ABCDEFGHIJKLMNOPQRSTUVWXYZ
t1 (1)
 Equation: van't Hoff equation
 
t2 (1)
 Equation: van't Hoff equation
 
t3 (1)
 Compounds: Iodine
 
t4 (1)
 Compounds: Iodine
 
ta (19)
 Atomic data: Tantalum
 Data1: Dysprosium
 Data1: Erbium
 Data1: Niobium
 Data1: Rhenium
 Data1: Samarium
 Data1: Scandium
 Data1: Tantalum
 Data1: Terbium
 Data1: Thulium
 Data2: Tantalum
 Isotope: Hafnium
 Isotope: Rhenium
 Isotope: Tantalum
 Isotope: Tungsten
 Production: Niobium
 Production: Terbium
 Reactions: Tantalum
 Spectrum: Tantalum
 
ta+ (1)
 Atomic data: Tantalum
 
ta+1 (1)
 Data2: Tantalum
 
ta+2 (1)
 Data2: Tantalum
 
ta+3 (1)
 Data2: Tantalum
 
ta+5 (1)
 Data2: Tantalum
 
ta+6 (1)
 Data2: Tantalum
 
ta2o5 (2)
 Compounds: Tantalum
 Reactions: Tantalum
 
ta2o6 (2)
 Data1: Tantalum
 Production: Tantalum
 
tables (4)
 Biography: Johan Gadolin
 Biography: Jöns Jacob Berzelius
 Document: Understanding Electron Configuration Tables
 Production: Radon
 
tablet (2)
 Data1: Magnesium
 Data1: Zinc
 
tablets (3)
 Compounds: Calcium
 Data1: Iodine
 Data1: Magnesium
 
tableware (1)
 Data1: Gold
 
tabr5 (1)
 Reactions: Tantalum
 
tabulated (2)
 Biography: Robert Wilhelm Bunsen
 On This Day... 16 February
 
tac (1)
 Compounds: Tantalum
 
tacke (4)
 Biography: Ida Eva Tacke Noddack
 Biography: Walter Noddack
 Data1: Rhenium
 Data1: Technetium
 
tacl5 (1)
 Reactions: Tantalum
 
tacoma (2)
 Biography: Philip Hauge Abelson
 On This Day... 27 April
 
taconite (1)
 Production: Iron
 
tact (1)
 Glossary: Molecule
 
tadeus (1)
 On This Day... 20 July
 
taf5 (1)
 Reactions: Tantalum
 
taher (1)
 On This Day... 18 August
 
tahya (1)
 Country: Turkey
 
tai5 (1)
 Reactions: Tantalum
 
tail (1)
 On This Day... 11 September
 
tailings (3)
 Production: Indium
 Production: Lead
 Production: Uranium
 
tainton (1)
 Production: Zinc
 
taiwan (1)
 Country: Taiwan
 
tajikistan (2)
 Country: Tajikistan
 Production: Antimony
 
taken (18)
 Biography: (Gabriel) Daniel Fahrenheit
 Biography: Irene Joliot-Curie
 Biography: Michael Faraday
 Compounds: Gold
 Compounds: Lanthanum
 Data1: Arsenic
 Data1: Bohrium
 Data1: Francium
 Data1: Hafnium
 Data1: Iodine
 Data1: Lead
 Data1: Plutonium
 Equation: Molar heat capacity
 Equation: Specific heat capacity to heat equation
 Production: Cadmium
 Production: Magnesium
 Production: Molybdenum
 Production: Radon
 
takes (7)
 Compounds: Hydrogen
 Data1: Phosphorus
 Glossary: Atomic Charge
 Glossary: Plasma
 Production: Palladium
 Reactions: Silicon
 Reactions: Strontium
 
taking (5)
 Biography: Jöns Jacob Berzelius
 Biography: Pierre Jules César Janssen
 Biography: William Hyde Wollaston
 Compounds: Iron
 Equation: Henry's Law
 
talc (2)
 Data1: Magnesium
 Production: Magnesium
 
tale (1)
 Data1: Phosphorus
 
talent (1)
 Biography: Irene Joliot-Curie
 
talents (1)
 Biography: Julius Caesar Scaliger
 
talij (1)
 Names: Thallium
 
talk (1)
 Glossary: X-Rays
 
tall (1)
 Production: Radon
 
tallio (1)
 Names: Thallium
 
tan (1)
 Compounds: Tantalum
 
tang (1)
 Data1: Cobalt
 
tank (3)
 Data1: Titanium
 Isotope: Cobalt
 Production: Radon
 
tanks (3)
 Data1: Molybdenum
 Data1: Uranium
 Document: The Actinoid Series
 
tannic (1)
 Glossary: Acid
 
tanning (4)
 Biography: Sir Humphry Davy
 Compounds: Aluminium
 Compounds: Sodium
 Data1: Chromium
 
tantaal (1)
 Names: Tantalum
 
tantal (1)
 Names: Tantalum
 
tantalate (2)
 Compounds: Lithium
 Compounds: Tantalum
 
tantale (1)
 Names: Tantalum
 
tantalic (1)
 Data1: Tantalum
 
tantalio (1)
 Names: Tantalum
 
tantalite (4)
 Data1: Niobium
 Data1: Tantalum
 Production: Niobium
 Production: Tantalum
 
tantalium (1)
 Data1: Tantalum
 
tantalize (1)
 Data1: Tantalum
 
tantalized (1)
 Data1: Tantalum
 
tantalizing (1)
 Data1: Tantalum
 
tantalo (1)
 Names: Tantalum
 
tantalum (17)
 Atomic data: Tantalum
 Biography: Anders Gustaf Ekeberg
 Biography: Ferdinand Frederic Henri Moissan
 Compounds: Tantalum
 Data1: Hafnium
 Data1: Niobium
 Data1: Tantalum
 Data2: Tantalum
 Document: Abundance of the Elements in the Solar System
 Isotope: Tantalum
 MAC data: Tantalum
 Names: Tantalum
 Production: Niobium
 Production: Tantalum
 Reactions: Dubnium
 Reactions: Tantalum
 Spectrum: Tantalum
 
tantalus (2)
 Data1: Niobium
 Data1: Tantalum
 
tanzania (1)
 Country: Tanzania
 
tap (2)
 Compounds: Nitrogen
 Data1: Tin
 
tape (3)
 Compounds: Chromium
 Data1: Chromium
 Data1: Lawrencium
 
tapes (1)
 Data1: Chromium
 
tapped (1)
 Production: Aluminium
 
tar (3)
 Data1: Sulfur
 Data1: Vanadium
 Production: Vanadium
 
tara (1)
 Production: Zinc
 
target (22)
 Allotrope: Carbon
 Data1: Berkelium
 Data1: Californium
 Data1: Curium
 Data1: Darmstadtium
 Data1: Dubnium
 Data1: Fermium
 Data1: Lawrencium
 Data1: Meitnerium
 Data1: Mendelevium
 Data1: Nobelium
 Data1: Roentgenium
 Data1: Rutherfordium
 Data1: Ununbium
 Production: Astatine
 Production: Berkelium
 Production: Californium
 Production: Curium
 Production: Lawrencium
 Production: Mendelevium
 Production: Nobelium
 Production: Technetium
 
targeted (1)
 Isotope: Actinium
 
targets (1)
 Data1: Lithium
 
tarnish (6)
 Data1: Potassium
 Document: The Actinoid Series
 Document: The Lanthanoid Series
 Glossary: Lanthanides (old name)
 Glossary: Lanthanoids
 Reactions: Arsenic
 
tarnishes (24)
 Data1: Americium
 Data1: Thallium
 Reactions: Actinium
 Reactions: Caesium
 Reactions: Cerium
 Reactions: Dysprosium
 Reactions: Erbium
 Reactions: Holmium
 Reactions: Lanthanum
 Reactions: Lutetium
 Reactions: Neodymium
 Reactions: Potassium
 Reactions: Praseodymium
 Reactions: Rhenium
 Reactions: Rubidium
 Reactions: Samarium
 Reactions: Scandium
 Reactions: Technetium
 Reactions: Terbium
 Reactions: Thallium
 Reactions: Thorium
 Reactions: Thulium
 Reactions: Yttrium
 Reactions: Zinc
 
tartar (1)
 Compounds: Sodium
 
tartaric (4)
 Biography: Karl Wilhelm Scheele
 Data2: Silver
 Glossary: Acid
 On This Day... 27 December
 
tartu (1)
 Data1: Ruthenium
 
task (2)
 Biography: Jöns Jacob Berzelius
 Biography: Robert Wilhelm Bunsen
 
taste (8)
 Compounds: Calcium
 Compounds: Carbon
 Compounds: Nitrogen
 Compounds: Sodium
 Compounds: Sulfur
 Data1: Beryllium
 Data1: Magnesium
 Glossary: Acid
 
tasted (1)
 Data1: Chlorine
 
tasteless (1)
 Data1: Hydrogen
 
tastes (1)
 Compounds: Calcium
 
tatum (1)
 Biography: Michael Faraday
 
tau (2)
 Glossary: Anti-Neutrino
 Glossary: Neutrino
 
taught (6)
 Biography: Emilio Gino Segre
 Biography: Enrico Fermi
 Biography: Ferdinand Reich
 Biography: Johan Gadolin
 Biography: Robert Wilhelm Bunsen
 Biography: Walter Noddack
 
tautomerism (1)
 On This Day... 14 January
 
tautona (1)
 Country: South Africa
 
tax (1)
 Biography: Antoine-Laurent de Lavoisier
 
taylor (1)
 Compounds: Nitrogen
 
tb (5)
 Atomic data: Terbium
 Data1: Terbium
 Isotope: Terbium
 Reactions: Terbium
 Spectrum: Terbium
 
tb+ (1)
 Atomic data: Terbium
 
tb+3 (1)
 Data2: Terbium
 
tb+4 (1)
 Data2: Terbium
 
tb0 (2)
 Compounds: Dysprosium
 Compounds: Terbium
 
tb3+ (1)
 Reactions: Terbium
 
tb4o7 (1)
 Reactions: Terbium
 
tbbr3 (1)
 Reactions: Terbium
 
tbcl3 (1)
 Reactions: Terbium
 
tbf3 (1)
 Reactions: Terbium
 
tbi3 (1)
 Reactions: Terbium
 
tbq (2)
 Production: Ruthenium
 Production: Technetium
 
tc (10)
 Atomic data: Technetium
 Country: Outer space
 Data1: Technetium
 Data2: Technetium
 Isotope: Molybdenum
 Isotope: Ruthenium
 Isotope: Technetium
 Production: Technetium
 Reactions: Technetium
 Spectrum: Technetium
 
tc+ (1)
 Atomic data: Technetium
 
tc+4 (1)
 Data2: Technetium
 
tc+5 (1)
 Data2: Technetium
 
tc+6 (1)
 Data2: Technetium
 
tc+7 (1)
 Data2: Technetium
 
tc0 (1)
 Data2: Technetium
 
tc2o7 (1)
 Reactions: Technetium
 
tcf6 (1)
 Reactions: Technetium
 
tcf7 (1)
 Reactions: Technetium
 
tco4 (1)
 Production: Technetium
 
tdi (1)
 Compounds: Chlorine
 
te (10)
 Atomic data: Tellurium
 Data1: Tellurium
 Data2: Tellurium
 Glossary: Non-Metals
 Isotope: Antimony
 Isotope: Tellurium
 Isotope: Xenon
 On This Day... 1 July
 Reactions: Tellurium
 Spectrum: Tellurium
 
te+ (1)
 Atomic data: Tellurium
 
te+2 (1)
 Data2: Tellurium
 
te+4 (1)
 Data2: Tellurium
 
te+5 (1)
 Data2: Tellurium
 
te+6 (1)
 Data2: Tellurium
 
te0 (1)
 Data2: Tellurium
 
te2 (1)
 Reactions: Tellurium
 
te3cl2 (1)
 Reactions: Tellurium
 
te4+ (1)
 Reactions: Tellurium
 
te8 (1)
 Reactions: Tellurium
 
tea (1)
 Glossary: Acid
 
teacher (6)
 Biography: Enrico Fermi
 Biography: Hans Christian Oersted
 Biography: Jöns Jacob Berzelius
 Biography: Louis Jacques Thenard
 Biography: Per Teodor Cleve
 On This Day... 31 December
 
teachers (2)
 Biography: Joseph W. Kennedy
 Biography: Louis Jacques Thenard
 
teaching (2)
 Biography: Glenn Theodore Seaborg
 Biography: Jöns Jacob Berzelius
 
teallite (1)
 Production: Tin
 
team (26)
 Allotrope: Carbon
 Data1: Americium
 Data1: Berkelium
 Data1: Bohrium
 Data1: Californium
 Data1: Curium
 Data1: Dubnium
 Data1: Einsteinium
 Data1: Fermium
 Data1: Francium
 Data1: Hassium
 Data1: Lawrencium
 Data1: Meitnerium
 Data1: Mendelevium
 Data1: Neptunium
 Data1: Nobelium
 Data1: Roentgenium
 Data1: Scandium
 Data1: Seaborgium
 Data1: Technetium
 Data1: Ununoctium
 Glossary: Doubly Magic
 Isotope: Hassium
 Production: Einsteinium
 Production: Fermium
 Production: Nobelium
 
teams (2)
 Data1: Francium
 Data1: Plutonium
 
teased (1)
 Data1: Terbium
 
teaspoon (3)
 Data1: Astatine
 Data1: Chromium
 Production: Astatine
 
tebr4 (1)
 Reactions: Tellurium
 
tech (1)
 Compounds: Titanium
 
techentium (1)
 Reactions: Technetium
 
technecium (1)
 Names: Technetium
 
technetium (17)
 Atomic data: Technetium
 Biography: Emilio Gino Segre
 Biography: Walter Noddack
 Compounds: Technetium
 Country: Outer space
 Data1: Technetium
 Data2: Technetium
 Glossary: Abundance
 Glossary: Gamma Ray
 Isotope: Technetium
 MAC data: Technetium
 Names: Technetium
 Production: Technetium
 Reactions: Bohrium
 Reactions: Rhenium
 Reactions: Technetium
 Spectrum: Technetium
 
technetos (1)
 Data1: Technetium
 
technical (4)
 Biography: Ida Eva Tacke Noddack
 Biography: Peter Armbruster
 Glossary: Doubly Magic
 Isotope: Hassium
 
technically (4)
 Biography: Dmitriy Ivanovich Mendeleyev
 Data1: Plutonium
 Glossary: Electron Volt
 Glossary: pH
 
technician (1)
 Biography: Robert Wilhelm Bunsen
 
technique (9)
 Biography: Gustav Robert Kirchhoff
 Data1: Lanthanum
 Data1: Zinc
 Glossary: Gamma Ray
 Glossary: Positron Emission (Beta+ Decay)
 Glossary: Spontaneous Fission
 On This Day... 22 February
 Production: Germanium
 Reactions: Helium
 
techniques (14)
 Biography: Jöns Jacob Berzelius
 Biography: Julius Caesar Scaliger
 Biography: Robert Wilhelm Bunsen
 Data1: Dysprosium
 Data1: Meitnerium
 Data1: Terbium
 Glossary: Aqua regia
 Production: Erbium
 Production: Gadolinium
 Production: Ruthenium
 Production: Samarium
 Production: Thulium
 Production: Ytterbium
 Production: Yttrium
 
technische (1)
 Biography: Walter Noddack
 
technocracy (1)
 Biography: Frederick Soddy
 
technological (3)
 Biography: Dmitriy Ivanovich Mendeleyev
 Biography: Robert Wilhelm Bunsen
 Data1: Zinc
 
technologies (3)
 Allotrope: Carbon
 Data1: Dysprosium
 Production: Aluminium
 
technology (19)
 Biography: Charles Hatchett
 Biography: Clemens Alexander Winkler
 Biography: Edwin Mattison McMillan
 Biography: Irene Joliot-Curie
 Biography: Michael Faraday
 Biography: Morris Travers
 Data1: Cerium
 Data1: Europium
 Data1: Magnesium
 Data1: Neodymium
 Data1: Praseodymium
 Data1: Samarium
 Data1: Tantalum
 Data1: Terbium
 Data1: Zinc
 Glossary: Rare Earth Elements
 On This Day... 11 April
 On This Day... 19 January
 On This Day... 26 February
 
teck (1)
 Country: Canada
 
teckcominco (1)
 Production: Indium
 
tecl4 (1)
 Reactions: Tellurium
 
tecnecio (1)
 Names: Technetium
 
tecneto (1)
 Names: Technetium
 
tectonics (1)
 Production: Uranium
 
teenager (1)
 Biography: Albert Ghiorso
 
teeth (7)
 Compounds: Potassium
 Compounds: Sodium
 Data1: Calcium
 Data1: Gold
 Data1: Phosphorus
 Data1: Strontium
 Isotope: Strontium
 
tef4 (1)
 Reactions: Tellurium
 
tef6 (1)
 Reactions: Tellurium
 
teflon (5)
 Compounds: Fluorine
 Compounds: Molybdenum
 Data1: Fluorine
 Glossary: Halogens
 Production: Fluorine
 
tehnecij (1)
 Names: Technetium
 
tei4 (1)
 Reactions: Tellurium
 
teil (1)
 Biography: Ida Eva Tacke Noddack
 
teknetium (1)
 Names: Technetium
 
tektites (1)
 Production: Silicon
 
telecommunication (1)
 Data1: Palladium
 
telephone (1)
 Data1: Rhodium
 
telescope (2)
 Allotrope: Sulfur
 Data1: Beryllium
 
telescopes (4)
 Biography: Robert Wilhelm Bunsen
 Compounds: Fluorine
 Country: Outer space
 Data1: Californium
 
television (4)
 Allotrope: Oxygen
 Data1: Cadmium
 Data1: Europium
 Data1: Strontium
 
televisions (2)
 Data1: Europium
 Production: Indium
 
telling (2)
 Biography: Robert Wilhelm Bunsen
 Data1: Carbon
 
tello (1)
 Data1: Antimony
 
tells (1)
 Data1: Phosphorus
 
tellur (1)
 Names: Tellurium
 
tellure (1)
 Names: Tellurium
 
telluride (7)
 Compounds: Bismuth
 Compounds: Cadmium
 Compounds: Rubidium
 Compounds: Tellurium
 Compounds: Zinc
 Data1: Cadmium
 Data1: Tellurium
 
tellurides (1)
 Production: Tellurium
 
tellurio (1)
 Names: Tellurium
 
tellurium (27)
 Atomic data: Tellurium
 Biography: Franz-Joseph Muller Freiherr von Reichenstein
 Biography: Martin Heinrich Klaproth
 Compounds: Tellurium
 Country: Canada
 Country: Japan
 Country: Peru
 Country: United States of America
 Data1: Selenium
 Data1: Tellurium
 Data1: Thallium
 Data2: Cadmium
 Data2: Platinum
 Data2: Tellurium
 Document: Abundance of the Elements in the Solar System
 Document: Chemical makeup of the human body
 Isotope: Iodine
 Isotope: Tellurium
 MAC data: Tellurium
 Names: Tellurium
 On This Day... 1 July
 On This Day... 13 April
 On This Day... 8 May
 Production: Tellurium
 Reactions: Tellurium
 Reactions: Ununhexium
 Spectrum: Tellurium
 
tellus (2)
 Biography: Martin Heinrich Klaproth
 Data1: Tellurium
 
telluur (1)
 Names: Tellurium
 
telurij (1)
 Names: Tellurium
 
telurio (1)
 Names: Tellurium
 
teluro (1)
 Names: Tellurium
 
temeperature (1)
 Reactions: Phosphorus
 
temp (3)
 Data2: Hydrogen
 Data2: Magnesium
 Data2: Phosphorus
 
temperate (1)
 Reactions: Molybdenum
 
temperature (271)
 Allotrope: Arsenic
 Allotrope: Carbon
 Allotrope: Oxygen
 Allotrope: Phosphorus
 Allotrope: Plutonium
 Allotrope: Sulfur
 Allotrope: Ytterbium
 Biography: (Gabriel) Daniel Fahrenheit
 Biography: Joseph Louis Gay-Lussac
 Biography: Morris Travers
 Biography: Pierre Curie
 Biography: Robert Wilhelm Bunsen
 Compounds: Barium
 Compounds: Bismuth
 Compounds: Chromium
 Compounds: Copper
 Compounds: Hafnium
 Compounds: Helium
 Compounds: Iodine
 Compounds: Lithium
 Compounds: Magnesium
 Compounds: Niobium
 Compounds: Phosphorus
 Compounds: Samarium
 Compounds: Silicon
 Compounds: Strontium
 Compounds: Thallium
 Compounds: Tin
 Compounds: Vanadium
 Compounds: Zirconium
 Country: Outer space
 Data1: Aluminium
 Data1: Americium
 Data1: Argon
 Data1: Arsenic
 Data1: Beryllium
 Data1: Bromine
 Data1: Cadmium
 Data1: Caesium
 Data1: Cerium
 Data1: Chlorine
 Data1: Fermium
 Data1: Fluorine
 Data1: Gadolinium
 Data1: Gallium
 Data1: Hafnium
 Data1: Helium
 Data1: Hydrogen
 Data1: Indium
 Data1: Iodine
 Data1: Iridium
 Data1: Krypton
 Data1: Lanthanum
 Data1: Lead
 Data1: Lithium
 Data1: Lutetium
 Data1: Mercury
 Data1: Molybdenum
 Data1: Neon
 Data1: Niobium
 Data1: Nitrogen
 Data1: Osmium
 Data1: Oxygen
 Data1: Phosphorus
 Data1: Platinum
 Data1: Potassium
 Data1: Protactinium
 Data1: Radon
 Data1: Rhenium
 Data1: Rubidium
 Data1: Ruthenium
 Data1: Scandium
 Data1: Selenium
 Data1: Sodium
 Data1: Sulfur
 Data1: Tantalum
 Data1: Technetium
 Data1: Thallium
 Data1: Thorium
 Data1: Tin
 Data1: Titanium
 Data1: Tungsten
 Data1: Uranium
 Data1: Vanadium
 Data1: Xenon
 Data1: Yttrium
 Data1: Zinc
 Data1: Zirconium
 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 Alkaline Earth Metals (Group 2)
 Document: The Lanthanoid Series
 Document: The Transition Metals (Groups 3 to 12)
 Equation: Avogadro's law
 Equation: Boyle's Law
 Equation: Charles' Law
 Equation: Combined Gas Law
 Equation: Henry's Law
 Equation: Ideal gas law
 Equation: Molar heat capacity
 Equation: Osmotic pressure
 Equation: Root mean square (RMS) velocity of gas molecules
 Equation: Specific heat capacity to heat equation
 Equation: Temperature in kelvin from degrees celsius conversion
 Equation: van't Hoff equation
 Glossary: Air
 Glossary: Alkali Metal (alkaline-earth metals)
 Glossary: Alloy
 Glossary: Boiling Point
 Glossary: Centigrade (celsius)
 Glossary: Convection
 Glossary: Critical temperature
 Glossary: Electrical Resistivity
 Glossary: Endothermic
 Glossary: Enthalpy Change of Fusion (Heat of Fusion)
 Glossary: Fahrenheit
 Glossary: Gas
 Glossary: Halogens
 Glossary: Heat Capacity
 Glossary: Ideal Gas
 Glossary: Kelvin (absolute temperature)
 Glossary: Magnetic Ordering
 Glossary: Pyrophoric
 Glossary: Semiconductor
 Glossary: Specific heat
 Glossary: Speed of Sound
 Glossary: Standard Temperature and Pressure (STP)
 Glossary: Superconducting temperature
 Glossary: Temperature
 Glossary: Thermal Conductivity
 Glossary: Thermal Expansion
 On This Day... 19 December
 On This Day... 20 February
 On This Day... 26 June
 On This Day... 4 August
 On This Day... 8 October
 Production: Aluminium
 Production: Fermium
 Production: Helium
 Production: Strontium
 Production: Titanium
 Reactions: Bromine
 Reactions: Chlorine
 Reactions: Chromium
 Reactions: Fluorine
 Reactions: Iodine
 Reactions: Krypton
 Reactions: Lead
 Reactions: Niobium
 Reactions: Phosphorus
 Reactions: Silicon
 Reactions: Tantalum
 Reactions: Titanium
 Reactions: Tungsten
 Reactions: Uranium
 
temperatures (54)
 Allotrope: Carbon
 Allotrope: Sulfur
 Allotrope: Tin
 Biography: John Dalton
 Compounds: Barium
 Compounds: Calcium
 Compounds: Carbon
 Compounds: Neodymium
 Compounds: Nitrogen
 Compounds: Silicon
 Compounds: Titanium
 Compounds: Zirconium
 Country: Outer space
 Data1: Americium
 Data1: Antimony
 Data1: Beryllium
 Data1: Boron
 Data1: Caesium
 Data1: Helium
 Data1: Iodine
 Data1: Lithium
 Data1: Molybdenum
 Data1: Nitrogen
 Data1: Osmium
 Data1: Palladium
 Data1: Protactinium
 Data1: Radon
 Data1: Ruthenium
 Data1: Tantalum
 Data1: Titanium
 Data1: Tungsten
 Data1: Zirconium
 Document: The Lanthanoid Series
 Equation: Boyle's Law
 Equation: Ideal gas law
 Glossary: Electrical Resistivity
 Glossary: Magnetic Ordering
 Glossary: Refractory
 Glossary: Semiconductor
 Glossary: Temperature
 On This Day... 29 March
 Production: Boron
 Production: Helium
 Production: Hydrogen
 Production: Iron
 Production: Magnesium
 Production: Rhenium
 Reactions: Boron
 Reactions: Carbon
 Reactions: Molybdenum
 Reactions: Nickel
 Reactions: Silicon
 Reactions: Tungsten
 Reactions: Uranium
 
temporarily (3)
 Biography: Irene Joliot-Curie
 Compounds: Nitrogen
 Data1: Helium
 
temporary (10)
 Biography: Sir Humphry Davy
 Compounds: Bismuth
 Data1: Bohrium
 Data1: Dubnium
 Data1: Hassium
 Data1: Lawrencium
 Data1: Meitnerium
 Data1: Roentgenium
 Data1: Rutherfordium
 Data1: Seaborgium
 
tenacious (1)
 Biography: Julius Caesar Scaliger
 
tenant (2)
 Data1: Iridium
 Data1: Osmium
 
tend (4)
 Data1: Zinc
 Document: The Transition Metals (Groups 3 to 12)
 Glossary: Metalloids
 Production: Aluminium
 
tended (2)
 Biography: Jöns Jacob Berzelius
 Biography: Philip Hauge Abelson
 
tendency (5)
 Biography: Julius Caesar Scaliger
 Document: The Halogens (Group 17)
 Glossary: Noble Gasses (inert gasses)
 Glossary: Poisson Ratio
 Glossary: Temperature
 
tends (7)
 Compounds: Plutonium
 Data1: Berkelium
 Data1: Hydrogen
 Data1: Rubidium
 Glossary: Poisson Ratio
 Glossary: X-Rays
 Production: Cobalt
 
tenn (1)
 Names: Tin
 
tennant (4)
 Biography: Smithson Tennant
 Data1: Iridium
 Data1: Osmium
 On This Day... 30 November
 
tennantite (1)
 Biography: Smithson Tennant
 
tennessee (5)
 Biography: Philip Hauge Abelson
 Data1: Einsteinium
 Data1: Plutonium
 Production: Einsteinium
 Production: Phosphorus
 
tennis (1)
 Data1: Boron
 
tensile (4)
 Data1: Rhenium
 Data1: Titanium
 Document: The Transition Metals (Groups 3 to 12)
 Glossary: Alloy
 
tension (3)
 Glossary: Temperature
 Glossary: Young's Modulus
 On This Day... 24 June
 
tensions (3)
 Data1: Einsteinium
 Data1: Fermium
 Production: Einsteinium
 
tentatively (1)
 Data1: Polonium
 
tenth (2)
 Data1: Actinium
 Data1: Iron
 
tenure (2)
 Biography: Dmitriy Ivanovich Mendeleyev
 Biography: Robert Wilhelm Bunsen
 
teo2 (1)
 Reactions: Tellurium
 
teo2+ (1)
 Reactions: Tellurium
 
teo32 (1)
 Reactions: Tellurium
 
teo42 (1)
 Reactions: Tellurium
 
teodor (9)
 Biography: Jacques-Louis Soret
 Biography: Per Teodor Cleve
 Compounds: Holmium
 Data1: Helium
 Data1: Holmium
 Data1: Praseodymium
 Data1: Scandium
 Data1: Thulium
 On This Day... 10 February
 
terahertz (4)
 Compounds: Cadmium
 Compounds: Lithium
 Compounds: Tantalum
 Compounds: Zinc
 
teratogen (1)
 Glossary: Carcinogen
 
teratogenesis (1)
 Glossary: Teratogenic
 
teratogenic (4)
 Data1: Indium
 Data1: Uranium
 Data1: Ytterbium
 Glossary: Teratogenic
 
terbia (4)
 Data1: Erbium
 Data1: Terbium
 Data1: Yttrium
 Production: Terbium
 
terbij (1)
 Names: Terbium
 
terbio (1)
 Names: Terbium
 
terbium (17)
 Atomic data: Terbium
 Biography: Carl Gustav Mosander
 Compounds: Dysprosium
 Compounds: Terbium
 Country: China
 Data1: Terbium
 Data1: Yttrium
 Data2: Terbium
 Document: Abundance of the Elements in the Solar System
 Document: The Lanthanoid Series
 Glossary: Rare Earth Elements
 Isotope: Terbium
 Names: Terbium
 Production: Terbium
 Reactions: Berkelium
 Reactions: Terbium
 Spectrum: Terbium
 
terbiun (1)
 MAC data: Terbium
 
terfenol (2)
 Compounds: Dysprosium
 Compounds: Terbium
 
term (34)
 Biography: Ida Eva Tacke Noddack
 Biography: Jöns Jacob Berzelius
 Biography: Sir Humphry Davy
 Biography: William Hyde Wollaston
 Compounds: Magnesium
 Data1: Arsenic
 Data1: Cerium
 Data1: Cobalt
 Data1: Copper
 Data1: Curium
 Data1: Erbium
 Data1: Manganese
 Data1: Mercury
 Data1: Nickel
 Data1: Silver
 Data1: Terbium
 Data1: Titanium
 Data1: Yttrium
 Document: The Halogens (Group 17)
 Document: The Noble Gases (Group 18)
 Glossary: Baryon
 Glossary: Energy Levels
 Glossary: Enthalpy Change of Vapourisation
 Glossary: Inert
 Glossary: Island of Stability
 Glossary: Magnetic Ordering
 Glossary: Metalloids
 Glossary: pH
 Glossary: Rare Earth Elements
 Glossary: Speed of Sound
 Glossary: Teratogenic
 On This Day... 19 September
 On This Day... 7 September
 Production: Technetium
 
termed (5)
 Data1: Copper
 Data1: Silicon
 Glossary: Heat Capacity
 Glossary: Isometric Transition
 Glossary: Magnetic Ordering
 
terminal (2)
 On This Day... 2 November
 Production: Aluminium
 
terminally (1)
 Data1: Plutonium
 
terminology (1)
 Biography: Michael Faraday
 
terms (9)
 Biography: Michael Faraday
 Data1: Actinium
 Glossary: Noble Gasses (inert gasses)
 Glossary: pH
 Glossary: Photon
 Glossary: Radioactivity
 Glossary: X-Rays
 On This Day... 19 April
 Production: Nickel
 
ternary (1)
 Glossary: Alloy
 
terpenes (1)
 On This Day... 27 March
 
terracotta (1)
 Compounds: Barium
 
terrestrial (6)
 Country: Outer space
 Data1: Zirconium
 Isotope: Nickel
 Isotope: Osmium
 Production: Technetium
 Production: Zirconium
 
terrorist (1)
 Compounds: Iodine
 
test (15)
 Allotrope: Arsenic
 Biography: Joseph Louis Gay-Lussac
 Biography: Joseph Priestley
 Compounds: Copper
 Compounds: Palladium
 Data1: Arsenic
 Data1: Einsteinium
 Data1: Francium
 Data1: Plutonium
 Data1: Sodium
 Glossary: Brinell Hardness
 Glossary: Vickers Hardness
 Isotope: Beryllium
 On This Day... 16 December
 Production: Einsteinium
 
testament (1)
 Data1: Gold
 
tested (4)
 Compounds: Nitrogen
 Data1: Carbon
 Glossary: Shear Modulus
 Production: Radon
 
testers (1)
 Data1: Xenon
 
testing (7)
 Biography: Pierre Jules César Janssen
 Data1: Helium
 Data1: Indium
 Glossary: Pyrophoric
 Glossary: Reagent
 Isotope: Krypton
 Production: Technetium
 
tests (9)
 Data1: Francium
 Data1: Gallium
 Data1: Molybdenum
 Data1: Tellurium
 Glossary: Vickers Hardness
 Isotope: Hydrogen
 Isotope: Iodine
 Isotope: Technetium
 Production: Technetium
 
tetra (2)
 Compounds: Iodine
 Reactions: Arsenic
 
tetraborate (1)
 Data1: Boron
 
tetrabromide (1)
 Reactions: Platinum
 
tetrachloride (9)
 Data1: Germanium
 Data1: Titanium
 Data1: Uranium
 Data2: Beryllium
 Data2: Uranium
 Production: Germanium
 Reactions: Astatine
 Reactions: Platinum
 Reactions: Uranium
 
tetrafluoride (5)
 Biography: Karl Wilhelm Scheele
 Compounds: Xenon
 Data1: Silicon
 Reactions: Carbon
 Reactions: Uranium
 
tetragonal (7)
 Allotrope: Boron
 Allotrope: Tin
 Allotrope: Uranium
 Compounds: Zirconium
 Data2: Indium
 Data2: Protactinium
 Data2: Tin
 
tetrahalides (6)
 Reactions: Neptunium
 Reactions: Osmium
 Reactions: Polonium
 Reactions: Selenium
 Reactions: Silicon
 Reactions: Tellurium
 
tetrahedral (2)
 Glossary: Allotrope
 On This Day... 5 September
 
tetrahedrally (2)
 Allotrope: Carbon
 Glossary: Allotrope
 
tetrahydrate (1)
 Data1: Lanthanum
 
tetrahydrates (1)
 Data1: Neodymium
 
tetraiodide (2)
 Data1: Hafnium
 Reactions: Platinum
 
tetrameric (1)
 Reactions: Platinum
 
tetramethylene (1)
 Compounds: Samarium
 
tetranium (1)
 Isotope: Hydrogen
 
tetraoxide (1)
 Data2: Indium
 
tetraoxygen (2)
 Allotrope: Oxygen
 Glossary: Allotrope
 
tetraphosphorus (1)
 Reactions: Phosphorus
 
tetravalency (1)
 Data1: Lanthanum
 
tetroxide (4)
 Compounds: Nitrogen
 Compounds: Xenon
 Data1: Osmium
 Data1: Ruthenium
 
tetryl (1)
 On This Day... 17 April
 
texas (7)
 Biography: Joseph W. Kennedy
 Country: United States of America
 Data1: Helium
 Data1: Sulfur
 On This Day... 21 January
 Production: Carbon
 Production: Helium
 
text (2)
 Biography: Julius Caesar Scaliger
 Glossary: Metalloids
 
textbook (3)
 Biography: Jöns Jacob Berzelius
 Biography: Julius Caesar Scaliger
 Biography: Louis Jacques Thenard
 
textbooks (1)
 Glossary: The Pauling Scale
 
textile (2)
 Compounds: Sodium
 Data1: Boron
 
textiles (6)
 Compounds: Aluminium
 Compounds: Antimony
 Compounds: Boron
 Compounds: Lead
 Compounds: Magnesium
 Data1: Chlorine
 
texts (1)
 On This Day... 27 May
 
tfts (1)
 Data1: Molybdenum
 
th (417)
 Allotrope: Carbon
 Atomic data: Thorium
 Biography: (Gabriel) Daniel Fahrenheit
 Biography: Albert Ghiorso
 Biography: Anders Gustaf Ekeberg
 Biography: Andre Louis Debierne
 Biography: Andreas Sigismund Marggraf
 Biography: Antoine Alexandre Brutus Bussy
 Biography: Antoine-Jerome Balard
 Biography: Antoine-Laurent de Lavoisier
 Biography: Arthur C. Wahl
 Biography: Arthur Jeffrey Dempster
 Biography: Bernard Courtois
 Biography: Carl Auer Baron von Welsbach
 Biography: Carl Gustav Mosander
 Biography: Charles Hatchett
 Biography: Clemens Alexander Winkler
 Biography: Daniel Rutherford
 Biography: Dirk Coster
 Biography: Dmitriy Ivanovich Mendeleyev
 Biography: Edwin Mattison McMillan
 Biography: Enrico Fermi
 Biography: Fausto de Elhuyar y de Suvisa
 Biography: Ferdinand Frederic Henri Moissan
 Biography: Ferdinand Reich
 Biography: Franz-Joseph Muller Freiherr von Reichenstein
 Biography: Friedrich Ernst Dorn
 Biography: George Charles de Hevesy
 Biography: Georges Urbain
 Biography: Glenn Theodore Seaborg
 Biography: Gottfried Münzenberg
 Biography: Gustav Robert Kirchhoff
 Biography: Hans Christian Oersted
 Biography: Henry Cavendish
 Biography: Ida Eva Tacke Noddack
 Biography: Irene Joliot-Curie
 Biography: Jacques-Louis Soret
 Biography: Jean Charles Galissard de Marignac
 Biography: Johan Gadolin
 Biography: Johann August Arfvedson
 Biography: John Dalton
 Biography: John William Strutt Rayleigh
 Biography: Jöns Jacob Berzelius
 Biography: Joseph Louis Gay-Lussac
 Biography: Joseph Priestley
 Biography: Joseph W. Kennedy
 Biography: Juan Jose Elhuyar
 Biography: Karl Klaus
 Biography: Karl Wilhelm Scheele
 Biography: Lise Meitner
 Biography: Louis Jacques Thenard
 Biography: Louis Nicolas Vauquelin
 Biography: Marguerite Catherine Perey
 Biography: Marie Curie (Marya Sklodowska)
 Biography: Michael Faraday
 Biography: Nils Gabriel Sefstrüm
 Biography: Otto Hahn
 Biography: Paul Emile Lecoq de Boisbaudran
 Biography: Per Teodor Cleve
 Biography: Peter Armbruster
 Biography: Philip Hauge Abelson
 Biography: Pierre Curie
 Biography: Pierre Jules César Janssen
 Biography: Robert Wilhelm Bunsen
 Biography: Sir Humphry Davy
 Biography: Sir William Crookes
 Biography: Smithson Tennant
 Biography: Walter Noddack
 Biography: William Gregor
 Biography: William Hyde Wollaston
 Compounds: Cobalt
 Compounds: Copper
 Country: India
 Data1: Chromium
 Data1: Cobalt
 Data1: Darmstadtium
 Data1: Dysprosium
 Data1: Erbium
 Data1: Gallium
 Data1: Gold
 Data1: Hafnium
 Data1: Iron
 Data1: Manganese
 Data1: Neodymium
 Data1: Niobium
 Data1: Oxygen
 Data1: Phosphorus
 Data1: Radium
 Data1: Radon
 Data1: Scandium
 Data1: Sulfur
 Data1: Terbium
 Data1: Thorium
 Data1: Thulium
 Data1: Ununbium
 Data1: Uranium
 Data1: Yttrium
 Document: The Halogens (Group 17)
 Document: Understanding Electron Configuration Tables
 Glossary: Periodic Table
 Glossary: Rare Earth Elements
 Isotope: Actinium
 Isotope: Carbon
 Isotope: Protactinium
 Isotope: Thorium
 Isotope: Uranium
 On This Day... 10 April
 On This Day... 10 August
 On This Day... 10 December
 On This Day... 10 February
 On This Day... 10 January
 On This Day... 10 July
 On This Day... 10 June
 On This Day... 10 March
 On This Day... 10 May
 On This Day... 10 November
 On This Day... 10 October
 On This Day... 10 September
 On This Day... 11 April
 On This Day... 11 August
 On This Day... 11 December
 On This Day... 11 February
 On This Day... 11 January
 On This Day... 11 July
 On This Day... 11 June
 On This Day... 11 March
 On This Day... 11 May
 On This Day... 11 November
 On This Day... 11 October
 On This Day... 11 September
 On This Day... 12 April
 On This Day... 12 August
 On This Day... 12 December
 On This Day... 12 February
 On This Day... 12 January
 On This Day... 12 July
 On This Day... 12 June
 On This Day... 12 March
 On This Day... 12 May
 On This Day... 12 November
 On This Day... 12 October
 On This Day... 12 September
 On This Day... 13 April
 On This Day... 13 August
 On This Day... 13 December
 On This Day... 13 February
 On This Day... 13 January
 On This Day... 13 July
 On This Day... 13 June
 On This Day... 13 March
 On This Day... 13 May
 On This Day... 13 November
 On This Day... 13 October
 On This Day... 13 September
 On This Day... 14 April
 On This Day... 14 August
 On This Day... 14 December
 On This Day... 14 February
 On This Day... 14 January
 On This Day... 14 July
 On This Day... 14 June
 On This Day... 14 March
 On This Day... 14 May
 On This Day... 14 November
 On This Day... 14 October
 On This Day... 14 September
 On This Day... 15 April
 On This Day... 15 August
 On This Day... 15 December
 On This Day... 15 February
 On This Day... 15 January
 On This Day... 15 July
 On This Day... 15 June
 On This Day... 15 March
 On This Day... 15 May
 On This Day... 15 November
 On This Day... 15 October
 On This Day... 15 September
 On This Day... 16 April
 On This Day... 16 August
 On This Day... 16 December
 On This Day... 16 February
 On This Day... 16 January
 On This Day... 16 July
 On This Day... 16 June
 On This Day... 16 March
 On This Day... 16 May
 On This Day... 16 November
 On This Day... 16 October
 On This Day... 16 September
 On This Day... 17 April
 On This Day... 17 August
 On This Day... 17 December
 On This Day... 17 February
 On This Day... 17 January
 On This Day... 17 July
 On This Day... 17 June
 On This Day... 17 March
 On This Day... 17 May
 On This Day... 17 November
 On This Day... 17 October
 On This Day... 17 September
 On This Day... 18 April
 On This Day... 18 August
 On This Day... 18 December
 On This Day... 18 February
 On This Day... 18 January
 On This Day... 18 July
 On This Day... 18 June
 On This Day... 18 March
 On This Day... 18 May
 On This Day... 18 November
 On This Day... 18 October
 On This Day... 18 September
 On This Day... 19 April
 On This Day... 19 August
 On This Day... 19 December
 On This Day... 19 February
 On This Day... 19 January
 On This Day... 19 July
 On This Day... 19 June
 On This Day... 19 March
 On This Day... 19 May
 On This Day... 19 November
 On This Day... 19 October
 On This Day... 19 September
 On This Day... 20 April
 On This Day... 20 August
 On This Day... 20 December
 On This Day... 20 February
 On This Day... 20 January
 On This Day... 20 July
 On This Day... 20 June
 On This Day... 20 March
 On This Day... 20 May
 On This Day... 20 November
 On This Day... 20 October
 On This Day... 20 September
 On This Day... 23 August
 On This Day... 23 February
 On This Day... 23 January
 On This Day... 23 July
 On This Day... 24 April
 On This Day... 24 August
 On This Day... 24 December
 On This Day... 24 February
 On This Day... 24 January
 On This Day... 24 July
 On This Day... 24 June
 On This Day... 24 March
 On This Day... 24 May
 On This Day... 24 November
 On This Day... 24 October
 On This Day... 24 September
 On This Day... 25 April
 On This Day... 25 August
 On This Day... 25 December
 On This Day... 25 February
 On This Day... 25 January
 On This Day... 25 July
 On This Day... 25 June
 On This Day... 25 March
 On This Day... 25 May
 On This Day... 25 November
 On This Day... 25 October
 On This Day... 25 September
 On This Day... 26 April
 On This Day... 26 August
 On This Day... 26 December
 On This Day... 26 February
 On This Day... 26 January
 On This Day... 26 July
 On This Day... 26 June
 On This Day... 26 March
 On This Day... 26 May
 On This Day... 26 November
 On This Day... 26 October
 On This Day... 26 September
 On This Day... 27 April
 On This Day... 27 August
 On This Day... 27 December
 On This Day... 27 February
 On This Day... 27 January
 On This Day... 27 July
 On This Day... 27 June
 On This Day... 27 March
 On This Day... 27 May
 On This Day... 27 November
 On This Day... 27 October
 On This Day... 27 September
 On This Day... 28 April
 On This Day... 28 August
 On This Day... 28 December
 On This Day... 28 February
 On This Day... 28 January
 On This Day... 28 July
 On This Day... 28 June
 On This Day... 28 March
 On This Day... 28 May
 On This Day... 28 November
 On This Day... 28 October
 On This Day... 28 September
 On This Day... 29 April
 On This Day... 29 August
 On This Day... 29 December
 On This Day... 29 February
 On This Day... 29 January
 On This Day... 29 July
 On This Day... 29 June
 On This Day... 29 March
 On This Day... 29 May
 On This Day... 29 November
 On This Day... 29 October
 On This Day... 29 September
 On This Day... 30 April
 On This Day... 30 August
 On This Day... 30 December
 On This Day... 30 January
 On This Day... 30 July
 On This Day... 30 June
 On This Day... 30 March
 On This Day... 30 May
 On This Day... 30 November
 On This Day... 30 October
 On This Day... 30 September
 On This Day... 4 April
 On This Day... 4 August
 On This Day... 4 December
 On This Day... 4 February
 On This Day... 4 January
 On This Day... 4 July
 On This Day... 4 June
 On This Day... 4 March
 On This Day... 4 May
 On This Day... 4 November
 On This Day... 4 October
 On This Day... 4 September
 On This Day... 5 April
 On This Day... 5 August
 On This Day... 5 December
 On This Day... 5 February
 On This Day... 5 January
 On This Day... 5 July
 On This Day... 5 June
 On This Day... 5 March
 On This Day... 5 May
 On This Day... 5 November
 On This Day... 5 October
 On This Day... 5 September
 On This Day... 6 April
 On This Day... 6 August
 On This Day... 6 December
 On This Day... 6 February
 On This Day... 6 January
 On This Day... 6 July
 On This Day... 6 June
 On This Day... 6 March
 On This Day... 6 May
 On This Day... 6 November
 On This Day... 6 October
 On This Day... 6 September
 On This Day... 7 April
 On This Day... 7 August
 On This Day... 7 December
 On This Day... 7 February
 On This Day... 7 January
 On This Day... 7 July
 On This Day... 7 June
 On This Day... 7 March
 On This Day... 7 May
 On This Day... 7 November
 On This Day... 7 October
 On This Day... 7 September
 On This Day... 8 April
 On This Day... 8 August
 On This Day... 8 December
 On This Day... 8 February
 On This Day... 8 January
 On This Day... 8 July
 On This Day... 8 June
 On This Day... 8 March
 On This Day... 8 May
 On This Day... 8 November
 On This Day... 8 October
 On This Day... 8 September
 On This Day... 9 April
 On This Day... 9 August
 On This Day... 9 December
 On This Day... 9 February
 On This Day... 9 January
 On This Day... 9 July
 On This Day... 9 June
 On This Day... 9 March
 On This Day... 9 May
 On This Day... 9 November
 On This Day... 9 October
 On This Day... 9 September
 Production: Cerium
 Production: Erbium
 Production: Hafnium
 Production: Iodine
 Production: Lanthanum
 Production: Lead
 Production: Molybdenum
 Production: Neodymium
 Production: Niobium
 Production: Nitrogen
 Production: Rubidium
 Production: Scandium
 Production: Sodium
 Production: Strontium
 Production: Terbium
 Production: Thorium
 Production: Ytterbium
 Reactions: Iron
 Reactions: Thorium
 Spectrum: Thorium
 
th+ (1)
 Atomic data: Thorium
 
th+2 (1)
 Data2: Thorium
 
th+3 (1)
 Data2: Thorium
 
th+4 (1)
 Data2: Thorium
 
th3 (1)
 Compounds: Barium
 
th4+ (1)
 Reactions: Thorium
 
thailand (5)
 Country: Thailand
 Country: United Kingdom
 Data1: Tantalum
 Data1: Tin
 Production: Tantalum
 
thallium (20)
 Atomic data: Thallium
 Biography: Robert Wilhelm Bunsen
 Biography: Sir William Crookes
 Compounds: Thallium
 Data1: Bismuth
 Data1: Francium
 Data1: Indium
 Data1: Thallium
 Data2: Thallium
 Data2: Ununtrium
 Document: Abundance of the Elements in the Solar System
 Glossary: Half Life
 Isotope: Thallium
 MAC data: Thallium
 Names: Thallium
 On This Day... 8 July
 Production: Thallium
 Reactions: Thallium
 Reactions: Ununtrium
 Spectrum: Thallium
 
thallos (1)
 Data1: Thallium
 
themselves (5)
 Biography: Irene Joliot-Curie
 Biography: Joseph Louis Gay-Lussac
 Biography: Julius Caesar Scaliger
 Production: Holmium
 Production: Uranium
 
thenard (8)
 Biography: Antoine-Jerome Balard
 Biography: Joseph Louis Gay-Lussac
 Biography: Louis Jacques Thenard
 Data1: Boron
 Data1: Fluorine
 Data1: Silicon
 On This Day... 4 May
 Production: Fluorine
 
theodor (5)
 Biography: Hieronymous Theodor Richter
 Data1: Indium
 Data1: Thulium
 On This Day... 27 May
 On This Day... 6 July
 
theodore (4)
 Biography: Glenn Theodore Seaborg
 On This Day... 11 July
 On This Day... 19 April
 On This Day... 31 January
 
theologian (2)
 Biography: Joseph Priestley
 On This Day... 13 March
 
theological (2)
 Biography: Gottfried Münzenberg
 Biography: Joseph Priestley
 
theophrastus (1)
 Biography: Julius Caesar Scaliger
 
theorell (1)
 On This Day... 6 July
 
theoretical (14)
 Biography: Emilio Gino Segre
 Biography: Ida Eva Tacke Noddack
 Biography: Joseph Louis Gay-Lussac
 Biography: Lise Meitner
 Biography: Louis Jacques Thenard
 Biography: Robert Wilhelm Bunsen
 Biography: William Hyde Wollaston
 Data1: Bismuth
 Data2: Hydrogen
 Glossary: Double Electron Capture
 Glossary: Kelvin (absolute temperature)
 Glossary: Magic Number
 Isotope: Bismuth
 On This Day... 26 January
 
theoretically (9)
 Compounds: Sodium
 Data1: Bismuth
 Equation: Boyle's Law
 Equation: Charles' Law
 Glossary: Spontaneous Fission
 Isotope: Bismuth
 Isotope: Hassium
 Isotope: Tungsten
 Reactions: Helium
 
theories (4)
 Biography: Antoine-Laurent de Lavoisier
 Biography: Jöns Jacob Berzelius
 Biography: Joseph Louis Gay-Lussac
 Isotope: Hassium
 
theorique (1)
 Biography: Louis Jacques Thenard
 
theorist (1)
 Biography: Enrico Fermi
 
theorized (3)
 Country: Canada
 On This Day... 9 August
 Production: Nickel
 
theory (46)
 Biography: Antoine-Laurent de Lavoisier
 Biography: Arthur Jeffrey Dempster
 Biography: Enrico Fermi
 Biography: Ferdinand Frederic Henri Moissan
 Biography: Frederick Soddy
 Biography: John Dalton
 Biography: John William Strutt Rayleigh
 Biography: Joseph Louis Gay-Lussac
 Biography: Joseph Priestley
 Biography: Robert Wilhelm Bunsen
 Biography: Sir Humphry Davy
 Biography: Sir William Crookes
 Biography: William Hyde Wollaston
 Country: Outer space
 Data1: Hafnium
 Data1: Technetium
 Document: The Noble Gases (Group 18)
 Glossary: Electron Capture
 Glossary: Noble Gasses (inert gasses)
 On This Day... 1 May
 On This Day... 11 June
 On This Day... 12 July
 On This Day... 13 February
 On This Day... 13 June
 On This Day... 13 November
 On This Day... 15 December
 On This Day... 16 August
 On This Day... 18 January
 On This Day... 18 July
 On This Day... 20 February
 On This Day... 21 July
 On This Day... 22 April
 On This Day... 22 February
 On This Day... 23 April
 On This Day... 23 January
 On This Day... 23 June
 On This Day... 26 June
 On This Day... 26 March
 On This Day... 27 January
 On This Day... 30 August
 On This Day... 31 January
 On This Day... 4 February
 On This Day... 5 July
 On This Day... 7 August
 On This Day... 7 September
 On This Day... 8 November
 
therapeutically (1)
 Data1: Radon
 
therapy (6)
 Biography: Jöns Jacob Berzelius
 Compounds: Iron
 Data1: Cobalt
 Isotope: Actinium
 Isotope: Cobalt
 Isotope: Strontium
 
thereafter (4)
 Biography: Jöns Jacob Berzelius
 Compounds: Sodium
 Data1: Francium
 Data1: Terbium
 
thereby (4)
 Allotrope: Plutonium
 Data1: Praseodymium
 Glossary: Convection
 Production: Technetium
 
therefore (45)
 Allotrope: Phosphorus
 Biography: Ferdinand Frederic Henri Moissan
 Biography: Michael Faraday
 Biography: Robert Wilhelm Bunsen
 Compounds: Argon
 Compounds: Copper
 Compounds: Gadolinium
 Compounds: Indium
 Compounds: Iodine
 Compounds: Neon
 Compounds: Nitrogen
 Compounds: Selenium
 Country: Canada
 Data1: Aluminium
 Data1: Bismuth
 Data1: Boron
 Data1: Cerium
 Data1: Chlorine
 Data1: Cobalt
 Data1: Lutetium
 Data1: Nitrogen
 Data1: Oxygen
 Data1: Potassium
 Data1: Samarium
 Data1: Strontium
 Data1: Sulfur
 Data1: Technetium
 Data1: Thallium
 Document: The Noble Gases (Group 18)
 Equation: Boyle's Law
 Glossary: Absorption Spectrum
 Glossary: Atomic Charge
 Glossary: Halogens
 Glossary: Neutrino
 Glossary: Noble Gasses (inert gasses)
 Glossary: Periods
 Glossary: Plasma
 Glossary: Thermal Conductivity
 Glossary: Transactinides
 Glossary: X-Rays
 Isotope: Magnesium
 Production: Aluminium
 Production: Germanium
 Production: Radium
 Production: Uranium
 
therefrom (1)
 Data1: Neodymium
 
therein (2)
 Production: Praseodymium
 Production: Terbium
 
thermal (153)
 Biography: Gustav Robert Kirchhoff
 Biography: John Dalton
 Biography: Joseph Louis Gay-Lussac
 Biography: Philip Hauge Abelson
 Compounds: Beryllium
 Compounds: Cadmium
 Compounds: Chromium
 Compounds: Gadolinium
 Compounds: Hafnium
 Compounds: Indium
 Compounds: Lead
 Compounds: Selenium
 Compounds: Silicon
 Compounds: Zinc
 Data1: Curium
 Data1: Helium
 Data1: Sodium
 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
 Glossary: Alloy
 Glossary: Conduction
 Glossary: Enthalpy Change of Fusion (Heat of Fusion)
 Glossary: Enthalpy Change of Vapourisation
 Glossary: Kelvin (absolute temperature)
 Glossary: Non-Metals
 Glossary: Refractory
 Glossary: Temperature
 Glossary: Thermal Conductivity
 Glossary: Thermal Expansion
 Isotope: Plutonium
 Isotope: Uranium
 Isotope: Xenon
 Production: Caesium
 Production: Plutonium
 Production: Potassium
 Production: Sodium
 Production: Uranium
 
thermally (1)
 Glossary: Thermal Conductivity
 
thermate (1)
 Compounds: Barium
 
thermionic (1)
 Data1: Lanthanum
 
thermistors (1)
 Compounds: Barium
 
thermite (3)
 Compounds: Barium
 Data1: Boron
 On This Day... 18 January
 
thermochemistry (1)
 On This Day... 27 October
 
thermocouplers (1)
 Data1: Rhenium
 
thermocouples (1)
 Data1: Rhodium
 
thermodynamic (3)
 Glossary: Temperature
 On This Day... 11 June
 Reactions: Iron
 
thermodynamically (2)
 Allotrope: Boron
 Allotrope: Selenium
 
thermodynamics (14)
 Biography: Joseph Louis Gay-Lussac
 Glossary: Temperature
 On This Day... 11 February
 On This Day... 11 June
 On This Day... 13 June
 On This Day... 18 July
 On This Day... 2 January
 On This Day... 22 April
 On This Day... 23 April
 On This Day... 26 June
 On This Day... 26 March
 On This Day... 27 November
 On This Day... 31 January
 On This Day... 5 July
 
thermoelectric (6)
 Compounds: Bismuth
 Compounds: Tellurium
 Data1: Actinium
 Data1: Tellurium
 Isotope: Polonium
 Isotope: Strontium
 
thermoluminescence (1)
 Compounds: Fluorine
 
thermoluminescent (1)
 Compounds: Lithium
 
thermometer (3)
 Biography: (Gabriel) Daniel Fahrenheit
 On This Day... 24 May
 On This Day... 7 March
 
thermometers (4)
 Data1: Gallium
 Data1: Mercury
 Data1: Thallium
 Glossary: Fahrenheit
 
thermonuclear (2)
 Compounds: Lithium
 Data1: Fermium
 
thermosetting (1)
 On This Day... 7 December
 
thesis (2)
 Biography: Hans Christian Oersted
 Biography: Irene Joliot-Curie
 
thessaly (1)
 Data1: Magnesium
 
thick (4)
 Allotrope: Arsenic
 Country: Outer space
 Glossary: Viscosity
 Production: Nitrogen
 
thickener (2)
 Compounds: Potassium
 Compounds: Titanium
 
thickening (1)
 Compounds: Sodium
 
thicker (1)
 Glossary: Poisson Ratio
 
thickness (5)
 Biography: Pierre Jules César Janssen
 Data1: Americium
 Data1: Promethium
 Data1: Ruthenium
 Glossary: Viscosity
 
thin (26)
 Compounds: Tantalum
 Compounds: Titanium
 Country: Outer space
 Data1: Indium
 Data1: Lawrencium
 Data1: Molybdenum
 Data1: Tin
 Data1: Tungsten
 Glossary: Alpha Decay
 Glossary: Beta Particle
 Glossary: Pyrophoric
 Glossary: Viscosity
 Glossary: Young's Modulus
 Reactions: Aluminium
 Reactions: Barium
 Reactions: Beryllium
 Reactions: Calcium
 Reactions: Germanium
 Reactions: Lead
 Reactions: Magnesium
 Reactions: Niobium
 Reactions: Radium
 Reactions: Silicon
 Reactions: Strontium
 Reactions: Tantalum
 Reactions: Titanium
 
things (15)
 Biography: Friedrich Wöhler
 Biography: Louis Jacques Thenard
 Biography: Robert Wilhelm Bunsen
 Compounds: Carbon
 Data1: Lead
 Data1: Magnesium
 Data1: Platinum
 Data1: Titanium
 Data1: Vanadium
 Document: The Halogens (Group 17)
 Glossary: Enzyme
 Glossary: IUPAC
 Glossary: Liquid
 On This Day... 2 May
 Production: Titanium
 
think (2)
 Data1: Neon
 Data1: Plutonium
 
thinking (1)
 Biography: Pierre Curie
 
thinner (4)
 Data1: Molybdenum
 Data1: Niobium
 Glossary: Air
 Glossary: Poisson Ratio
 
thioamides (1)
 On This Day... 2 November
 
thiopental (1)
 Compounds: Sodium
 
thiosulfate (3)
 Compounds: Sodium
 Data1: Sulfur
 Reactions: Sulfur
 
third (98)
 Biography: Joseph Louis Gay-Lussac
 Biography: Pierre Curie
 Compounds: Silver
 Country: Australia
 Country: Bolivia
 Country: Canada
 Country: China
 Country: Japan
 Country: Kazakhstan
 Country: Outer space
 Country: Peru
 Country: South Africa
 Country: Sweden
 Country: United States of America
 Data1: Cobalt
 Data1: Curium
 Data1: Nickel
 Data1: Oxygen
 Data2: Aluminium
 Data2: Antimony
 Data2: Argon
 Data2: Arsenic
 Data2: Beryllium
 Data2: Bismuth
 Data2: Boron
 Data2: Bromine
 Data2: Cadmium
 Data2: Calcium
 Data2: Carbon
 Data2: Cerium
 Data2: Chlorine
 Data2: Chromium
 Data2: Cobalt
 Data2: Copper
 Data2: Dysprosium
 Data2: Erbium
 Data2: Europium
 Data2: Fluorine
 Data2: Gadolinium
 Data2: Gallium
 Data2: Germanium
 Data2: Hafnium
 Data2: Holmium
 Data2: Indium
 Data2: Iodine
 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: Nickel
 Data2: Niobium
 Data2: Nitrogen
 Data2: Oxygen
 Data2: Palladium
 Data2: Phosphorus
 Data2: Potassium
 Data2: Praseodymium
 Data2: Promethium
 Data2: Rhodium
 Data2: Rubidium
 Data2: Ruthenium
 Data2: Samarium
 Data2: Scandium
 Data2: Selenium
 Data2: Silicon
 Data2: Silver
 Data2: Sodium
 Data2: Strontium
 Data2: Sulfur
 Data2: Technetium
 Data2: Tellurium
 Data2: Terbium
 Data2: Thallium
 Data2: Thorium
 Data2: Thulium
 Data2: Tin
 Data2: Titanium
 Data2: Vanadium
 Data2: Xenon
 Data2: Ytterbium
 Data2: Yttrium
 Data2: Zinc
 Data2: Zirconium
 Glossary: Double Beta Decay
 Glossary: Double Electron Capture
 Glossary: Doubly Magic
 Glossary: Periods
 Glossary: Transactinides
 Production: Copper
 Production: Lead
 
thirds (11)
 Country: United States of America
 Data1: Yttrium
 Production: Erbium
 Production: Gold
 Production: Holmium
 Production: Iodine
 Production: Mercury
 Production: Strontium
 Production: Terbium
 Production: Thulium
 Production: Yttrium
 
thirteen (1)
 Biography: Julius Caesar Scaliger
 
thirty (5)
 Biography: Julius Caesar Scaliger
 Biography: Lise Meitner
 Data1: Copper
 Glossary: Inner Transition Metals
 Production: Lithium
 
tho2 (3)
 Compounds: Thorium
 Data1: Technetium
 Data1: Thorium
 
thomas (14)
 Biography: Sir Humphry Davy
 Biography: William Hyde Wollaston
 Data1: Gold
 Data1: Helium
 Data1: Lithium
 Data1: Sodium
 Data1: Strontium
 On This Day... 11 February
 On This Day... 15 February
 On This Day... 18 March
 On This Day... 19 December
 On This Day... 21 December
 On This Day... 22 October
 On This Day... 9 April
 
thompson (8)
 Data1: Berkelium
 Data1: Californium
 Data1: Fermium
 Data1: Mendelevium
 On This Day... 20 January
 On This Day... 26 June
 On This Day... 26 March
 On This Day... 9 March
 
thomsen (1)
 On This Day... 16 February
 
thomson (4)
 Data1: Sodium
 Glossary: Electron
 On This Day... 18 December
 On This Day... 30 April
 
thor (1)
 Data1: Thorium
 
thoria (1)
 Data1: Thorium
 
thorianite (1)
 Data1: Technetium
 
thorite (1)
 Data1: Thorium
 
thorium (39)
 Atomic data: Thorium
 Compounds: Thorium
 Country: Australia
 Country: Brazil
 Country: Canada
 Country: India
 Country: Malaysia
 Country: Norway
 Country: South Africa
 Country: United States of America
 Data1: Francium
 Data1: Indium
 Data1: Polonium
 Data1: Promethium
 Data1: Protactinium
 Data1: Thorium
 Data2: Thorium
 Document: Abundance of the Elements in the Solar System
 Document: The Actinoid Series
 Glossary:
 Glossary: Actinides
 Glossary: Actinoids
 Glossary: Alpha Decay
 Glossary: Spontaneous Fission
 Isotope: Radium
 Isotope: Thorium
 MAC data: Thorium
 Names: Thorium
 On This Day... 19 October
 On This Day... 31 January
 Production: Bismuth
 Production: Cerium
 Production: Francium
 Production: Helium
 Production: Scandium
 Production: Thorium
 Production: Uranium
 Reactions: Thorium
 Spectrum: Thorium
 
thoroughly (3)
 Biography: Julius Caesar Scaliger
 Compounds: Strontium
 Data1: Neodymium
 
thortveitile (1)
 Data1: Scandium
 
thortveitite (6)
 Country: Madagascar
 Country: Norway
 Data1: Hafnium
 Data1: Scandium
 Production: Hafnium
 Production: Scandium
 
thou (1)
 Biography: Julius Caesar Scaliger
 
thought (42)
 Allotrope: Carbon
 Biography: Julius Caesar Scaliger
 Biography: Walter Noddack
 Compounds: Carbon
 Country: China
 Country: Mexico
 Country: South Africa
 Data1: Astatine
 Data1: Bismuth
 Data1: Cerium
 Data1: Chlorine
 Data1: Francium
 Data1: Lead
 Data1: Lutetium
 Data1: Manganese
 Data1: Mercury
 Data1: Molybdenum
 Data1: Oxygen
 Data1: Platinum
 Data1: Plutonium
 Data1: Radon
 Data1: Ruthenium
 Data1: Rutherfordium
 Data1: Samarium
 Data1: Technetium
 Data1: Terbium
 Data1: Uranium
 Data1: Vanadium
 Data1: Ytterbium
 Document: The Lanthanoid Series
 Glossary: Alpha Decay
 Glossary: Base
 Glossary: Electron Capture
 Glossary: Island of Stability
 Glossary: Molecule
 Glossary: Viscosity
 Isotope: Helium
 Isotope: Hydrogen
 Production: Iron
 Production: Scandium
 Production: Uranium
 Reactions: Radium
 
thousand (70)
 Country: Algeria
 Country: Australia
 Country: Belgium
 Country: Bolivia
 Country: Brazil
 Country: Bulgaria
 Country: Burma (Myanmar)
 Country: Burundi
 Country: Canada
 Country: China
 Country: Cuba
 Country: Democratic Republic of Congo
 Country: Egypt
 Country: Finland
 Country: France
 Country: India
 Country: Indonesia
 Country: Ireland
 Country: Israel
 Country: Italy
 Country: Japan
 Country: Jordan
 Country: Kazakhstan
 Country: Kuwait
 Country: Laos
 Country: Libya
 Country: Malaysia
 Country: Mexico
 Country: Mongolia
 Country: Netherlands
 Country: Nigeria
 Country: Norway
 Country: Peru
 Country: Portugal
 Country: Russia
 Country: Rwanda
 Country: South Africa
 Country: Spain
 Country: Switzerland
 Country: Thailand
 Country: Turkey
 Country: Ukraine
 Country: United States of America
 Country: Uzbekistan
 Country: Venezuela
 Country: Vietnam
 Country: Zimbabwe
 Data1: Antimony
 Data1: Beryllium
 Data1: Bromine
 Data1: Cadmium
 Data1: Cerium
 Data1: Cobalt
 Data1: Iodine
 Data1: Lithium
 Data1: Magnesium
 Data1: Molybdenum
 Data1: Nickel
 Data1: Niobium
 Data1: Silver
 Data1: Sodium
 Data1: Strontium
 Data1: Thorium
 Data1: Tin
 Data1: Titanium
 Data1: Tungsten
 Data1: Uranium
 Data1: Vanadium
 Glossary: Electron Volt
 Production: Tellurium
 
thousands (6)
 Data1: Boron
 Data1: Caesium
 Data1: Silver
 Data1: Zinc
 Glossary: Molecule
 Production: Uranium
 
thousandth (1)
 Data1: Darmstadtium
 
thread (1)
 Glossary: Ductile
 
threat (2)
 Data1: Erbium
 Data1: Radon
 
threatened (1)
 Biography: Dmitriy Ivanovich Mendeleyev
 
three (68)
 Allotrope: Carbon
 Allotrope: Ytterbium
 Biography: Carl Gustav Mosander
 Biography: Clemens Alexander Winkler
 Biography: Lise Meitner
 Biography: Louis Jacques Thenard
 Biography: Robert Wilhelm Bunsen
 Biography: Sir Humphry Davy
 Compounds: Iodine
 Compounds: Nitrogen
 Compounds: Sodium
 Compounds: Titanium
 Country: Canada
 Country: China
 Country: Colombia
 Country: Peru
 Country: Russia
 Country: South Africa
 Country: Ukraine
 Country: United States of America
 Data1: Americium
 Data1: Carbon
 Data1: Erbium
 Data1: Helium
 Data1: Indium
 Data1: Lawrencium
 Data1: Lithium
 Data1: Manganese
 Data1: Neon
 Data1: Nickel
 Data1: Osmium
 Data1: Phosphorus
 Data1: Polonium
 Data1: Roentgenium
 Data1: Ruthenium
 Data1: Rutherfordium
 Data1: Scandium
 Data1: Technetium
 Data1: Terbium
 Data1: Thorium
 Data1: Tungsten
 Data1: Ununoctium
 Data1: Ununtrium
 Data1: Yttrium
 Glossary: Air
 Glossary: Allotrope
 Glossary: Alloy
 Glossary: Amorphous
 Glossary: Anti-Neutrino
 Glossary: Aqua regia
 Glossary: Double Electron Capture
 Glossary: Group
 Glossary: Halogens
 Glossary: Neutrino
 Isotope: Hydrogen
 Isotope: Roentgenium
 Isotope: Technetium
 Isotope: Uranium
 On This Day... 2 December
 On This Day... 8 December
 Production: Arsenic
 Production: Helium
 Production: Indium
 Production: Lawrencium
 Production: Mercury
 Production: Plutonium
 Production: Strontium
 Production: Thorium
 
thriving (2)
 Country: United Kingdom
 Data1: Tin
 
throat (3)
 Compounds: Carbon
 Data1: Chlorine
 Data1: Zinc
 
thrombocytopenia (1)
 Compounds: Samarium
 
throughout (12)
 Allotrope: Oxygen
 Biography: Michael Faraday
 Biography: Robert Wilhelm Bunsen
 Compounds: Samarium
 Country: Outer space
 Data1: Gallium
 Data1: Gold
 Data1: Tin
 Equation: Boyle's Law
 Production: Sulfur
 Production: Uranium
 Production: Zinc
 
throws (1)
 Biography: Robert Wilhelm Bunsen
 
thule (1)
 Data1: Thulium
 
thulia (2)
 Data1: Holmium
 Data1: Thulium
 
thulium (17)
 Atomic data: Thulium
 Biography: Per Teodor Cleve
 Compounds: Thulium
 Country: China
 Data1: Holmium
 Data1: Thulium
 Data2: Thulium
 Document: Abundance of the Elements in the Solar System
 Document: The Lanthanoid Series
 Glossary: Rare Earth Elements
 Isotope: Thulium
 MAC data: Thulium
 Names: Thulium
 Production: Thulium
 Reactions: Mendelevium
 Reactions: Thulium
 Spectrum: Thulium
 
thunder (1)
 Data1: Thorium
 
thundering (1)
 Biography: Robert Wilhelm Bunsen
 
thyristors (1)
 Compounds: Silicon
 
thyroid (7)
 Compounds: Iodine
 Compounds: Technetium
 Data1: Astatine
 Data1: Iodine
 Data1: Technetium
 Document: The Halogens (Group 17)
 Isotope: Iodine
 
thyrotoxicosis (1)
 Compounds: Iodine
 
thyroxine (3)
 Compounds: Iodine
 Data1: Iodine
 Document: The Halogens (Group 17)
 
ti (19)
 Atomic data: Titanium
 Data1: Dysprosium
 Data1: Erbium
 Data1: Niobium
 Data1: Samarium
 Data1: Scandium
 Data1: Terbium
 Data1: Thulium
 Data1: Titanium
 Data2: Titanium
 Isotope: Calcium
 Isotope: Chromium
 Isotope: Scandium
 Isotope: Titanium
 Isotope: Vanadium
 Production: Niobium
 Production: Terbium
 Reactions: Titanium
 Spectrum: Titanium
 
ti+ (1)
 Atomic data: Titanium
 
ti+2 (1)
 Data2: Titanium
 
ti+3 (1)
 Data2: Titanium
 
ti+4 (1)
 Data2: Titanium
 
ti0 (1)
 Data2: Titanium
 
ti2+ (1)
 Reactions: Titanium
 
ti3+ (1)
 Reactions: Titanium
 
tib2 (1)
 Compounds: Titanium
 
tibet (3)
 Country: China
 Data1: Boron
 Data1: Mercury
 
tibr4 (1)
 Reactions: Titanium
 
tic (1)
 Compounds: Titanium
 
tickets (1)
 Biography: Michael Faraday
 
ticl4 (2)
 Data1: Titanium
 Reactions: Titanium
 
tied (1)
 Production: Thulium
 
tif4 (1)
 Reactions: Titanium
 
tif6 (1)
 Reactions: Titanium
 
tif62 (1)
 Reactions: Titanium
 
tiffeneau (1)
 On This Day... 27 March
 
tightly (2)
 Compounds: Barium
 Glossary: Isometric Transition
 
tii4 (1)
 Reactions: Titanium
 
tiiii (1)
 Reactions: Titanium
 
tiiv (1)
 Reactions: Titanium
 
tiles (1)
 Compounds: Silicon
 
till (2)
 Biography: Frederick Soddy
 Biography: Jöns Jacob Berzelius
 
timbers (1)
 Isotope: Strontium
 
time (79)
 Allotrope: Carbon
 Biography: Antoine-Laurent de Lavoisier
 Biography: Carl Gustav Mosander
 Biography: Charles Hatchett
 Biography: Dmitriy Ivanovich Mendeleyev
 Biography: Glenn Theodore Seaborg
 Biography: Hans Christian Oersted
 Biography: Ida Eva Tacke Noddack
 Biography: Jacob A. Marinsky
 Biography: John Dalton
 Biography: Jöns Jacob Berzelius
 Biography: Joseph Louis Gay-Lussac
 Biography: Julius Caesar Scaliger
 Biography: Lise Meitner
 Biography: Michael Faraday
 Biography: Philip Hauge Abelson
 Biography: Pierre Curie
 Biography: Pierre Jules César Janssen
 Biography: Robert Wilhelm Bunsen
 Biography: Sir Humphry Davy
 Biography: Sir William Crookes
 Biography: Smithson Tennant
 Compounds: Argon
 Compounds: Copper
 Compounds: Krypton
 Compounds: Neon
 Compounds: Silicon
 Compounds: Xenon
 Country: India
 Country: Outer space
 Country: United States of America
 Data1: Aluminium
 Data1: Astatine
 Data1: Bohrium
 Data1: Curium
 Data1: Erbium
 Data1: Europium
 Data1: Francium
 Data1: Gold
 Data1: Iodine
 Data1: Lanthanum
 Data1: Lawrencium
 Data1: Manganese
 Data1: Mendelevium
 Data1: Neodymium
 Data1: Oxygen
 Data1: Palladium
 Data1: Phosphorus
 Data1: Platinum
 Data1: Plutonium
 Data1: Polonium
 Data1: Promethium
 Data1: Protactinium
 Data1: Rubidium
 Data1: Scandium
 Data1: Technetium
 Data1: Titanium
 Data1: Ununoctium
 Data1: Ytterbium
 Equation: Electric current
 Glossary: Abundance
 Glossary: Double Beta Decay
 Glossary: Half Life
 Glossary: Wavefunction
 Isotope: Aluminium
 Isotope: Cobalt
 Isotope: Hydrogen
 Isotope: Osmium
 On This Day... 12 January
 On This Day... 13 October
 On This Day... 14 August
 On This Day... 19 August
 Production: Astatine
 Production: Curium
 Production: Francium
 Production: Mendelevium
 Production: Plutonium
 Production: Technetium
 Production: Zinc
 
times (54)
 Allotrope: Carbon
 Biography: Arthur Jeffrey Dempster
 Biography: Henry Cavendish
 Biography: Robert Wilhelm Bunsen
 Biography: Sir Humphry Davy
 Compounds: Potassium
 Compounds: Silver
 Compounds: Sodium
 Compounds: Strontium
 Country: Outer space
 Country: United Kingdom
 Country: United States of America
 Data1: Actinium
 Data1: Americium
 Data1: Arsenic
 Data1: Bismuth
 Data1: Chlorine
 Data1: Copper
 Data1: Gallium
 Data1: Gold
 Data1: Helium
 Data1: Indium
 Data1: Lanthanum
 Data1: Lutetium
 Data1: Manganese
 Data1: Neon
 Data1: Nickel
 Data1: Palladium
 Data1: Phosphorus
 Data1: Polonium
 Data1: Radium
 Data1: Sodium
 Data1: Thorium
 Data1: Tin
 Data1: Xenon
 Data1: Zinc
 Equation: Graham's Law
 Glossary: Allotrope
 Glossary: Enthalpy Change of Vapourisation
 Glossary: Moh's Scale of Hardness
 Glossary: pH
 Glossary: Proton
 Isotope: Bismuth
 Isotope: Radium
 Isotope: Strontium
 Production: Indium
 Production: Lead
 Production: Lutetium
 Production: Mercury
 Production: Neon
 Production: Rhodium
 Production: Tellurium
 Production: Thorium
 Production: Uranium
 
tin (53)
 Allotrope: Tin
 Atomic data: Tin
 Compounds: Indium
 Compounds: Niobium
 Compounds: Tin
 Compounds: Titanium
 Country: Australia
 Country: Belgium
 Country: Bolivia
 Country: Brazil
 Country: Burma (Myanmar)
 Country: Burundi
 Country: China
 Country: Democratic Republic of Congo
 Country: Indonesia
 Country: Laos
 Country: Malaysia
 Country: Nigeria
 Country: Peru
 Country: Portugal
 Country: Russia
 Country: Rwanda
 Country: Thailand
 Country: United Kingdom
 Country: Vietnam
 Data1: Bismuth
 Data1: Copper
 Data1: Gallium
 Data1: Indium
 Data1: Lead
 Data1: Scandium
 Data1: Technetium
 Data1: Tellurium
 Data1: Tin
 Data1: Tungsten
 Data1: Zinc
 Data2: Tin
 Document: Abundance of the Elements in the Solar System
 Document: Chemical makeup of the human body
 Glossary: Doubly Magic
 Glossary: Metalloids
 Isotope: Tin
 MAC data: Tin
 Names: Tin
 Production: Tantalum
 Production: Tellurium
 Production: Tin
 Production: Uranium
 Production: Zirconium
 Reactions: Tin
 Reactions: Titanium
 Reactions: Ununquadium
 Spectrum: Tin
 
tincal (2)
 Country: United States of America
 Production: Boron
 
tinge (9)
 Data1: Cobalt
 Data1: Iron
 Data1: Manganese
 Data1: Neodymium
 Data1: Nickel
 Data1: Praseodymium
 Data1: Silicon
 Data1: Thallium
 Glossary: Alkali Metal
 
tinged (1)
 Data1: Terbium
 
tingling (1)
 Biography: Robert Wilhelm Bunsen
 
tinn (1)
 Names: Tin
 
tinned (2)
 Compounds: Sodium
 Data1: Tin
 
tinplate (1)
 Data1: Tin
 
tint (1)
 Data1: Nickel
 
tiny (10)
 Biography: Ferdinand Frederic Henri Moissan
 Compounds: Potassium
 Data1: Indium
 Data1: Lutetium
 Data1: Plutonium
 Isotope: Americium
 Isotope: Plutonium
 Isotope: Ytterbium
 Production: Plutonium
 Production: Technetium
 
tio2 (14)
 Compounds: Titanium
 Country: Australia
 Country: Brazil
 Country: India
 Country: Malaysia
 Country: Outer space
 Country: Sierra Leone
 Country: South Africa
 Country: Sri Lanka
 Country: Ukraine
 Country: Vietnam
 Data1: Titanium
 Production: Titanium
 Reactions: Titanium
 
tio2+ (1)
 Reactions: Titanium
 
tio22+ (1)
 Reactions: Titanium
 
tip (2)
 Data1: Iridium
 Data1: Osmium
 
tipped (1)
 Data1: Copper
 
tire (1)
 Data1: Carbon
 
tires (2)
 Data1: Argon
 On This Day... 5 February
 
tissue (7)
 Biography: Julius Caesar Scaliger
 Data1: Berkelium
 Data1: Curium
 Data1: Lithium
 Data1: Osmium
 Glossary: Base
 Glossary: Radiation
 
tissues (10)
 Compounds: Chlorine
 Compounds: Sodium
 Compounds: Technetium
 Data1: Polonium
 Data1: Sulfur
 Data1: Zirconium
 Glossary: Beta Particle
 Glossary: Gamma Ray
 Isotope: Ytterbium
 Production: Nitrogen
 
titaan (1)
 Names: Titanium
 
titan (4)
 Country: Outer space
 Data1: Argon
 Names: Titanium
 Production: Nitrogen
 
titanate (2)
 Compounds: Barium
 Data1: Strontium
 
titane (1)
 Names: Titanium
 
titaniferous (1)
 Data1: Titanium
 
titanij (1)
 Names: Titanium
 
titanio (1)
 Names: Titanium
 
titanite (3)
 Country: Australia
 Data1: Titanium
 Production: Titanium
 
titanium (43)
 Atomic data: Titanium
 Biography: Jöns Jacob Berzelius
 Biography: Martin Heinrich Klaproth
 Biography: William Gregor
 Compounds: Antimony
 Compounds: Silicon
 Compounds: Titanium
 Compounds: Zirconium
 Country: Australia
 Country: Brazil
 Country: Canada
 Country: China
 Country: Egypt
 Country: India
 Country: Malaysia
 Country: Norway
 Country: Outer space
 Country: Republic of Korea
 Country: Sierra Leone
 Country: South Africa
 Country: Sri Lanka
 Country: Ukraine
 Country: United States of America
 Country: Vietnam
 Data1: Boron
 Data1: Bromine
 Data1: Hafnium
 Data1: Helium
 Data1: Ruthenium
 Data1: Titanium
 Data1: Zirconium
 Data2: Bromine
 Data2: Titanium
 Document: Abundance of the Elements in the Solar System
 Document: Chemical makeup of the human body
 Isotope: Titanium
 MAC data: Titanium
 Names: Titanium
 On This Day... 25 December
 Production: Titanium
 Production: Zirconium
 Reactions: Titanium
 Spectrum: Titanium
 
titanos (1)
 Data1: Titanium
 
titans (1)
 Data1: Titanium
 
title (2)
 Biography: John William Strutt Rayleigh
 Biography: Louis Jacques Thenard
 
titrant (1)
 Compounds: Uranium
 
titrations (2)
 On This Day... 11 February
 On This Day... 27 January
 
tivoli (1)
 Biography: Emilio Gino Segre
 
tl (9)
 Atomic data: Thallium
 Data1: Thallium
 Data2: Thallium
 Isotope: Bismuth
 Isotope: Lead
 Isotope: Mercury
 Isotope: Thallium
 Reactions: Thallium
 Spectrum: Thallium
 
tl+ (2)
 Atomic data: Thallium
 Reactions: Thallium
 
tl+1 (1)
 Data2: Thallium
 
tl+3 (1)
 Data2: Thallium
 
tl2o (2)
 Compounds: Thallium
 Reactions: Thallium
 
tl2o3 (1)
 Reactions: Thallium
 
tl3+ (1)
 Reactions: Thallium
 
tlass2 (2)
 Data1: Thallium
 Production: Thallium
 
tlbr (1)
 Reactions: Thallium
 
tlbr3 (1)
 Reactions: Thallium
 
tlcl (1)
 Reactions: Thallium
 
tlcl3 (1)
 Reactions: Thallium
 
tlcu7se4 (2)
 Data1: Thallium
 Production: Thallium
 
tlf3 (1)
 Reactions: Thallium
 
tli (1)
 Reactions: Thallium
 
tloh (1)
 Reactions: Thallium
 
tlpbas5s9 (2)
 Data1: Thallium
 Production: Thallium
 
tm (7)
 Atomic data: Thulium
 Data1: Thulium
 Isotope: Erbium
 Isotope: Thulium
 Isotope: Ytterbium
 Reactions: Thulium
 Spectrum: Thulium
 
tm+ (1)
 Atomic data: Thulium
 
tm+2 (1)
 Data2: Thulium
 
tm+3 (1)
 Data2: Thulium
 
tm2o3 (1)
 Reactions: Thulium
 
tm3+ (1)
 Reactions: Thulium
 
tmbr3 (1)
 Reactions: Thulium
 
tmcl3 (1)
 Reactions: Thulium
 
tmf3 (1)
 Reactions: Thulium
 
tmi3 (1)
 Reactions: Thulium
 
tnew (1)
 Country: New Zealand
 
tnt (5)
 Compounds: Barium
 Compounds: Nitrogen
 Data1: Nitrogen
 Data1: Plutonium
 Isotope: Plutonium
 
tobacco (3)
 Data1: Plutonium
 Data1: Polonium
 Production: Polonium
 
tobago (1)
 Country: Trinidad and Tobago
 
tobern (1)
 On This Day... 13 April
 
tobolsk (1)
 Biography: Dmitriy Ivanovich Mendeleyev
 
today (22)
 Biography: Ida Eva Tacke Noddack
 Compounds: Carbon
 Compounds: Chromium
 Country: United Kingdom
 Data1: Chromium
 Data1: Fluorine
 Data1: Hafnium
 Data1: Neodymium
 Data1: Palladium
 Data1: Phosphorus
 Data1: Praseodymium
 Data1: Promethium
 Data1: Silver
 Isotope: Hydrogen
 On This Day... 14 March
 On This Day... 23 October
 Production: Fluorine
 Production: Gadolinium
 Production: Gold
 Production: Lead
 Production: Magnesium
 Production: Thulium
 
tofu (1)
 Compounds: Magnesium
 
together (59)
 Allotrope: Carbon
 Biography: Friedrich Ernst Dorn
 Biography: Gottfried Münzenberg
 Biography: Irene Joliot-Curie
 Biography: Louis Jacques Thenard
 Biography: Michael Faraday
 Biography: Otto Hahn
 Biography: Sir Humphry Davy
 Compounds: Hafnium
 Compounds: Iodine
 Compounds: Nitrogen
 Compounds: Oxygen
 Compounds: Phosphorus
 Country: Outer space
 Data1: Nitrogen
 Data1: Polonium
 Data1: Ununoctium
 Data1: Zinc
 Equation: Avogadro's law
 Glossary: Rare Earth Elements
 Production: Lead
 Production: Palladium
 Production: Ununoctium
 Reactions: Beryllium
 Reactions: Caesium
 Reactions: Calcium
 Reactions: Carbon
 Reactions: Cerium
 Reactions: Chromium
 Reactions: Copper
 Reactions: Dysprosium
 Reactions: Erbium
 Reactions: Europium
 Reactions: Gadolinium
 Reactions: Helium
 Reactions: Holmium
 Reactions: Iron
 Reactions: Lanthanum
 Reactions: Lead
 Reactions: Lithium
 Reactions: Lutetium
 Reactions: Manganese
 Reactions: Mercury
 Reactions: Neodymium
 Reactions: Nickel
 Reactions: Potassium
 Reactions: Praseodymium
 Reactions: Promethium
 Reactions: Rubidium
 Reactions: Samarium
 Reactions: Scandium
 Reactions: Sodium
 Reactions: Strontium
 Reactions: Terbium
 Reactions: Thulium
 Reactions: Titanium
 Reactions: Ytterbium
 Reactions: Yttrium
 Reactions: Zinc
 
tolerate (1)
 Data1: Zirconium
 
toluene (2)
 On This Day... 11 March
 On This Day... 22 March
 
tomatoes (1)
 Compounds: Magnesium
 
tomb (1)
 Data1: Mercury
 
tombs (1)
 Data1: Mercury
 
tomography (2)
 Glossary: Positron Emission (Beta+ Decay)
 Isotope: Fluorine
 
tompson (3)
 Data1: Berkelium
 Data1: Californium
 Data1: Mendelevium
 
ton (7)
 Data1: Actinium
 Data1: Ruthenium
 Production: Polonium
 Production: Radium
 Production: Rhodium
 Production: Ruthenium
 Production: Zinc
 
tonal (1)
 Data1: Germanium
 
tone (1)
 Data1: Germanium
 
tongue (1)
 Biography: Robert Wilhelm Bunsen
 
tonnage (1)
 Data1: Iron
 
tonnes (153)
 Biography: Henry Cavendish
 Compounds: Radium
 Compounds: Sulfur
 Country: Afghanistan
 Country: Albania
 Country: Algeria
 Country: Argentina
 Country: Armenia
 Country: Australia
 Country: Austria
 Country: Azerbaijan
 Country: Belgium
 Country: Bhutan
 Country: Bolivia
 Country: Bosnia and Herzegovina
 Country: Botswana
 Country: Brazil
 Country: Bulgaria
 Country: Burkina Faso
 Country: Burma (Myanmar)
 Country: Burundi
 Country: Cameroon
 Country: Canada
 Country: Chile
 Country: China
 Country: Colombia
 Country: Costa Rica
 Country: Croatia
 Country: Cuba
 Country: Cyprus
 Country: Czech Republic
 Country: Democratic People's Republic of Korea
 Country: Democratic Republic of Congo
 Country: Dominican Republic
 Country: Ecuador
 Country: Egypt
 Country: El Salvador
 Country: Eritrea
 Country: Estonia
 Country: Ethiopia
 Country: Fiji
 Country: Finland
 Country: France
 Country: French Guiana
 Country: Gabon
 Country: Gambia
 Country: Georgia
 Country: Germany
 Country: Ghana
 Country: Greece
 Country: Greenland
 Country: Guatemala
 Country: Guinea
 Country: Guyana
 Country: Honduras
 Country: Hungary
 Country: India
 Country: Indonesia
 Country: Iran
 Country: Ireland
 Country: Israel
 Country: Italy
 Country: Ivory Coast
 Country: Jamaica
 Country: Japan
 Country: Jordan
 Country: Kazakhstan
 Country: Kenya
 Country: Kuwait
 Country: Kyrgyzstan
 Country: Laos
 Country: Latvia
 Country: Libya
 Country: Macedonia
 Country: Madagascar
 Country: Malaysia
 Country: Mali
 Country: Mauritania
 Country: Mexico
 Country: Moldova
 Country: Mongolia
 Country: Morocco
 Country: Mozambique
 Country: Namibia
 Country: Netherlands
 Country: New Caledonia
 Country: New Zealand
 Country: Nicaragua
 Country: Niger
 Country: Nigeria
 Country: Norway
 Country: Oman
 Country: Pakistan
 Country: Papua New Guinea
 Country: Paraguay
 Country: Peru
 Country: Philippines
 Country: Poland
 Country: Portugal
 Country: Qatar
 Country: Republic of Korea
 Country: Romania
 Country: Russia
 Country: Rwanda
 Country: Saudi Arabia
 Country: Senegal
 Country: Serbia
 Country: Sierra Leone
 Country: Slovakia
 Country: Slovenia
 Country: Somalia
 Country: South Africa
 Country: Spain
 Country: Sri Lanka
 Country: Sudan
 Country: Suriname
 Country: Sweden
 Country: Switzerland
 Country: Syria
 Country: Taiwan
 Country: Tajikistan
 Country: Tanzania
 Country: Thailand
 Country: Trinidad and Tobago
 Country: Tunisia
 Country: Turkey
 Country: Turkmenistan
 Country: Uganda
 Country: Ukraine
 Country: United Arab Emirates
 Country: United Kingdom
 Country: United States of America
 Country: Uruguay
 Country: Uzbekistan
 Country: Venezuela
 Country: Vietnam
 Country: Zambia
 Country: Zimbabwe
 Data1: Chromium
 Data1: Copper
 Data1: Gold
 Data1: Iron
 Data1: Manganese
 Data1: Nickel
 Data1: Osmium
 Data1: Rhodium
 Data1: Thulium
 Data1: Zirconium
 Production: Aluminium
 Production: Gold
 Production: Indium
 Production: Titanium
 Production: Uranium
 
tons (103)
 Country: Australia
 Country: Brazil
 Country: Canada
 Country: Chile
 Country: China
 Country: France
 Country: Germany
 Country: Hungary
 Country: Iceland
 Country: India
 Country: Japan
 Country: Kazakhstan
 Country: Malaysia
 Country: Norway
 Country: Peru
 Country: Russia
 Country: Slovakia
 Country: South Africa
 Country: Spain
 Country: Ukraine
 Country: United Kingdom
 Country: United States of America
 Country: Venezuela
 Data1: Aluminium
 Data1: Antimony
 Data1: Barium
 Data1: Beryllium
 Data1: Bismuth
 Data1: Boron
 Data1: Bromine
 Data1: Cadmium
 Data1: Caesium
 Data1: Calcium
 Data1: Cerium
 Data1: Chromium
 Data1: Cobalt
 Data1: Copper
 Data1: Dysprosium
 Data1: Erbium
 Data1: Europium
 Data1: Gadolinium
 Data1: Gallium
 Data1: Germanium
 Data1: Gold
 Data1: Helium
 Data1: Holmium
 Data1: Indium
 Data1: Iodine
 Data1: Iridium
 Data1: Lanthanum
 Data1: Lead
 Data1: Lithium
 Data1: Lutetium
 Data1: Magnesium
 Data1: Manganese
 Data1: Mercury
 Data1: Molybdenum
 Data1: Neodymium
 Data1: Nickel
 Data1: Niobium
 Data1: Nitrogen
 Data1: Osmium
 Data1: Oxygen
 Data1: Palladium
 Data1: Platinum
 Data1: Plutonium
 Data1: Potassium
 Data1: Praseodymium
 Data1: Protactinium
 Data1: Rhenium
 Data1: Samarium
 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: Ytterbium
 Data1: Yttrium
 Data1: Zinc
 Isotope: Plutonium
 On This Day... 16 February
 Production: Bromine
 Production: Caesium
 Production: Chromium
 Production: Iron
 Production: Mercury
 Production: Osmium
 Production: Palladium
 Production: Rhenium
 Production: Rhodium
 Production: Technetium
 
took (7)
 Biography: Dirk Coster
 Biography: Irene Joliot-Curie
 Biography: Julius Caesar Scaliger
 Biography: Marie Curie (Marya Sklodowska)
 Biography: Robert Wilhelm Bunsen
 Country: United States of America
 Glossary: X-Rays
 
tool (6)
 Biography: Robert Wilhelm Bunsen
 Compounds: Niobium
 Compounds: Tantalum
 Compounds: Titanium
 Compounds: Vanadium
 Compounds: Zirconium
 
tooling (1)
 Compounds: Titanium
 
tools (16)
 Compounds: Fluorine
 Compounds: Niobium
 Compounds: Tantalum
 Compounds: Titanium
 Compounds: Tungsten
 Compounds: Vanadium
 Compounds: Zirconium
 Data1: Beryllium
 Data1: Chromium
 Data1: Copper
 Data1: Niobium
 Data1: Plutonium
 Data1: Silicon
 Data1: Tantalum
 Data1: Tungsten
 Data1: Vanadium
 
toom (1)
 Reactions: Fluorine
 
tooth (4)
 Compounds: Boron
 Compounds: Sodium
 Data1: Gold
 Document: The Halogens (Group 17)
 
toothepaste (1)
 Compounds: Magnesium
 
toothpaste (5)
 Compounds: Sodium
 Data1: Fluorine
 Data1: Phosphorus
 Data1: Radium
 Data1: Tin
 
toothpastes (4)
 Compounds: Potassium
 Compounds: Sodium
 Compounds: Titanium
 Data1: Strontium
 
topaz (1)
 Glossary: Moh's Scale of Hardness
 
topical (3)
 Compounds: Magnesium
 Compounds: Silver
 Compounds: Zinc
 
topics (1)
 Biography: Gottfried Münzenberg
 
torbern (4)
 Biography: Johan Gadolin
 Biography: Karl Wilhelm Scheele
 Data1: Tungsten
 On This Day... 20 March
 
torbernite (1)
 Production: Uranium
 
torbjorn (2)
 Data1: Lawrencium
 Data1: Nobelium
 
torij (1)
 Names: Thorium
 
torio (1)
 Names: Thorium
 
torium (1)
 Names: Thorium
 
torment (1)
 Data1: Phosphorus
 
torpedoes (1)
 Compounds: Phosphorus
 
torricelli (1)
 On This Day... 15 October
 
total (143)
 Biography: Dmitriy Ivanovich Mendeleyev
 Compounds: Sodium
 Country: Albania
 Country: Algeria
 Country: Argentina
 Country: Armenia
 Country: Australia
 Country: Austria
 Country: Azerbaijan
 Country: Belgium
 Country: Bhutan
 Country: Bolivia
 Country: Bosnia and Herzegovina
 Country: Botswana
 Country: Brazil
 Country: Bulgaria
 Country: Burkina Faso
 Country: Burma (Myanmar)
 Country: Burundi
 Country: Cameroon
 Country: Canada
 Country: Chile
 Country: China
 Country: Colombia
 Country: Costa Rica
 Country: Cuba
 Country: Cyprus
 Country: Czech Republic
 Country: Democratic People's Republic of Korea
 Country: Democratic Republic of Congo
 Country: Ecuador
 Country: Egypt
 Country: Estonia
 Country: Ethiopia
 Country: Fiji
 Country: Finland
 Country: France
 Country: French Guiana
 Country: Gabon
 Country: Georgia
 Country: Germany
 Country: Ghana
 Country: Greece
 Country: Greenland
 Country: Guatemala
 Country: Guinea
 Country: Guyana
 Country: Honduras
 Country: Hungary
 Country: India
 Country: Indonesia
 Country: Iran
 Country: Ireland
 Country: Israel
 Country: Italy
 Country: Ivory Coast
 Country: Japan
 Country: Kazakhstan
 Country: Kenya
 Country: Kuwait
 Country: Kyrgyzstan
 Country: Laos
 Country: Libya
 Country: Macedonia
 Country: Madagascar
 Country: Malaysia
 Country: Mali
 Country: Mauritania
 Country: Mexico
 Country: Mongolia
 Country: Morocco
 Country: Namibia
 Country: Netherlands
 Country: New Zealand
 Country: Nicaragua
 Country: Niger
 Country: Nigeria
 Country: Norway
 Country: Oman
 Country: Pakistan
 Country: Papua New Guinea
 Country: Paraguay
 Country: Peru
 Country: Philippines
 Country: Poland
 Country: Portugal
 Country: Qatar
 Country: Republic of Korea
 Country: Romania
 Country: Russia
 Country: Rwanda
 Country: Saudi Arabia
 Country: Senegal
 Country: Serbia
 Country: Slovakia
 Country: Slovenia
 Country: South Africa
 Country: Spain
 Country: Sudan
 Country: Suriname
 Country: Sweden
 Country: Switzerland
 Country: Taiwan
 Country: Tajikistan
 Country: Tanzania
 Country: Thailand
 Country: Trinidad and Tobago
 Country: Tunisia
 Country: Turkey
 Country: Turkmenistan
 Country: Uganda
 Country: Ukraine
 Country: United Arab Emirates
 Country: United Kingdom
 Country: United States of America
 Country: Uruguay
 Country: Uzbekistan
 Country: Venezuela
 Country: Vietnam
 Country: Zambia
 Country: Zimbabwe
 Data1: Astatine
 Data1: Beryllium
 Data1: Carbon
 Data1: Helium
 Data1: Selenium
 Document: Understanding Electron Configuration Tables
 Equation: Total gas pressure as sum of partial pressures
 Equation: Van der Waals equation
 Glossary: Electron Volt
 Glossary: Gas
 Glossary: pH
 Production: Astatine
 Production: Erbium
 Production: Gold
 Production: Holmium
 Production: Lanthanum
 Production: Rhenium
 Production: Thulium
 Production: Titanium
 Reactions: Bromine
 Reactions: Chlorine
 Reactions: Iodine
 
totalled (2)
 Data1: Gold
 Production: Gold
 
totally (1)
 Data1: Tantalum
 
touch (3)
 Compounds: Indium
 Data1: Plutonium
 Glossary: Acid
 
touched (2)
 Compounds: Iodine
 Compounds: Nitrogen
 
touching (1)
 Glossary: Conduction
 
toughened (1)
 Data1: Lead
 
toughening (1)
 Compounds: Selenium
 
toughens (1)
 Compounds: Tin
 
toured (1)
 Biography: Sir Humphry Davy
 
tourmaline (1)
 Biography: Franz-Joseph Muller Freiherr von Reichenstein
 
toussaint (1)
 On This Day... 10 April
 
toward (3)
 Data1: Potassium
 Glossary: Emission Spectrum
 Production: Iridium
 
towards (12)
 Biography: Baron Axel Fredrik Cronstedt
 Data1: Ununquadium
 Glossary: Base
 Glossary: Positron Emission (Beta+ Decay)
 Reactions: Bromine
 Reactions: Calcium
 Reactions: Chlorine
 Reactions: Fluorine
 Reactions: Iodine
 Reactions: Scandium
 Reactions: Strontium
 Reactions: Yttrium
 
tower (1)
 Production: Iodine
 
towers (1)
 Biography: Philip Hauge Abelson
 
town (9)
 Compounds: Holmium
 Data1: Berkelium
 Data1: Erbium
 Data1: Gold
 Data1: Hafnium
 Data1: Holmium
 Data1: Strontium
 Data1: Ytterbium
 Data1: Yttrium
 
towns (2)
 Data1: Radon
 Production: Radon
 
townsend (1)
 On This Day... 18 March
 
toxic (67)
 Compounds: Arsenic
 Compounds: Barium
 Compounds: Bismuth
 Compounds: Cadmium
 Compounds: Carbon
 Compounds: Chlorine
 Compounds: Fluorine
 Compounds: Gallium
 Compounds: Iodine
 Compounds: Iron
 Compounds: Lead
 Compounds: Mercury
 Compounds: Nitrogen
 Compounds: Phosphorus
 Compounds: Silver
 Compounds: Sodium
 Compounds: Sulfur
 Compounds: Tellurium
 Compounds: Uranium
 Compounds: Zinc
 Data1: Antimony
 Data1: Arsenic
 Data1: Beryllium
 Data1: Bismuth
 Data1: Boron
 Data1: Bromine
 Data1: Cadmium
 Data1: Caesium
 Data1: Cerium
 Data1: Chlorine
 Data1: Chromium
 Data1: Cobalt
 Data1: Copper
 Data1: Germanium
 Data1: Holmium
 Data1: Indium
 Data1: Iodine
 Data1: Iridium
 Data1: Lead
 Data1: Lithium
 Data1: Manganese
 Data1: Mercury
 Data1: Niobium
 Data1: Oxygen
 Data1: Plutonium
 Data1: Polonium
 Data1: Protactinium
 Data1: Radon
 Data1: Rhodium
 Data1: Ruthenium
 Data1: Selenium
 Data1: Sulfur
 Data1: Tellurium
 Data1: Thallium
 Data1: Thulium
 Data1: Tin
 Data1: Uranium
 Data1: Vanadium
 Data1: Xenon
 Data1: Ytterbium
 Data1: Yttrium
 Document: The Halogens (Group 17)
 Glossary: Halogens
 On This Day... 27 February
 Production: Arsenic
 Production: Selenium
 Reactions: Osmium
 
toxicities (1)
 Data1: Molybdenum
 
toxicity (17)
 Compounds: Carbon
 Data1: Bismuth
 Data1: Cobalt
 Data1: Dysprosium
 Data1: Gadolinium
 Data1: Germanium
 Data1: Lutetium
 Data1: Molybdenum
 Data1: Neodymium
 Data1: Osmium
 Data1: Phosphorus
 Data1: Praseodymium
 Data1: Protactinium
 Data1: Zirconium
 Isotope: Hydrogen
 Production: Arsenic
 Reactions: Protactinium
 
toxicology (2)
 Biography: Ferdinand Frederic Henri Moissan
 On This Day... 17 December
 
toys (4)
 Compounds: Strontium
 Data1: Antimony
 Data1: Tin
 Glossary: Pyrophoric
 
trace (40)
 Biography: Robert Wilhelm Bunsen
 Biography: William Hyde Wollaston
 Compounds: Magnesium
 Compounds: Sulfur
 Country: Outer space
 Data1: Caesium
 Data1: Gadolinium
 Data1: Iodine
 Data1: Lithium
 Data1: Manganese
 Data1: Mendelevium
 Data1: Neptunium
 Data1: Plutonium
 Data1: Scandium
 Data1: Selenium
 Document: The Actinoid Series
 Document: The Halogens (Group 17)
 Glossary: Actinides
 Glossary: Actinoids
 Glossary: Air
 Isotope: Beryllium
 Isotope: Caesium
 Isotope: Carbon
 Isotope: Helium
 Isotope: Hydrogen
 Isotope: Lead
 Isotope: Plutonium
 Isotope: Radium
 Isotope: Technetium
 Production: Actinium
 Production: Francium
 Production: Gadolinium
 Production: Gallium
 Production: Neptunium
 Production: Nitrogen
 Production: Plutonium
 Production: Promethium
 Production: Scandium
 Production: Thallium
 Production: Xenon
 
traced (3)
 Compounds: Potassium
 Data1: Manganese
 Data1: Nickel
 
tracer (8)
 Biography: George Charles de Hevesy
 Data1: Antimony
 Data1: Iodine
 Data1: Phosphorus
 Isotope: Hydrogen
 Isotope: Iodine
 Isotope: Phosphorus
 Isotope: Technetium
 
tracers (3)
 Biography: George Charles de Hevesy
 Data1: Iodine
 Isotope: Iodine
 
traces (11)
 Biography: Per Teodor Cleve
 Compounds: Iridium
 Compounds: Osmium
 Data1: Beryllium
 Data1: Caesium
 Data1: Chromium
 Data1: Neodymium
 Data1: Samarium
 Production: Plutonium
 Production: Rubidium
 Production: Technetium
 
track (5)
 Biography: Jöns Jacob Berzelius
 Biography: Peter Armbruster
 Data1: Terbium
 Glossary: Spontaneous Fission
 Isotope: Strontium
 
tracks (3)
 Data1: Rutherfordium
 Glossary: Spontaneous Fission
 Glossary: Thermal Conductivity
 
tract (4)
 Biography: Julius Caesar Scaliger
 Compounds: Bismuth
 Data1: Palladium
 Data1: Xenon
 
trade (6)
 Biography: Joseph Priestley
 Compounds: Silicon
 Compounds: Sodium
 Country: United Kingdom
 Data1: Silver
 Data1: Tin
 
traded (2)
 Data1: Gold
 Data1: Platinum
 
trademark (1)
 On This Day... 14 May
 
trades (1)
 Glossary: Thermal Conductivity
 
tradition (1)
 Biography: Jöns Jacob Berzelius
 
traditional (3)
 Biography: Irene Joliot-Curie
 Data1: Praseodymium
 Data1: Sulfur
 
traditionally (6)
 Compounds: Calcium
 Compounds: Iron
 Data1: Bismuth
 Glossary: Acid
 Isotope: Bismuth
 Production: Magnesium
 
trail (2)
 Country: Canada
 Production: Indium
 
trails (1)
 Glossary: Spontaneous Fission
 
train (1)
 Data1: Phosphorus
 
training (2)
 Biography: Hans Christian Oersted
 Biography: Joseph Louis Gay-Lussac
 
traite (2)
 Biography: Louis Jacques Thenard
 Biography: Sir Humphry Davy
 
transactinide (2)
 Data1: Hafnium
 Glossary: Spontaneous Fission
 
transactinides (14)
 Data1: Bohrium
 Data1: Dubnium
 Data1: Hassium
 Data1: Meitnerium
 Data1: Rutherfordium
 Data1: Seaborgium
 Data1: Ununbium
 Data1: Ununquadium
 Data1: Ununtrium
 Glossary: Actinides
 Glossary: Actinoids
 Glossary: Metals
 Glossary: Transactinides
 Glossary: Transition Metals
 
transducers (4)
 Compounds: Barium
 Compounds: Dysprosium
 Compounds: Neodymium
 Compounds: Terbium
 
transduction (2)
 Compounds: Chlorine
 Compounds: Sodium
 
transfer (14)
 Compounds: Silicon
 Data1: Copper
 Data1: Lithium
 Glossary: Atomic Charge
 Glossary: Conduction
 Glossary: Electrical Conductivity
 Glossary: Ionic bonds
 Glossary: Isometric Transition
 Glossary: Oxidation State
 Glossary: Thermal Conductivity
 Glossary: Thermal Expansion
 On This Day... 21 July
 On This Day... 8 June
 Production: Hydrogen
 
transferred (1)
 Glossary: Electronegativity
 
transform (1)
 Data1: Mercury
 
transformation (4)
 Allotrope: Tin
 Allotrope: Ytterbium
 Biography: Lise Meitner
 On This Day... 22 July
 
transformed (2)
 Biography: Dmitriy Ivanovich Mendeleyev
 Isotope: Radium
 
transforms (4)
 Allotrope: Carbon
 Glossary: Alpha Decay
 Glossary: Double Electron Capture
 Glossary: Electron Capture
 
transient (1)
 Biography: Peter Armbruster
 
transistor (1)
 Data1: Germanium
 
transistors (6)
 Compounds: Hafnium
 Compounds: Zinc
 Data1: Aluminium
 Data1: Germanium
 Data1: Indium
 Data1: Molybdenum
 
transition (40)
 Data1: Cadmium
 Data1: Caesium
 Data1: Chromium
 Data1: Cobalt
 Data1: Copper
 Data1: Hafnium
 Data1: Helium
 Data1: Iron
 Data1: Manganese
 Data1: Mercury
 Data1: Molybdenum
 Data1: Nickel
 Data1: Niobium
 Data1: Osmium
 Data1: Rhenium
 Data1: Scandium
 Data1: Tantalum
 Data1: Technetium
 Data1: Titanium
 Data1: Tungsten
 Data1: Vanadium
 Data1: Yttrium
 Data1: Zinc
 Data1: Zirconium
 Document:
 Document: The Transition Metals (Groups 3 to 12)
 Glossary: Actinides
 Glossary: Actinoids
 Glossary: Alkali Metal
 Glossary: Enthalpy Change of Fusion (Heat of Fusion)
 Glossary: Inner Transition Metals
 Glossary: Isometric Transition
 Glossary: Lanthanides (old name)
 Glossary: Lanthanoids
 Glossary: Magnetic Ordering
 Glossary: Metals
 Glossary: Transition Metals
 On This Day... 14 June
 Production: Osmium
 Production: Strontium
 
transitional (1)
 Data1: Copper
 
transitions (2)
 Allotrope: Plutonium
 Compounds: Zirconium
 
translated (2)
 Biography: Antoine-Laurent de Lavoisier
 Data1: Tungsten
 
translational (1)
 Glossary: Temperature
 
translucent (1)
 Compounds: Cobalt
 
transmission (3)
 Compounds: Magnesium
 Data1: Aluminium
 Data1: Sodium
 
transmits (1)
 Compounds: Lithium
 
transmitted (1)
 On This Day... 13 May
 
transmitter (1)
 Document: The Halogens (Group 17)
 
transmutation (5)
 Biography: Frederick Soddy
 Data1: Lawrencium
 Data1: Mercury
 Production: Neptunium
 Production: Technetium
 
transparency (1)
 Compounds: Fluorine
 
transparent (4)
 Allotrope: Phosphorus
 Compounds: Germanium
 Compounds: Indium
 Glossary: Allotrope
 
transport (4)
 Compounds: Iron
 Data1: Mercury
 Data1: Phosphorus
 On This Day... 27 March
 
transportation (2)
 Data1: Nitrogen
 Data1: Phosphorus
 
transported (2)
 Data1: Copper
 Data1: Phosphorus
 
transports (1)
 Compounds: Iron
 
transuranic (5)
 Biography: Ida Eva Tacke Noddack
 Biography: Philip Hauge Abelson
 Data1: Mendelevium
 Data1: Ununoctium
 Glossary: Island of Stability
 
transuranics (1)
 Biography: Ida Eva Tacke Noddack
 
transuranium (7)
 Biography: Edwin Mattison McMillan
 Biography: Glenn Theodore Seaborg
 Data1: Californium
 Data1: Curium
 Data1: Fermium
 Data1: Neptunium
 Glossary: Magic Number
 
transverse (1)
 Glossary: Poisson Ratio
 
transylvania (3)
 Biography: Franz-Joseph Muller Freiherr von Reichenstein
 Data1: Tellurium
 Data1: Zinc
 
trap (1)
 Production: Francium
 
trapelia (1)
 Production: Uranium
 
trapped (5)
 Biography: Emilio Gino Segre
 Data1: Neon
 Data1: Zinc
 Glossary: Alpha Decay
 Production: Neon
 
travel (1)
 Glossary: Air
 
traveled (2)
 Biography: Hans Christian Oersted
 Data1: Lead
 
traveling (1)
 Biography: John William Strutt Rayleigh
 
travels (1)
 Biography: Robert Wilhelm Bunsen
 
travers (7)
 Biography: Morris Travers
 Biography: Sir William Ramsay
 Data1: Krypton
 Data1: Neon
 Data1: Xenon
 On This Day... 12 July
 On This Day... 24 January
 
treacherous (1)
 Data1: Sodium
 
treasury (1)
 Data1: Gold
 
treat (21)
 Biography: Jöns Jacob Berzelius
 Compounds: Arsenic
 Compounds: Bismuth
 Compounds: Calcium
 Compounds: Copper
 Compounds: Gold
 Compounds: Iodine
 Compounds: Iron
 Compounds: Lithium
 Compounds: Phosphorus
 Compounds: Samarium
 Compounds: Selenium
 Compounds: Sodium
 Compounds: Zinc
 Country: Peru
 Data1: Cadmium
 Data1: Caesium
 Data1: Lead
 Data1: Radon
 Data1: Zinc
 Glossary: Gamma Ray
 
treated (15)
 Biography: Julius Caesar Scaliger
 Compounds: Barium
 Compounds: Nitrogen
 Data1: Bismuth
 Data1: Chromium
 Data1: Fluorine
 Data1: Niobium
 Data1: Phosphorus
 Data1: Platinum
 Data1: Potassium
 Data1: Radium
 Isotope: Bismuth
 Production: Fluorine
 Production: Lead
 Reactions: Boron
 
treating (9)
 Compounds: Magnesium
 Data1: Actinium
 Data1: Fluorine
 Data1: Helium
 Data1: Lanthanum
 Data1: Radium
 Data1: Rhodium
 Isotope: Iodine
 Production: Fluorine
 
treatise (4)
 Biography: Julius Caesar Scaliger
 Data1: Gold
 Data1: Sulfur
 On This Day... 5 September
 
treatment (27)
 Allotrope: Carbon
 Biography: Irene Joliot-Curie
 Biography: Jöns Jacob Berzelius
 Compounds: Arsenic
 Compounds: Calcium
 Compounds: Chlorine
 Compounds: Lanthanum
 Compounds: Lithium
 Compounds: Magnesium
 Compounds: Nitrogen
 Compounds: Oxygen
 Compounds: Phosphorus
 Compounds: Silicon
 Compounds: Sodium
 Data1: Cadmium
 Data1: Iodine
 Data1: Lithium
 Data1: Palladium
 Equation: Ideal gas law
 Isotope: Cobalt
 Isotope: Iridium
 On This Day... 10 August
 On This Day... 27 January
 On This Day... 6 January
 Production: Hydrogen
 Production: Technetium
 Production: Zinc
 
treatments (2)
 Allotrope: Carbon
 Data1: Ruthenium
 
trees (2)
 Compounds: Calcium
 Production: Oxygen
 
tremendous (1)
 Biography: Robert Wilhelm Bunsen
 
tremors (1)
 Data1: Barium
 
trend (1)
 Biography: Robert Wilhelm Bunsen
 
trends (5)
 Document: The Alkali (Group 1) Metals
 Document: The Halogens (Group 17)
 Document: The Noble Gases (Group 18)
 Glossary: Halogens
 Glossary: Noble Gasses (inert gasses)
 
trewarthenick (1)
 Biography: William Gregor
 
tri (3)
 Data2: Calcium
 Production: Phosphorus
 Reactions: Neptunium
 
triads (1)
 On This Day... 15 December
 
trials (2)
 Data1: Ruthenium
 Production: Aluminium
 
triangle (1)
 Data1: Sulfur
 
tribe (1)
 Data1: Sulfur
 
tricalcium (1)
 Compounds: Phosphorus
 
trichloride (8)
 Biography: Michael Faraday
 Compounds: Nitrogen
 Data1: Antimony
 Data1: Boron
 Data1: Chlorine
 Data1: Indium
 On This Day... 12 February
 Reactions: Uranium
 
triclinic (1)
 Data2: Phosphorus
 
tried (5)
 Biography: Hennig Brand
 Data1: Dubnium
 Data1: Helium
 Data1: Lithium
 Production: Copper
 
trifluoride (10)
 Compounds: Antimony
 Data2: Carbon
 Data2: Rhodium
 Data2: Silver
 Data2: Tantalum
 Data2: Tungsten
 Reactions: Chlorine
 Reactions: Fluorine
 Reactions: Palladium
 Reactions: Uranium
 
trigonal (5)
 Allotrope: Selenium
 Data2: Antimony
 Data2: Arsenic
 Data2: Samarium
 Data2: Tellurium
 
trihalides (10)
 Reactions: Arsenic
 Reactions: Bismuth
 Reactions: Boron
 Reactions: Chromium
 Reactions: Gold
 Reactions: Iridium
 Reactions: Phosphorus
 Reactions: Rhodium
 Reactions: Scandium
 Reactions: Yttrium
 
triiodide (3)
 Compounds: Iodine
 Compounds: Nitrogen
 Data1: Iodine
 
triiodothyronine (2)
 Compounds: Iodine
 Data1: Iodine
 
trillion (5)
 Biography: Henry Cavendish
 Compounds: Zirconium
 Isotope: Carbon
 Production: Astatine
 Production: Helium
 
trim (1)
 Compounds: Titanium
 
trinidad (1)
 Country: Trinidad and Tobago
 
trinitrophenylmethylnitramine (1)
 On This Day... 17 April
 
trinitrotoluene (3)
 Compounds: Nitrogen
 Data1: Nitrogen
 Data1: Plutonium
 
trinity (2)
 Data1: Plutonium
 On This Day... 16 July
 
triorganotins (1)
 Data1: Tin
 
trioxide (16)
 Compounds: Antimony
 Compounds: Arsenic
 Compounds: Sulfur
 Compounds: Xenon
 Data1: Antimony
 Data1: Molybdenum
 Data1: Tantalum
 Data2: Selenium
 Reactions: Antimony
 Reactions: Arsenic
 Reactions: Bismuth
 Reactions: Magnesium
 Reactions: Molybdenum
 Reactions: Phosphorus
 Reactions: Tantalum
 Reactions: Tungsten
 
trip (2)
 Biography: Robert Wilhelm Bunsen
 Data1: Lithium
 
triphosphate (1)
 Data1: Phosphorus
 
trisulfide (1)
 Data1: Antimony
 
tritium (6)
 Compounds: Lithium
 Data1: Hydrogen
 Data1: Lithium
 Data1: Radium
 Isotope: Hydrogen
 Isotope: Lithium
 
triumph (1)
 Biography: Andre Louis Debierne
 
triuranium (1)
 Reactions: Uranium
 
trivalent (5)
 Data1: Cerium
 Data1: Erbium
 Data1: Lanthanum
 Glossary: Lanthanides (old name)
 Glossary: Lanthanoids
 
trixode (1)
 Reactions: Aluminium
 
troilite (1)
 Country: Outer space
 
troops (1)
 Biography: Irene Joliot-Curie
 
tropical (1)
 Production: Nickel
 
trough (1)
 On This Day... 24 March
 
troy (4)
 Data1: Gold
 Production: Gold
 Production: Palladium
 Production: Rhodium
 
true (9)
 Allotrope: Carbon
 Allotrope: Oxygen
 Biography: John Dalton
 Biography: Julius Caesar Scaliger
 Biography: Robert Wilhelm Bunsen
 Data1: Rubidium
 Data1: Zinc
 Glossary: Molecule
 On This Day... 22 February
 
truro (1)
 Biography: Sir Humphry Davy
 
truth (2)
 Biography: Julius Caesar Scaliger
 Compounds: Sodium
 
trying (3)
 Biography: Friedrich Ernst Dorn
 Biography: Georg Brandt
 Data1: Cerium
 
tswett (2)
 On This Day... 21 June
 On This Day... 21 March
 
tter (1)
 On This Day... 13 August
 
tube (12)
 Allotrope: Carbon
 Biography: Antoine Alexandre Brutus Bussy
 Biography: Robert Wilhelm Bunsen
 Biography: Sir William Crookes
 Compounds: Copper
 Data1: Beryllium
 Data1: Iron
 Data1: Neon
 Data1: Tantalum
 Data1: Tungsten
 Data1: Zirconium
 Reactions: Tellurium
 
tubercular (1)
 On This Day... 30 October
 
tuberculosis (3)
 Biography: Dmitriy Ivanovich Mendeleyev
 Biography: Irene Joliot-Curie
 Data1: Palladium
 
tubes (15)
 Compounds: Beryllium
 Compounds: Yttrium
 Data1: Cadmium
 Data1: Caesium
 Data1: Calcium
 Data1: Gadolinium
 Data1: Hafnium
 Data1: Neon
 Data1: Rubidium
 Data1: Strontium
 Data1: Tungsten
 Document: The Noble Gases (Group 18)
 Glossary: Noble Gasses (inert gasses)
 Glossary: X-Rays
 On This Day... 29 August
 
tubing (2)
 Data1: Copper
 Data1: Lead
 
tulij (1)
 Names: Thulium
 
tulio (1)
 Names: Thulium
 
tulium (1)
 Names: Thulium
 
tumor (2)
 Data1: Platinum
 Data1: Ruthenium
 
tumors (3)
 Data1: Argon
 Data1: Gallium
 Data1: Tantalum
 
tumours (1)
 Data1: Technetium
 
tung (1)
 Data1: Tungsten
 
tungs (1)
 Data1: Tungsten
 
tungstate (1)
 Production: Tungsten
 
tungstein (1)
 Data1: Cerium
 
tungsten (53)
 Atomic data: Tungsten
 Biography: Fausto de Elhuyar y de Suvisa
 Biography: Juan Jose Elhuyar
 Compounds: Tantalum
 Compounds: Thorium
 Compounds: Titanium
 Compounds: Tungsten
 Compounds: Vanadium
 Country: Australia
 Country: Austria
 Country: Bolivia
 Country: Brazil
 Country: Burma (Myanmar)
 Country: Canada
 Country: China
 Country: Democratic People's Republic of Korea
 Country: Kyrgyzstan
 Country: Mongolia
 Country: Portugal
 Country: Russia
 Country: Rwanda
 Country: Thailand
 Country: Uganda
 Country: Uzbekistan
 Data1: Boron
 Data1: Cerium
 Data1: Hafnium
 Data1: Iodine
 Data1: Niobium
 Data1: Rhenium
 Data1: Scandium
 Data1: Tantalum
 Data1: Thorium
 Data1: Tungsten
 Data2: Tungsten
 Document: Abundance of the Elements in the Solar System
 Document: The Actinoid Series
 Isotope: Technetium
 Isotope: Tungsten
 MAC data: Tungsten
 Names: Tungsten
 On This Day... 15 June
 On This Day... 30 December
 On This Day... 31 December
 On This Day... 31 January
 Production: Bismuth
 Production: Molybdenum
 Production: Scandium
 Production: Tungsten
 Reactions: Helium
 Reactions: Seaborgium
 Reactions: Tungsten
 Spectrum: Tungsten
 
tungstene (1)
 Names: Tungsten
 
tungstenio (1)
 Names: Tungsten
 
tungstenite (1)
 Data1: Tungsten
 
tungsteno (1)
 Names: Tungsten
 
tungstic (1)
 Data1: Tungsten
 
tunguska (1)
 Allotrope: Carbon
 
tunisia (2)
 Country: Tunisia
 Data1: Strontium
 
tunneling (1)
 Glossary: Alpha Decay
 
tunnels (1)
 Data1: Helium
 
turkey (8)
 Country: Turkey
 Country: United States of America
 Data1: Boron
 Data1: Osmium
 Production: Boron
 Production: Chromium
 Production: Nickel
 Production: Osmium
 
turkmenistan (2)
 Country: Turkmenistan
 Production: Sulfur
 
turku (1)
 Biography: Johan Gadolin
 
turn (11)
 Biography: Andre Louis Debierne
 Biography: Daniel Rutherford
 Biography: Ferdinand Frederic Henri Moissan
 Data1: Americium
 Data1: Caesium
 Data1: Holmium
 Data1: Radium
 Document: The Alkali (Group 1) Metals
 Glossary: Convection
 Glossary: Enthalpy Change of Fusion (Heat of Fusion)
 Production: Uranium
 
turned (13)
 Biography: Andre Louis Debierne
 Biography: Charles Hatchett
 Biography: Irene Joliot-Curie
 Biography: Joseph Louis Gay-Lussac
 Biography: Per Teodor Cleve
 Biography: Sir Humphry Davy
 Biography: Sir William Ramsay
 Data1: Europium
 Data1: Lead
 Data1: Technetium
 Data1: Thulium
 Data1: Vanadium
 Glossary: Temperature
 
turner (1)
 Biography: Jöns Jacob Berzelius
 
turning (2)
 Compounds: Copper
 Data1: Promethium
 
turnings (1)
 Data1: Vanadium
 
turns (4)
 Allotrope: Arsenic
 Compounds: Silver
 Document: The Alkali (Group 1) Metals
 Reactions: Zinc
 
turpentine (3)
 Compounds: Nitrogen
 Data2: Chlorine
 Data2: Tin
 
tuscan (1)
 On This Day... 8 January
 
tushratta (1)
 Data1: Gold
 
tutoring (1)
 Biography: Jöns Jacob Berzelius
 
tv (6)
 Compounds: Yttrium
 Data1: Europium
 Data1: Gadolinium
 Data1: Neon
 Data1: Scandium
 Data1: Selenium
 
tvs (1)
 Data1: Yttrium
 
twelve (2)
 Biography: Jöns Jacob Berzelius
 Biography: Julius Caesar Scaliger
 
twentieth (2)
 Data1: Lead
 Production: Uranium
 
twenty (7)
 Allotrope: Carbon
 Allotrope: Sulfur
 Biography: Julius Caesar Scaliger
 Biography: Michael Faraday
 Biography: Robert Wilhelm Bunsen
 Isotope: Barium
 Production: Xenon
 
twice (4)
 Data1: Aluminium
 Data1: Platinum
 Glossary: Moh's Scale of Hardness
 Production: Bismuth
 
twin (2)
 Data1: Neodymium
 Data1: Praseodymium
 
twins (1)
 Biography: Dmitriy Ivanovich Mendeleyev
 
two (143)
 Allotrope: Carbon
 Allotrope: Oxygen
 Allotrope: Sulfur
 Biography: (Gabriel) Daniel Fahrenheit
 Biography: Carl Gustav Mosander
 Biography: Dmitriy Ivanovich Mendeleyev
 Biography: Georges Urbain
 Biography: Henry Cavendish
 Biography: Irene Joliot-Curie
 Biography: Jean Charles Galissard de Marignac
 Biography: Johann Schroder
 Biography: Joseph Priestley
 Biography: Joseph W. Kennedy
 Biography: Julius Caesar Scaliger
 Biography: Karl Wilhelm Scheele
 Biography: Lise Meitner
 Biography: Louis Jacques Thenard
 Biography: Michael Faraday
 Biography: Per Teodor Cleve
 Biography: Pierre Curie
 Biography: Robert Wilhelm Bunsen
 Biography: Sir Humphry Davy
 Biography: William Hyde Wollaston
 Compounds: Iodine
 Compounds: Nitrogen
 Country: Australia
 Country: Brazil
 Country: Canada
 Country: China
 Country: Egypt
 Country: India
 Country: Malaysia
 Country: Norway
 Country: Republic of Korea
 Country: Russia
 Country: Sierra Leone
 Country: South Africa
 Country: Sri Lanka
 Country: Ukraine
 Country: United States of America
 Country: Vietnam
 Data1: Aluminium
 Data1: Arsenic
 Data1: Berkelium
 Data1: Caesium
 Data1: Carbon
 Data1: Cerium
 Data1: Chlorine
 Data1: Copper
 Data1: Gadolinium
 Data1: Gallium
 Data1: Holmium
 Data1: Hydrogen
 Data1: Lithium
 Data1: Manganese
 Data1: Molybdenum
 Data1: Osmium
 Data1: Palladium
 Data1: Plutonium
 Data1: Praseodymium
 Data1: Protactinium
 Data1: Radon
 Data1: Rutherfordium
 Data1: Samarium
 Data1: Seaborgium
 Data1: Technetium
 Data1: Thulium
 Data1: Titanium
 Data1: Ununhexium
 Data1: Ytterbium
 Data1: Yttrium
 Data1: Zinc
 Document: The Alkaline Earth Metals (Group 2)
 Document: Understanding Electron Configuration Tables
 Equation: Combined Gas Law
 Glossary:
 Glossary: Alkali Metal (alkaline-earth metals)
 Glossary: Alloy
 Glossary: Alpha Decay
 Glossary: Binary compound
 Glossary: Compound
 Glossary: Conduction
 Glossary: Covalent bonds
 Glossary: Double Beta Decay
 Glossary: Double Electron Capture
 Glossary: Electronegativity
 Glossary: Group
 Glossary: Ionic bonds
 Glossary: Island of Stability
 Glossary: Magnetic Ordering
 Glossary: Mole
 Glossary: Molecule
 Glossary: Neutron
 Glossary: Periods
 Glossary: Poisson Ratio
 Glossary: Proton
 Glossary: Shear Modulus
 Glossary: Transactinides
 Glossary: van der Waals radius
 Isotope: Barium
 Isotope: Helium
 Isotope: Hydrogen
 Isotope: Iridium
 Isotope: Neptunium
 Isotope: Tungsten
 Isotope: Uranium
 On This Day... 16 February
 Production: Berkelium
 Production: Cerium
 Production: Chromium
 Production: Erbium
 Production: Gold
 Production: Hafnium
 Production: Holmium
 Production: Hydrogen
 Production: Iodine
 Production: Mercury
 Production: Nickel
 Production: Plutonium
 Production: Strontium
 Production: Terbium
 Production: Thulium
 Production: Uranium
 Production: Yttrium
 Production: Zinc
 Reactions: Bohrium
 Reactions: Darmstadtium
 Reactions: Dubnium
 Reactions: Hassium
 Reactions: Lawrencium
 Reactions: Meitnerium
 Reactions: Palladium
 Reactions: Platinum
 Reactions: Roentgenium
 Reactions: Rutherfordium
 Reactions: Seaborgium
 Reactions: Ununbium
 Reactions: Ununhexium
 Reactions: Ununoctium
 Reactions: Ununpentium
 Reactions: Ununquadium
 Reactions: Ununseptium
 Reactions: Ununtrium
 
tyndall (1)
 Biography: John William Strutt Rayleigh
 
type (31)
 Biography: John William Strutt Rayleigh
 Biography: Pierre Jules César Janssen
 Biography: Sir William Crookes
 Compounds: Americium
 Compounds: Carbon
 Compounds: Niobium
 Country: Outer space
 Data1: Boron
 Data1: Gallium
 Data1: Lithium
 Data1: Manganese
 Data1: Rutherfordium
 Data1: Technetium
 Document:
 Glossary: Acid
 Glossary: Allotrope
 Glossary: Electron Capture
 Glossary: Electron Emission (Beta- Decay)
 Glossary: Electronegativity
 Glossary: Heat Capacity
 Glossary: Positron Emission (Beta+ Decay)
 Glossary: Rare Earth Elements
 Glossary: X-Rays
 Isotope: Americium
 Isotope: Nickel
 Production: Gold
 Production: Lead
 Production: Titanium
 Production: Zinc
 Production: Zirconium
 Reactions: Platinum
 
types (22)
 Allotrope: Carbon
 Biography: Joseph Louis Gay-Lussac
 Compounds: Iodine
 Compounds: Nitrogen
 Country: Outer space
 Data1: Caesium
 Data1: Iodine
 Data1: Lawrencium
 Data1: Lithium
 Data1: Sulfur
 Data1: Zinc
 Document:
 Glossary: Anti-Neutrino
 Glossary: Gamma Ray
 Glossary: Neutrino
 Glossary: Radiation
 Production: Hydrogen
 Production: Nickel
 Production: Silicon
 Production: Sulfur
 Production: Technetium
 Production: Titanium
 
typesetting (1)
 Data1: Bismuth
 
typical (12)
 Biography: Robert Wilhelm Bunsen
 Compounds: Calcium
 Compounds: Chlorine
 Compounds: Oxygen
 Data1: Europium
 Glossary: Alpha Decay
 Glossary: Neutrino
 Glossary: Young's Modulus
 Production: Gold
 Production: Rhodium
 Production: Ruthenium
 Production: Yttrium
 
typically (23)
 Allotrope: Carbon
 Compounds: Calcium
 Compounds: Gadolinium
 Compounds: Nitrogen
 Compounds: Silicon
 Compounds: Silver
 Compounds: Sulfur
 Data1: Copper
 Data1: Neodymium
 Data1: Plutonium
 Data1: Samarium
 Data1: Yttrium
 Glossary: Antiproton
 Glossary: Magnetic Ordering
 Glossary: Malleable
 Glossary: Plasma
 Production: Aluminium
 Production: Gallium
 Production: Hydrogen
 Production: Indium
 Production: Nickel
 Production: Praseodymium
 Production: Uranium