2)
 Compounds: Potassium
 Data1: Caesium
 
propellants (3)
 Compounds: Nitrogen
 Compounds: Strontium
 Data1: Lithium
 
propeller (1)
 Data1: Titanium
 
proper (5)
 Compounds: Iodine
 Glossary: Electron
 Glossary: Neutron
 Glossary: Positron
 Glossary: Proton
 
properly (4)
 Data1: Chromium
 Data1: Radium
 Glossary: Heat Capacity
 Isotope: Lithium
 
property (13)
 Allotrope: Carbon
 Biography: Joseph Louis Gay-Lussac
 Compounds: Fluorine
 Compounds: Vanadium
 Data1: Germanium
 Data1: Helium
 Data1: Hydrogen
 Data1: Indium
 Data1: Lanthanum
 Data1: Niobium
 Glossary: Enthalpy Change of Vapourisation
 Glossary: Temperature
 Glossary: Thermal Conductivity
 
propionate (1)
 Compounds: Sodium
 
proportion (10)
 Country: Outer space
 Data1: Francium
 Data1: Xenon
 Glossary: Plasma
 On This Day... 17 December
 Production: Gold
 Production: Mercury
 Production: Palladium
 Production: Terbium
 Production: Titanium
 
proportional (5)
 Biography: Michael Faraday
 Equation: Graham's Law
 Glossary: Temperature
 On This Day... 10 May
 On This Day... 12 December
 
proportionality (1)
 Equation: Avogadro's law
 
proportionally (2)
 Equation: Boyle's Law
 Glossary: Gas
 
proportions (8)
 Biography: Jöns Jacob Berzelius
 Biography: Sir Humphry Davy
 Data1: Samarium
 Glossary: Abundance
 Glossary: Compound
 On This Day... 10 March
 On This Day... 24 July
 On This Day... 26 September
 
proposals (1)
 Data1: Lutetium
 
proposed (18)
 Biography: Antoine-Jerome Balard
 Biography: Baron Axel Fredrik Cronstedt
 Biography: Dmitriy Ivanovich Mendeleyev
 Biography: Ida Eva Tacke Noddack
 Biography: Jöns Jacob Berzelius
 Biography: William Hyde Wollaston
 Compounds: Lutetium
 Data1: Bohrium
 Data1: Dubnium
 Data1: Francium
 Data1: Hassium
 Data1: Lutetium
 Data1: Plutonium
 Data1: Rutherfordium
 Glossary: Brinell Hardness
 Glossary: Island of Stability
 On This Day... 7 October
 Production: Radon
 
proposing (1)
 Biography: Joseph Louis Gay-Lussac
 
proprietary (9)
 Country: China
 Country: Germany
 Country: Hungary
 Country: Japan
 Country: Kazakhstan
 Country: Slovakia
 Country: Ukraine
 Country: United Kingdom
 Country: United States of America
 
proprieties (1)
 Glossary: Group
 
propulsion (2)
 Data1: Oxygen
 Data1: Xenon
 
propyl (1)
 Data1: Carbon
 
prosedimio (1)
 Names: Praseodymium
 
prospects (2)
 Biography: Joseph Louis Gay-Lussac
 Production: Uranium
 
prosphorous (1)
 Glossary: Allotrope
 
prostate (2)
 Compounds: Samarium
 Isotope: Strontium
 
prosthetic (1)
 Allotrope: Carbon
 
protacnidio (1)
 Names: Protactinium
 
protactinio (1)
 Names: Protactinium
 
protactinium (17)
 Atomic data: Protactinium
 Biography: Lise Meitner
 Biography: Otto Hahn
 Compounds: Protactinium
 Country: Democratic Republic of Congo
 Country: United Kingdom
 Data1: Meitnerium
 Data1: Protactinium
 Data2: Protactinium
 Document: The Actinoid Series
 Isotope: Protactinium
 MAC data: Protactinium
 Names: Protactinium
 On This Day... 4 January
 Production: Protactinium
 Reactions: Protactinium
 Spectrum: Protactinium
 
protactiniums (1)
 Reactions: Protactinium
 
protaktinij (1)
 Names: Protactinium
 
protaktinium (1)
 Names: Protactinium
 
protect (13)
 Biography: Sir William Crookes
 Compounds: Iodine
 Compounds: Sodium
 Compounds: Titanium
 Data1: Argon
 Data1: Zinc
 Reactions: Barium
 Reactions: Beryllium
 Reactions: Calcium
 Reactions: Iron
 Reactions: Magnesium
 Reactions: Radium
 Reactions: Strontium
 
protected (8)
 Biography: Sir Humphry Davy
 Data1: Molybdenum
 Production: Aluminium
 Reactions: Germanium
 Reactions: Lead
 Reactions: Niobium
 Reactions: Tantalum
 Reactions: Vanadium
 
protecting (3)
 Compounds: Chromium
 Data1: Helium
 Data1: Manganese
 
protection (6)
 Compounds: Silicon
 Data1: Molybdenum
 Data1: Sodium
 Glossary: Beta Particle
 Isotope: Cobalt
 Production: Radon
 
protective (4)
 Data1: Helium
 Data1: Molybdenum
 Glossary: Halogens
 Glossary: Refractory
 
protectors (1)
 Data1: Tellurium
 
protects (2)
 Glossary: Air
 Reactions: Thallium
 
protein (4)
 Compounds: Chlorine
 Compounds: Iodine
 Data1: Copper
 Glossary: Enzyme
 
proteins (7)
 Data1: Nitrogen
 Data1: Zinc
 Glossary: Molecule
 On This Day... 16 September
 On This Day... 18 May
 On This Day... 9 January
 Production: Nitrogen
 
protestant (1)
 Biography: Gottfried Münzenberg
 
protested (1)
 Data1: Dubnium
 
protium (1)
 Isotope: Hydrogen
 
proto (2)
 Country: Outer space
 Production: Neon
 
protoactinium (1)
 Data1: Protactinium
 
protoattinio (1)
 Names: Protactinium
 
proton (23)
 Country: Outer space
 Data1: Curium
 Glossary: Antiproton
 Glossary: Atomic Charge
 Glossary: Baryon
 Glossary: Base
 Glossary: Double Beta Decay
 Glossary: Doubly Magic
 Glossary: Electron
 Glossary: Electron Capture
 Glossary: Electron Emission (Beta- Decay)
 Glossary: Island of Stability
 Glossary: Neutron
 Glossary: Nucleon
 Glossary: Nucleus
 Glossary: Oxidation State
 Glossary: pH
 Glossary: Positron Emission (Beta+ Decay)
 Glossary: Proton
 Isotope: Hydrogen
 On This Day... 18 October
 Production: Helium
 Production: Polonium
 
protonation (1)
 Glossary: Base
 
protons (23)
 Data1: Copper
 Data1: Fermium
 Glossary:
 Glossary: Alpha Decay
 Glossary: Atom
 Glossary: Atomic Charge
 Glossary: Atomic Number (Z)
 Glossary: Double Beta Decay
 Glossary: Double Electron Capture
 Glossary: Doubly Magic
 Glossary: Electron Capture
 Glossary: Element
 Glossary: Island of Stability
 Glossary: Isotope
 Glossary: Magic Number
 Glossary: Mass Number (A)
 Glossary: Neutron
 Glossary: Proton
 Isotope: Chlorine
 Isotope: Helium
 Production: Francium
 Production: Helium
 Production: Hydrogen
 
protoplanetary (3)
 Compounds: Carbon
 Country: Outer space
 Production: Carbon
 
protos (1)
 Data1: Protactinium
 
prototype (1)
 Data1: Iridium
 
protozoa (1)
 Compounds: Chlorine
 
proust (1)
 On This Day... 26 September
 
prout (1)
 Biography: Jean Charles Galissard de Marignac
 
prove (4)
 Allotrope: Arsenic
 Biography: Emilio Gino Segre
 Biography: Georg Brandt
 Data1: Technetium
 
proved (11)
 Biography: Antoine-Jerome Balard
 Biography: Antoine-Laurent de Lavoisier
 Biography: Julius Caesar Scaliger
 Biography: Per Teodor Cleve
 Biography: Robert Wilhelm Bunsen
 Biography: Smithson Tennant
 Data1: Molybdenum
 Data1: Promethium
 Data1: Titanium
 On This Day... 19 March
 Production: Uranium
 
proven (1)
 Data1: Germanium
 
proves (1)
 Data1: Osmium
 
provide (11)
 Biography: Ida Eva Tacke Noddack
 Compounds: Oxygen
 Compounds: Potassium
 Compounds: Titanium
 Country: Outer space
 Country: United States of America
 Data1: Argon
 Data1: Europium
 Data1: Lanthanum
 Glossary: Spontaneous Fission
 Production: Radium
 
provided (9)
 Biography: Antoine-Laurent de Lavoisier
 Biography: Ida Eva Tacke Noddack
 Biography: John Dalton
 Biography: Philip Hauge Abelson
 Biography: Sir Humphry Davy
 Data1: Germanium
 Data1: Manganese
 Data1: Technetium
 Production: Chromium
 
provides (2)
 Glossary: Valence Electron Potential
 Production: Plutonium
 
province (1)
 Country: China
 
provinces (5)
 Country: South Africa
 Country: Turkey
 Data1: Rhenium
 Production: Boron
 Production: Gold
 
proving (1)
 On This Day... 11 September
 
provisional (1)
 Data1: Francium
 
provisions (1)
 Data1: Lead
 
provoked (2)
 Reactions: Hafnium
 Reactions: Zirconium
 
prunes (1)
 Compounds: Sodium
 
prussia (1)
 Data1: Technetium
 
prussian (4)
 Biography: Robert Wilhelm Bunsen
 Data1: Cobalt
 Data1: Polonium
 Data1: Thallium
 
prussic (2)
 Biography: Karl Wilhelm Scheele
 Biography: Sir William Ramsay
 
przybylski (2)
 Country: Outer space
 Production: Promethium
 
pseudo (1)
 Data1: Zinc
 
pseudoephedrine (1)
 Data1: Plutonium
 
pseudohelium (1)
 Data1: Mercury
 
psi (1)
 Data1: Rhenium
 
psilomelane (1)
 Data1: Manganese
 
psychiatric (1)
 Compounds: Lithium
 
psychiatrist (1)
 Compounds: Sodium
 
psychic (1)
 Biography: Sir William Crookes
 
pt (10)
 Atomic data: Platinum
 Country: South Africa
 Data1: Platinum
 Isotope: Gold
 Isotope: Iridium
 Isotope: Platinum
 Production: Platinum
 Production: Rhenium
 Reactions: Platinum
 Spectrum: Platinum
 
pt+ (1)
 Atomic data: Platinum
 
pt+2 (1)
 Data2: Platinum
 
pt+4 (1)
 Data2: Platinum
 
pt+5 (1)
 Data2: Platinum
 
pt+6 (1)
 Data2: Platinum
 
pt0 (1)
 Data2: Platinum
 
pt2+ (1)
 Reactions: Platinum
 
ptas2 (2)
 Country: Canada
 Production: Platinum
 
ptbr4 (1)
 Reactions: Platinum
 
ptcl2 (1)
 Reactions: Platinum
 
ptcl4 (1)
 Reactions: Platinum
 
ptcl42 (1)
 Reactions: Platinum
 
ptcl62 (1)
 Reactions: Platinum
 
ptf4 (1)
 Reactions: Platinum
 
ptf5 (1)
 Reactions: Platinum
 
ptf6 (1)
 Reactions: Platinum
 
pti4 (1)
 Reactions: Platinum
 
pto2 (1)
 Reactions: Platinum
 
ptotal (1)
 Equation: Total gas pressure as sum of partial pressures
 
ptsi (1)
 Compounds: Silicon
 
pu (16)
 Biography: Glenn Theodore Seaborg
 Data1: Americium
 Data1: Einsteinium
 Data1: Fermium
 Data1: Neptunium
 Data1: Plutonium
 Data1: Rutherfordium
 Glossary: Electron Volt
 Isotope: Curium
 Isotope: Neptunium
 Isotope: Plutonium
 Isotope: Strontium
 Production: Einsteinium
 Production: Plutonium
 Reactions: Plutonium
 Spectrum: Plutonium
 
pu+2 (1)
 Data2: Plutonium
 
pu+3 (1)
 Data2: Plutonium
 
pu+4 (1)
 Data2: Plutonium
 
pu+5 (1)
 Data2: Plutonium
 
pu+6 (1)
 Data2: Plutonium
 
pu+7 (1)
 Data2: Plutonium
 
pu3+ (1)
 Reactions: Plutonium
 
pu4+ (1)
 Reactions: Plutonium
 
public (5)
 Biography: Hans Christian Oersted
 Biography: Hennig Brand
 Data1: Iodine
 Glossary: X-Rays
 Production: Aluminium
 
publication (6)
 Biography: Antoine-Laurent de Lavoisier
 Biography: Enrico Fermi
 Biography: Julius Caesar Scaliger
 Biography: Karl Wilhelm Scheele
 Data1: Oxygen
 Production: Radon
 
publicize (1)
 Data1: Polonium
 
publicized (1)
 Data1: Radon
 
publique (1)
 Biography: Louis Jacques Thenard
 
publish (2)
 Biography: Jöns Jacob Berzelius
 Biography: Joseph Louis Gay-Lussac
 
published (31)
 Biography: Antoine Alexandre Brutus Bussy
 Biography: Antoine-Laurent de Lavoisier
 Biography: Dmitriy Ivanovich Mendeleyev
 Biography: Hans Christian Oersted
 Biography: Henry Cavendish
 Biography: Ida Eva Tacke Noddack
 Biography: Johan Gadolin
 Biography: Johann Schroder
 Biography: John Dalton
 Biography: Jöns Jacob Berzelius
 Biography: Joseph Louis Gay-Lussac
 Biography: Joseph Priestley
 Biography: Julius Caesar Scaliger
 Biography: Karl Wilhelm Scheele
 Biography: Lise Meitner
 Biography: Louis Jacques Thenard
 Biography: Pierre Jules César Janssen
 Biography: Robert Wilhelm Bunsen
 Biography: Sir Humphry Davy
 Data1: Arsenic
 Data1: Oxygen
 Data1: Sodium
 Data1: Ununhexium
 Data1: Ununpentium
 Data1: Ununtrium
 On This Day... 13 February
 On This Day... 17 February
 On This Day... 24 November
 On This Day... 25 September
 On This Day... 7 February
 Production: Rhenium
 
publisher (1)
 On This Day... 20 January
 
publishing (1)
 Data1: Platinum
 
puc (2)
 Compounds: Plutonium
 Reactions: Plutonium
 
puckered (1)
 Allotrope: Carbon
 
puddle (1)
 Data1: Tin
 
puf4 (2)
 Compounds: Plutonium
 Reactions: Plutonium
 
puf6 (2)
 Compounds: Plutonium
 Reactions: Plutonium
 
pulling (1)
 Glossary: Shear Modulus
 
pulls (1)
 Glossary: Electronegativity
 
pulmonary (1)
 Data1: Osmium
 
pulp (3)
 Compounds: Chlorine
 Compounds: Sodium
 Compounds: Sulfur
 
pulsating (1)
 Country: Outer space
 
pulse (3)
 Compounds: Iodine
 Compounds: Sodium
 Data1: Praseodymium
 
pulses (1)
 On This Day... 9 May
 
pump (3)
 On This Day... 20 November
 On This Day... 29 August
 On This Day... 31 January
 
pumped (1)
 Biography: Philip Hauge Abelson
 
pumps (1)
 Data1: Mercury
 
pun (3)
 Compounds: Plutonium
 Data1: Gallium
 Reactions: Plutonium
 
pungent (4)
 Compounds: Nitrogen
 Data1: Fluorine
 Data1: Osmium
 Data1: Sulfur
 
punished (1)
 Data1: Tantalum
 
puns (1)
 Data1: Gallium
 
puo (2)
 Compounds: Plutonium
 Reactions: Plutonium
 
puo2 (2)
 Compounds: Plutonium
 Reactions: Plutonium
 
puo2+ (1)
 Reactions: Plutonium
 
puo22+ (1)
 Reactions: Plutonium
 
puobr (1)
 Compounds: Plutonium
 
puocl (1)
 Compounds: Plutonium
 
puoi (1)
 Compounds: Plutonium
 
purchase (1)
 Production: Uranium
 
purchased (1)
 Biography: Smithson Tennant
 
purchaser (1)
 Production: Uranium
 
purchasing (1)
 Production: Uranium
 
pure (101)
 Allotrope: Carbon
 Biography: Adair Crawford
 Biography: Andre Louis Debierne
 Biography: Andreas Sigismund Marggraf
 Biography: Bernard Courtois
 Biography: Lise Meitner
 Biography: Pierre Curie
 Biography: Robert Wilhelm Bunsen
 Biography: Sir Humphry Davy
 Biography: William Hyde Wollaston
 Compounds: Chlorine
 Compounds: Erbium
 Compounds: Germanium
 Compounds: Magnesium
 Compounds: Radium
 Compounds: Zirconium
 Country: United Kingdom
 Country: United States of America
 Data1: Americium
 Data1: Barium
 Data1: Bohrium
 Data1: Boron
 Data1: Cadmium
 Data1: Calcium
 Data1: Cerium
 Data1: Chlorine
 Data1: Copper
 Data1: Darmstadtium
 Data1: Dubnium
 Data1: Dysprosium
 Data1: Erbium
 Data1: Fluorine
 Data1: Francium
 Data1: Gallium
 Data1: Gold
 Data1: Hassium
 Data1: Helium
 Data1: Indium
 Data1: Lanthanum
 Data1: Lawrencium
 Data1: Lutetium
 Data1: Magnesium
 Data1: Manganese
 Data1: Meitnerium
 Data1: Neodymium
 Data1: Nickel
 Data1: Niobium
 Data1: Nobelium
 Data1: Osmium
 Data1: Plutonium
 Data1: Praseodymium
 Data1: Protactinium
 Data1: Radium
 Data1: Rutherfordium
 Data1: Samarium
 Data1: Scandium
 Data1: Seaborgium
 Data1: Silver
 Data1: Strontium
 Data1: Sulfur
 Data1: Tantalum
 Data1: Terbium
 Data1: Thallium
 Data1: Thulium
 Data1: Tin
 Data1: Titanium
 Data1: Ytterbium
 Data1: Zirconium
 Glossary: Alloy
 Glossary: Base
 Glossary: Electron Capture
 Glossary: Electronegativity
 Glossary: IUPAC
 Glossary: Melting Point (freezing point)
 Glossary: Thermal Conductivity
 Isotope: Carbon
 On This Day... 11 March
 On This Day... 12 December
 On This Day... 28 November
 Production: Aluminium
 Production: Barium
 Production: Boron
 Production: Caesium
 Production: Helium
 Production: Iron
 Production: Lead
 Production: Lutetium
 Production: Neptunium
 Production: Plutonium
 Production: Samarium
 Production: Silicon
 Production: Silver
 Production: Sodium
 Production: Technetium
 Production: Thulium
 Production: Uranium
 Production: Zinc
 Reactions: Bromine
 Reactions: Chromium
 Reactions: Fluorine
 Reactions: Titanium
 
purely (12)
 Biography: Julius Caesar Scaliger
 Data1: Lawrencium
 Data1: Mendelevium
 Data1: Plutonium
 Data1: Ununbium
 Data1: Ununhexium
 Data1: Ununoctium
 Data1: Ununpentium
 Data1: Ununquadium
 Data1: Ununseptium
 Data1: Ununtrium
 Glossary: Moh's Scale of Hardness
 
purest (1)
 Data1: Mercury
 
purex (1)
 Production: Technetium
 
purged (1)
 Production: Radon
 
purification (17)
 Biography: Joseph W. Kennedy
 Compounds: Aluminium
 Compounds: Fluorine
 Compounds: Lithium
 Data1: Bromine
 Data1: Chlorine
 Data1: Europium
 Data1: Francium
 Data1: Hafnium
 Data1: Lanthanum
 Data1: Neodymium
 Data1: Oxygen
 Data1: Samarium
 Data1: Thulium
 Production: Gallium
 Production: Helium
 Production: Zinc
 
purified (10)
 Data1: Boron
 Data1: Francium
 Data1: Lanthanum
 Data1: Neodymium
 Data1: Silicon
 Production: Argon
 Production: Boron
 Production: Helium
 Production: Iodine
 Production: Phosphorus
 
purifiers (1)
 Compounds: Lithium
 
purify (5)
 Biography: Marie Curie (Marya Sklodowska)
 Data1: Lanthanum
 Data1: Osmium
 Data1: Thulium
 Production: Helium
 
purifying (3)
 Biography: Marguerite Catherine Perey
 On This Day... 2 February
 Production: Gold
 
purities (3)
 Data1: Neodymium
 Production: Gallium
 Production: Silver
 
purity (17)
 Biography: Joseph Louis Gay-Lussac
 Compounds: Cobalt
 Compounds: Magnesium
 Country: United Kingdom
 Data1: Boron
 Data1: Copper
 Data1: Germanium
 Data1: Gold
 Data1: Neodymium
 Data1: Niobium
 Data1: Thorium
 Data1: Titanium
 Glossary: Reagent
 Glossary: Thermal Conductivity
 Production: Germanium
 Production: Technetium
 Production: Zinc
 
purple (9)
 Compounds: Barium
 Compounds: Fluorine
 Compounds: Lithium
 Compounds: Radium
 Data1: Iodine
 Data1: Neodymium
 Data1: Potassium
 Data1: Rubidium
 Glossary: Allotrope
 
purported (1)
 Glossary: pH
 
purpose (5)
 Biography: Pierre Jules César Janssen
 Compounds: Sodium
 Data1: Bismuth
 Data1: Zinc
 Glossary: Spontaneous Fission
 
purposes (3)
 Biography: (Gabriel) Daniel Fahrenheit
 Compounds: Titanium
 Glossary: Gamma Ray
 
pursue (4)
 Biography: Jöns Jacob Berzelius
 Biography: William Gregor
 Biography: William Hyde Wollaston
 Data1: Iodine
 
pursued (1)
 Biography: Joseph Priestley
 
pursuits (1)
 Biography: Julius Caesar Scaliger
 
pusi2 (2)
 Compounds: Plutonium
 Reactions: Plutonium
 
putting (1)
 Data1: Lead
 
putty (1)
 Compounds: Silicon
 
pux3 (2)
 Compounds: Plutonium
 Reactions: Plutonium
 
pv (2)
 Glossary: Ideal Gas
 On This Day... 14 October
 
pvc (2)
 Compounds: Chlorine
 Compounds: Iron
 
pyle (1)
 Data1: Fermium
 
pyotr (2)
 Data1: Helium
 On This Day... 9 July
 
pyramid (2)
 Data1: Copper
 Glossary: Vickers Hardness
 
pyrargyrite (1)
 Production: Silver
 
pyrenees (1)
 Data1: Gallium
 
pyridine (2)
 Biography: Sir William Ramsay
 On This Day... 28 July
 
pyrite (2)
 Data1: Sulfur
 Production: Sulfur
 
pyrites (2)
 Data1: Thallium
 Production: Thallium
 
pyrochlore (2)
 Data1: Niobium
 Production: Niobium
 
pyroelectric (2)
 Compounds: Lithium
 Compounds: Tantalum
 
pyrolusite (2)
 Data1: Manganese
 Production: Manganese
 
pyrolysis (2)
 Allotrope: Carbon
 On This Day... 17 October
 
pyrolytic (1)
 Allotrope: Carbon
 
pyromet (1)
 Data1: Sodium
 
pyrometallurgical (1)
 Production: Zinc
 
pyrometallurgy (2)
 Production: Lead
 Production: Zinc
 
pyrophoric (11)
 Compounds: Silicon
 Compounds: Zirconium
 Data1: Hafnium
 Data1: Nickel
 Data1: Uranium
 Document: The Lanthanoid Series
 Glossary: Pyrophoric
 Reactions: Hafnium
 Reactions: Iron
 Reactions: Nickel
 Reactions: Tungsten
 
pyrophoricity (1)
 Glossary: Pyrophoric
 
pyrophosphate (1)
 Compounds: Sodium
 
pyrotechnic (2)
 Compounds: Phosphorus
 Compounds: Strontium
 
pyroxene (1)
 Production: Molybdenum
 
pyroxenes (1)
 Production: Calcium
 
pyroxenite (1)
 Production: Ruthenium
 
pyroxinite (1)
 Data1: Ruthenium
 
pyruvate (1)
 Production: Hydrogen
 
pzt (1)
 Compounds: Barium