ABCDEFGHIJKLMNOPQRSTUVWXYZ
h+ (56)
 Document: The Lanthanoid Series
 Equation: Acid dissociation constant
 Equation: pH defined
 Glossary: pH
 Production: Hydrogen
 Reactions: Aluminium
 Reactions: Antimony
 Reactions: Arsenic
 Reactions: Barium
 Reactions: Bismuth
 Reactions: Boron
 Reactions: Bromine
 Reactions: Calcium
 Reactions: Carbon
 Reactions: Cerium
 Reactions: Chlorine
 Reactions: Chromium
 Reactions: Cobalt
 Reactions: Copper
 Reactions: Fluorine
 Reactions: Germanium
 Reactions: Hafnium
 Reactions: Hydrogen
 Reactions: Iodine
 Reactions: Iridium
 Reactions: Iron
 Reactions: Lead
 Reactions: Magnesium
 Reactions: Manganese
 Reactions: Mercury
 Reactions: Molybdenum
 Reactions: Nickel
 Reactions: Niobium
 Reactions: Nitrogen
 Reactions: Osmium
 Reactions: Oxygen
 Reactions: Palladium
 Reactions: Phosphorus
 Reactions: Platinum
 Reactions: Plutonium
 Reactions: Rhenium
 Reactions: Rhodium
 Reactions: Ruthenium
 Reactions: Selenium
 Reactions: Silicon
 Reactions: Silver
 Reactions: Sulfur
 Reactions: Tantalum
 Reactions: Tellurium
 Reactions: Tin
 Reactions: Titanium
 Reactions: Tungsten
 Reactions: Uranium
 Reactions: Vanadium
 Reactions: Zinc
 Reactions: Zirconium
 
h++ (1)
 Reactions: Silicon
 
h+1 (1)
 Data2: Hydrogen
 
h0 (1)
 Data2: Hydrogen
 
h2 (53)
 Compounds: Hydrogen
 Country: Outer space
 Data1: Hydrogen
 Data2: Hydrogen
 Document: The Lanthanoid Series
 Glossary: Molecule
 Production: Chlorine
 Production: Hydrogen
 Reactions: Aluminium
 Reactions: Antimony
 Reactions: Barium
 Reactions: Beryllium
 Reactions: Bismuth
 Reactions: Cadmium
 Reactions: Caesium
 Reactions: Calcium
 Reactions: Carbon
 Reactions: Cerium
 Reactions: Chromium
 Reactions: Cobalt
 Reactions: Copper
 Reactions: Dysprosium
 Reactions: Erbium
 Reactions: Europium
 Reactions: Gadolinium
 Reactions: Holmium
 Reactions: Hydrogen
 Reactions: Iron
 Reactions: Lanthanum
 Reactions: Lithium
 Reactions: Lutetium
 Reactions: Magnesium
 Reactions: Manganese
 Reactions: Neodymium
 Reactions: Nickel
 Reactions: Potassium
 Reactions: Praseodymium
 Reactions: Promethium
 Reactions: Radium
 Reactions: Rubidium
 Reactions: Samarium
 Reactions: Scandium
 Reactions: Silicon
 Reactions: Sodium
 Reactions: Strontium
 Reactions: Terbium
 Reactions: Thallium
 Reactions: Thulium
 Reactions: Tin
 Reactions: Titanium
 Reactions: Ytterbium
 Reactions: Yttrium
 Reactions: Zinc
 
h20 (2)
 Reactions: Bromine
 Reactions: Iodine
 
h2aso3 (1)
 Reactions: Arsenic
 
h2aso4 (1)
 Reactions: Arsenic
 
h2b4o7 (1)
 Reactions: Boron
 
h2bo3 (1)
 Reactions: Boron
 
h2c2o4 (1)
 Reactions: Carbon
 
h2co3 (1)
 Glossary: Acid
 
h2gao3 (1)
 Reactions: Gallium
 
h2geo3 (1)
 Reactions: Germanium
 
h2moo4 (1)
 Reactions: Molybdenum
 
h2o (180)
 Compounds: Aluminium
 Compounds: Boron
 Compounds: Cobalt
 Compounds: Copper
 Compounds: Iron
 Compounds: Magnesium
 Compounds: Oxygen
 Compounds: Sodium
 Compounds: Uranium
 Compounds: Zinc
 Country: Afghanistan
 Country: Algeria
 Country: Argentina
 Country: Australia
 Country: Austria
 Country: Azerbaijan
 Country: Bhutan
 Country: Brazil
 Country: Bulgaria
 Country: Burma (Myanmar)
 Country: Canada
 Country: Chile
 Country: China
 Country: Colombia
 Country: Croatia
 Country: Cuba
 Country: Cyprus
 Country: Czech Republic
 Country: Dominican Republic
 Country: Ecuador
 Country: Egypt
 Country: El Salvador
 Country: Eritrea
 Country: Ethiopia
 Country: France
 Country: Georgia
 Country: Germany
 Country: Greece
 Country: Guatemala
 Country: Honduras
 Country: Hungary
 Country: India
 Country: Indonesia
 Country: Iran
 Country: Ireland
 Country: Israel
 Country: Italy
 Country: Jamaica
 Country: Jordan
 Country: Kenya
 Country: Laos
 Country: Latvia
 Country: Libya
 Country: Macedonia
 Country: Madagascar
 Country: Mauritania
 Country: Mexico
 Country: Moldova
 Country: Mongolia
 Country: Morocco
 Country: Nicaragua
 Country: Niger
 Country: Norway
 Country: Oman
 Country: Pakistan
 Country: Paraguay
 Country: Peru
 Country: Poland
 Country: Portugal
 Country: Romania
 Country: Russia
 Country: Saudi Arabia
 Country: Serbia
 Country: Slovakia
 Country: Somalia
 Country: South Africa
 Country: Spain
 Country: Sudan
 Country: Switzerland
 Country: Syria
 Country: Tanzania
 Country: Thailand
 Country: Tunisia
 Country: Turkey
 Country: Ukraine
 Country: United Kingdom
 Country: United States of America
 Country: Uzbekistan
 Country: Venezuela
 Country: Vietnam
 Data1: Boron
 Data1: Calcium
 Data1: Copper
 Data1: Hafnium
 Data1: Magnesium
 Data1: Potassium
 Data1: Rubidium
 Data1: Uranium
 Data1: Vanadium
 Glossary: Binary compound
 Glossary: Endothermic
 Glossary: Mole
 Production: Arsenic
 Production: Calcium
 Production: Cerium
 Production: Chlorine
 Production: Hafnium
 Production: Hydrogen
 Production: Magnesium
 Production: Vanadium
 Reactions: Aluminium
 Reactions: Antimony
 Reactions: Arsenic
 Reactions: Barium
 Reactions: Beryllium
 Reactions: Bismuth
 Reactions: Boron
 Reactions: Bromine
 Reactions: Calcium
 Reactions: Carbon
 Reactions: Cerium
 Reactions: Chlorine
 Reactions: Chromium
 Reactions: Cobalt
 Reactions: Copper
 Reactions: Dysprosium
 Reactions: Erbium
 Reactions: Europium
 Reactions: Fluorine
 Reactions: Gadolinium
 Reactions: Germanium
 Reactions: Hafnium
 Reactions: Holmium
 Reactions: Hydrogen
 Reactions: Iodine
 Reactions: Iridium
 Reactions: Iron
 Reactions: Lanthanum
 Reactions: Lead
 Reactions: Lutetium
 Reactions: Magnesium
 Reactions: Manganese
 Reactions: Mercury
 Reactions: Molybdenum
 Reactions: Neodymium
 Reactions: Nickel
 Reactions: Niobium
 Reactions: Nitrogen
 Reactions: Osmium
 Reactions: Oxygen
 Reactions: Palladium
 Reactions: Phosphorus
 Reactions: Platinum
 Reactions: Plutonium
 Reactions: Praseodymium
 Reactions: Radium
 Reactions: Rhenium
 Reactions: Rhodium
 Reactions: Ruthenium
 Reactions: Scandium
 Reactions: Selenium
 Reactions: Silicon
 Reactions: Silver
 Reactions: Sodium
 Reactions: Strontium
 Reactions: Sulfur
 Reactions: Tantalum
 Reactions: Tellurium
 Reactions: Terbium
 Reactions: Thallium
 Reactions: Thulium
 Reactions: Tin
 Reactions: Titanium
 Reactions: Tungsten
 Reactions: Uranium
 Reactions: Vanadium
 Reactions: Ytterbium
 Reactions: Yttrium
 Reactions: Zinc
 Reactions: Zirconium
 
h2o1 (1)
 Reactions: Sulfur
 
h2o2 (7)
 Data1: Oxygen
 Data2: Chromium
 Data2: Lead
 Data2: Platinum
 Data2: Silver
 Reactions: Hydrogen
 Reactions: Oxygen
 
h2o22rboh (1)
 Reactions: Rubidium
 
h2o2csoh (1)
 Reactions: Caesium
 
h2o2koh (1)
 Reactions: Potassium
 
h2o2lioh (1)
 Reactions: Lithium
 
h2o2rboh (1)
 Reactions: Rubidium
 
h2o2sm (1)
 Reactions: Samarium
 
h2o3 (2)
 Reactions: Mercury
 Reactions: Zirconium
 
h2oco (1)
 Reactions: Carbon
 
h2po3 (1)
 Reactions: Phosphorus
 
h2po4 (1)
 Reactions: Phosphorus
 
h2s (3)
 Data1: Sulfur
 Reactions: Silver
 Reactions: Sulfur
 
h2se (1)
 Reactions: Selenium
 
h2seo3 (1)
 Reactions: Selenium
 
h2sio3 (1)
 Reactions: Silicon
 
h2so3 (1)
 Reactions: Sulfur
 
h2so4 (37)
 Compounds: Sulfur
 Data1: Sulfur
 Data1: Tellurium
 Glossary: Acid
 Production: Thorium
 Production: Zinc
 Reactions: Aluminium
 Reactions: Beryllium
 Reactions: Cadmium
 Reactions: Caesium
 Reactions: Cerium
 Reactions: Cobalt
 Reactions: Copper
 Reactions: Dysprosium
 Reactions: Erbium
 Reactions: Europium
 Reactions: Gadolinium
 Reactions: Holmium
 Reactions: Iron
 Reactions: Lanthanum
 Reactions: Lithium
 Reactions: Lutetium
 Reactions: Magnesium
 Reactions: Manganese
 Reactions: Neodymium
 Reactions: Nickel
 Reactions: Praseodymium
 Reactions: Promethium
 Reactions: Rhenium
 Reactions: Rubidium
 Reactions: Samarium
 Reactions: Sodium
 Reactions: Technetium
 Reactions: Terbium
 Reactions: Thulium
 Reactions: Ytterbium
 Reactions: Zinc
 
h2so42rb+ (1)
 Reactions: Rubidium
 
h2te (1)
 Reactions: Tellurium
 
h2teo4 (1)
 Reactions: Tellurium
 
h2zro3 (1)
 Reactions: Zirconium
 
h3aso3 (1)
 Reactions: Arsenic
 
h3aso4 (2)
 Compounds: Arsenic
 Reactions: Arsenic
 
h3aso42 (1)
 Reactions: Arsenic
 
h3bo3 (3)
 Compounds: Boron
 Data1: Boron
 Reactions: Boron
 
h3no3s (1)
 Compounds: Sulfur
 
h3o+ (1)
 Glossary: Base
 
h3po2 (1)
 Reactions: Phosphorus
 
h3po3 (1)
 Reactions: Phosphorus
 
h3po4 (2)
 Compounds: Nitrogen
 Reactions: Phosphorus
 
h4p2o6 (1)
 Reactions: Phosphorus
 
h5io6 (1)
 Reactions: Iodine
 
h6 (2)
 Data2: Erbium
 Data2: Fermium
 
ha (3)
 Data1: Dubnium
 Equation: Acid dissociation constant
 Equation: Base ionisation constant
 
haber (4)
 Data1: Chlorine
 On This Day... 9 December
 Production: Gold
 Production: Hydrogen
 
habit (3)
 Biography: Robert Wilhelm Bunsen
 Compounds: Fluorine
 Isotope: Cobalt
 
habits (1)
 Data1: Lead
 
habsburg (1)
 Data1: Uranium
 
hachett (1)
 Biography: Charles Hatchett
 
haematite (2)
 Data1: Iron
 Production: Iron
 
haemoglobin (1)
 Compounds: Iron
 
haemogloblin (1)
 Compounds: Copper
 
hafnia (1)
 Data1: Hafnium
 
hafnij (1)
 Names: Hafnium
 
hafnio (1)
 Names: Hafnium
 
hafnium (19)
 Atomic data: Hafnium
 Biography: Dirk Coster
 Biography: George Charles de Hevesy
 Compounds: Hafnium
 Compounds: Zirconium
 Data1: Hafnium
 Data2: Hafnium
 Document: Abundance of the Elements in the Solar System
 Isotope: Hafnium
 Isotope: Tungsten
 Isotope: Uranium
 MAC data: Hafnium
 Names: Hafnium
 On This Day... 5 October
 Production: Hafnium
 Production: Zirconium
 Reactions: Hafnium
 Reactions: Rutherfordium
 Spectrum: Hafnium
 
hahn (10)
 Biography: Gottfried Münzenberg
 Biography: Ida Eva Tacke Noddack
 Biography: Lise Meitner
 Biography: Otto Hahn
 Data1: Dubnium
 Data1: Protactinium
 On This Day... 17 December
 On This Day... 22 February
 On This Day... 26 January
 On This Day... 8 March
 
hahnium (3)
 Biography: Albert Ghiorso
 Data1: Dubnium
 Data1: Hassium
 
hair (6)
 Allotrope: Carbon
 Compounds: Selenium
 Compounds: Silicon
 Compounds: Sodium
 Data1: Copper
 Data1: Radium
 
halban (1)
 On This Day... 19 March
 
hales (1)
 On This Day... 17 September
 
half (238)
 Biography: Antoine-Laurent de Lavoisier
 Biography: Robert Wilhelm Bunsen
 Compounds: Radium
 Country: Outer space
 Data1: Americium
 Data1: Astatine
 Data1: Berkelium
 Data1: Bismuth
 Data1: Bohrium
 Data1: Californium
 Data1: Chlorine
 Data1: Chromium
 Data1: Curium
 Data1: Darmstadtium
 Data1: Dubnium
 Data1: Einsteinium
 Data1: Fermium
 Data1: Francium
 Data1: Gold
 Data1: Indium
 Data1: Iodine
 Data1: Lawrencium
 Data1: Lithium
 Data1: Mendelevium
 Data1: Neptunium
 Data1: Nobelium
 Data1: Promethium
 Data1: Protactinium
 Data1: Rutherfordium
 Data1: Seaborgium
 Data1: Technetium
 Data1: Tellurium
 Data1: Ununbium
 Data1: Ununhexium
 Document: The Actinoid Series
 Equation: Graham's Law
 Glossary: Actinides
 Glossary: Actinoids
 Glossary: Atomic Radius
 Glossary: Double Electron Capture
 Glossary: Doubly Magic
 Glossary: Half Life
 Glossary: Island of Stability
 Glossary: Neutrino
 Glossary: Radioactivity
 Glossary: Spontaneous Fission
 Glossary: van der Waals radius
 Isotope: Actinium
 Isotope: Aluminium
 Isotope: Americium
 Isotope: Antimony
 Isotope: Argon
 Isotope: Arsenic
 Isotope: Astatine
 Isotope: Barium
 Isotope: Berkelium
 Isotope: Beryllium
 Isotope: Bismuth
 Isotope: Bohrium
 Isotope: Cadmium
 Isotope: Caesium
 Isotope: Calcium
 Isotope: Californium
 Isotope: Carbon
 Isotope: Cerium
 Isotope: Chlorine
 Isotope: Chromium
 Isotope: Cobalt
 Isotope: Curium
 Isotope: Darmstadtium
 Isotope: Dubnium
 Isotope: Dysprosium
 Isotope: Einsteinium
 Isotope: Erbium
 Isotope: Europium
 Isotope: Fermium
 Isotope: Fluorine
 Isotope: Francium
 Isotope: Gadolinium
 Isotope: Germanium
 Isotope: Gold
 Isotope: Hafnium
 Isotope: Hassium
 Isotope: Helium
 Isotope: Hydrogen
 Isotope: Indium
 Isotope: Iodine
 Isotope: Iridium
 Isotope: Iron
 Isotope: Krypton
 Isotope: Lanthanum
 Isotope: Lawrencium
 Isotope: Lead
 Isotope: Lutetium
 Isotope: Manganese
 Isotope: Meitnerium
 Isotope: Mendelevium
 Isotope: Mercury
 Isotope: Molybdenum
 Isotope: Neodymium
 Isotope: Neptunium
 Isotope: Nickel
 Isotope: Niobium
 Isotope: Nitrogen
 Isotope: Nobelium
 Isotope: Osmium
 Isotope: Palladium
 Isotope: Phosphorus
 Isotope: Platinum
 Isotope: Plutonium
 Isotope: Polonium
 Isotope: Potassium
 Isotope: Praseodymium
 Isotope: Promethium
 Isotope: Protactinium
 Isotope: Radium
 Isotope: Radon
 Isotope: Rhenium
 Isotope: Rhodium
 Isotope: Roentgenium
 Isotope: Rubidium
 Isotope: Ruthenium
 Isotope: Rutherfordium
 Isotope: Samarium
 Isotope: Scandium
 Isotope: Seaborgium
 Isotope: Selenium
 Isotope: Silicon
 Isotope: Silver
 Isotope: Sodium
 Isotope: Strontium
 Isotope: Sulfur
 Isotope: Tantalum
 Isotope: Technetium
 Isotope: Tellurium
 Isotope: Terbium
 Isotope: Thallium
 Isotope: Thorium
 Isotope: Thulium
 Isotope: Tin
 Isotope: Titanium
 Isotope: Tungsten
 Isotope: Ununbium
 Isotope: Ununhexium
 Isotope: Ununoctium
 Isotope: Ununpentium
 Isotope: Ununquadium
 Isotope: Ununtrium
 Isotope: Uranium
 Isotope: Vanadium
 Isotope: Xenon
 Isotope: Ytterbium
 Isotope: Yttrium
 Isotope: Zinc
 Isotope: Zirconium
 On This Day... 29 December
 Production: Astatine
 Production: Berkelium
 Production: Californium
 Production: Curium
 Production: Einsteinium
 Production: Hafnium
 Production: Mendelevium
 Production: Neptunium
 Production: Nobelium
 Production: Plutonium
 Production: Polonium
 Production: Radon
 Production: Rhodium
 Production: Technetium
 Production: Thorium
 Reactions: Aluminium
 Reactions: Antimony
 Reactions: Arsenic
 Reactions: Barium
 Reactions: Beryllium
 Reactions: Bismuth
 Reactions: Boron
 Reactions: Bromine
 Reactions: Cadmium
 Reactions: Caesium
 Reactions: Calcium
 Reactions: Carbon
 Reactions: Cerium
 Reactions: Chlorine
 Reactions: Chromium
 Reactions: Cobalt
 Reactions: Copper
 Reactions: Fluorine
 Reactions: Gallium
 Reactions: Germanium
 Reactions: Gold
 Reactions: Hafnium
 Reactions: Hydrogen
 Reactions: Indium
 Reactions: Iodine
 Reactions: Iridium
 Reactions: Iron
 Reactions: Lanthanum
 Reactions: Lead
 Reactions: Lithium
 Reactions: Magnesium
 Reactions: Manganese
 Reactions: Mercury
 Reactions: Molybdenum
 Reactions: Nickel
 Reactions: Niobium
 Reactions: Nitrogen
 Reactions: Osmium
 Reactions: Oxygen
 Reactions: Palladium
 Reactions: Phosphorus
 Reactions: Platinum
 Reactions: Plutonium
 Reactions: Potassium
 Reactions: Radium
 Reactions: Rhenium
 Reactions: Rhodium
 Reactions: Rubidium
 Reactions: Ruthenium
 Reactions: Scandium
 Reactions: Selenium
 Reactions: Silicon
 Reactions: Silver
 Reactions: Sodium
 Reactions: Strontium
 Reactions: Sulfur
 Reactions: Tantalum
 Reactions: Tellurium
 Reactions: Thallium
 Reactions: Thorium
 Reactions: Tin
 Reactions: Titanium
 Reactions: Tungsten
 Reactions: Uranium
 Reactions: Vanadium
 Reactions: Zinc
 Reactions: Zirconium
 
halflives (1)
 Production: Ruthenium
 
halfpence (1)
 Biography: Michael Faraday
 
halide (5)
 Compounds: Dysprosium
 Compounds: Scandium
 Data1: Germanium
 Data1: Neodymium
 Document: The Halogens (Group 17)
 
halides (31)
 Compounds: Palladium
 Document: The Alkaline Earth Metals (Group 2)
 Document: The Halogens (Group 17)
 On This Day... 1 April
 Production: Uranium
 Reactions: Aluminium
 Reactions: Caesium
 Reactions: Cerium
 Reactions: Dysprosium
 Reactions: Erbium
 Reactions: Europium
 Reactions: Gadolinium
 Reactions: Hafnium
 Reactions: Holmium
 Reactions: Iron
 Reactions: Lanthanum
 Reactions: Lithium
 Reactions: Lutetium
 Reactions: Neodymium
 Reactions: Niobium
 Reactions: Potassium
 Reactions: Praseodymium
 Reactions: Rubidium
 Reactions: Samarium
 Reactions: Sodium
 Reactions: Tantalum
 Reactions: Terbium
 Reactions: Thulium
 Reactions: Titanium
 Reactions: Ytterbium
 Reactions: Zirconium
 
halite (4)
 Compounds: Calcium
 Compounds: Chlorine
 Compounds: Sodium
 Production: Chlorine
 
hall (3)
 On This Day... 16 February
 On This Day... 23 February
 Production: Aluminium
 
hallmark (1)
 Biography: Jöns Jacob Berzelius
 
halo (2)
 Data2: Hydrogen
 Isotope: Helium
 
halogen (11)
 Data1: Astatine
 Data1: Bromine
 Data1: Chlorine
 Data1: Fluorine
 Data1: Iodine
 Data1: Ununseptium
 Document: The Halogens (Group 17)
 Glossary: Alkali Metal
 Glossary: Halogens
 Production: Fluorine
 Reactions: Iridium
 
halogenated (3)
 Data2: Aluminium
 Data2: Antimony
 Data2: Arsenic
 
halogenides (1)
 Production: Boron
 
halogens (103)
 Allotrope: Phosphorus
 Compounds: Hydrogen
 Compounds: Plutonium
 Data1: Aluminium
 Data1: Antimony
 Data1: Astatine
 Data1: Iodine
 Data1: Lanthanum
 Data1: Magnesium
 Data1: Ruthenium
 Data1: Titanium
 Data2: Hydrogen
 Data2: Phosphorus
 Document: The Alkali (Group 1) Metals
 Document: The Alkaline Earth Metals (Group 2)
 Document: The Halogens (Group 17)
 Glossary: Alkali Metal
 Glossary: Alkali Metal (alkaline-earth metals)
 Glossary: Group
 Glossary: Halogens
 Glossary: Non-Metals
 Reactions: Aluminium
 Reactions: Antimony
 Reactions: Argon
 Reactions: Arsenic
 Reactions: Astatine
 Reactions: Beryllium
 Reactions: Bismuth
 Reactions: Boron
 Reactions: Bromine
 Reactions: Cadmium
 Reactions: Caesium
 Reactions: Calcium
 Reactions: Carbon
 Reactions: Cerium
 Reactions: Chlorine
 Reactions: Chromium
 Reactions: Cobalt
 Reactions: Copper
 Reactions: Dysprosium
 Reactions: Erbium
 Reactions: Europium
 Reactions: Fluorine
 Reactions: Gadolinium
 Reactions: Gold
 Reactions: Hafnium
 Reactions: Holmium
 Reactions: Hydrogen
 Reactions: Iodine
 Reactions: Iridium
 Reactions: Iron
 Reactions: Krypton
 Reactions: Lanthanum
 Reactions: Lead
 Reactions: Lithium
 Reactions: Lutetium
 Reactions: Magnesium
 Reactions: Manganese
 Reactions: Mercury
 Reactions: Molybdenum
 Reactions: Neodymium
 Reactions: Neon
 Reactions: Neptunium
 Reactions: Nickel
 Reactions: Niobium
 Reactions: Nitrogen
 Reactions: Osmium
 Reactions: Oxygen
 Reactions: Palladium
 Reactions: Phosphorus
 Reactions: Platinum
 Reactions: Plutonium
 Reactions: Polonium
 Reactions: Potassium
 Reactions: Praseodymium
 Reactions: Radon
 Reactions: Rhenium
 Reactions: Rhodium
 Reactions: Rubidium
 Reactions: Ruthenium
 Reactions: Samarium
 Reactions: Scandium
 Reactions: Selenium
 Reactions: Silicon
 Reactions: Silver
 Reactions: Sodium
 Reactions: Strontium
 Reactions: Sulfur
 Reactions: Tantalum
 Reactions: Technetium
 Reactions: Tellurium
 Reactions: Terbium
 Reactions: Thallium
 Reactions: Thulium
 Reactions: Titanium
 Reactions: Tungsten
 Reactions: Uranium
 Reactions: Vanadium
 Reactions: Xenon
 Reactions: Ytterbium
 Reactions: Yttrium
 Reactions: Zinc
 Reactions: Zirconium
 
halske (2)
 Data1: Osmium
 Data1: Tungsten
 
hamburg (2)
 Biography: Emilio Gino Segre
 Data1: Phosphorus
 
hamilton (2)
 Biography: Julius Caesar Scaliger
 On This Day... 27 February
 
hammered (3)
 Data1: Zinc
 Glossary: Malleable
 Glossary: Non-Metals
 
hammett (1)
 On This Day... 7 April
 
hampshire (1)
 Data1: Thulium
 
han (1)
 Compounds: Barium
 
hand (8)
 Compounds: Boron
 Compounds: Sodium
 Data1: Europium
 Data1: Gallium
 Data1: Sodium
 Document: The Halogens (Group 17)
 Glossary: Alpha Decay
 Glossary: X-Rays
 
handbook (1)
 Glossary: Thermal Conductivity
 
handful (1)
 Compounds: Helium
 
handled (19)
 Compounds: Cadmium
 Compounds: Lead
 Compounds: Zinc
 Data1: Beryllium
 Data1: Cobalt
 Data1: Fluorine
 Data1: Iodine
 Data1: Lutetium
 Data1: Potassium
 Data1: Promethium
 Data1: Radium
 Data1: Sodium
 Data1: Sulfur
 Data1: Tellurium
 Data1: Thallium
 Data1: Thulium
 Glossary: Halogens
 Glossary: Pyrophoric
 Reactions: Phosphorus
 
handling (7)
 Allotrope: Plutonium
 Biography: Joseph W. Kennedy
 Data1: Americium
 Data1: Beryllium
 Data1: Boron
 Data1: Polonium
 Data1: Radium
 
hands (4)
 Biography: Julius Caesar Scaliger
 Biography: Robert Wilhelm Bunsen
 Data1: Gallium
 Data1: Zinc
 
hanford (1)
 Data1: Plutonium
 
hannover (1)
 Biography: Martin Heinrich Klaproth
 
hannspeter (1)
 On This Day... 22 August
 
hans (8)
 Biography: Hans Christian Oersted
 Biography: Sir Humphry Davy
 Biography: William Hyde Wollaston
 Data1: Aluminium
 On This Day... 14 August
 On This Day... 16 February
 On This Day... 18 January
 On This Day... 25 August
 
hanzhong (1)
 Data1: Sulfur
 
happen (3)
 Biography: Pierre Curie
 Data1: Platinum
 Glossary: Electron Capture
 
happened (6)
 Biography: Carl Gustav Mosander
 Biography: Joseph Louis Gay-Lussac
 Data1: Lead
 Data1: Vanadium
 Data1: Yttrium
 On This Day... 5 January
 
happening (1)
 Biography: Friedrich Ernst Dorn
 
happens (7)
 Allotrope: Carbon
 Country: China
 Country: United Kingdom
 Glossary: Atomic Number (Z)
 Glossary: Magnetic Ordering
 Production: Dysprosium
 Production: Europium
 
happiness (2)
 Biography: Joseph Priestley
 Biography: Julius Caesar Scaliger
 
happy (1)
 Data1: Bohrium
 
hard (23)
 Biography: Albert Ghiorso
 Biography: Irene Joliot-Curie
 Compounds: Boron
 Compounds: Chromium
 Compounds: Lead
 Compounds: Neodymium
 Compounds: Niobium
 Compounds: Rhenium
 Compounds: Sodium
 Compounds: Tantalum
 Compounds: Titanium
 Compounds: Vanadium
 Compounds: Zirconium
 Data1: Boron
 Data1: Cobalt
 Data1: Dysprosium
 Data1: Europium
 Data1: Neodymium
 Data1: Silicon
 Glossary: Allotrope
 Glossary: Metals
 Glossary: Moh's Scale of Hardness
 Production: Gold
 
harden (2)
 Data1: Ruthenium
 Data1: Titanium
 
hardened (2)
 Data1: Gold
 Glossary: Brinell Hardness
 
hardener (1)
 Data1: Antimony
 
hardeners (1)
 Data1: Lithium
 
hardening (4)
 Data1: Iridium
 Data1: Molybdenum
 Data1: Rhodium
 Data1: Tin
 
harder (7)
 Allotrope: Carbon
 Data1: Aluminium
 Data1: Arsenic
 Data1: Gold
 Data1: Manganese
 Glossary: Electronegativity
 Glossary: Moh's Scale of Hardness
 
hardest (6)
 Allotrope: Carbon
 Compounds: Tantalum
 Data1: Carbon
 Data1: Silicon
 Data1: Tungsten
 Glossary: Moh's Scale of Hardness
 
hardmetals (1)
 Data1: Tungsten
 
hardness (87)
 Compounds: Boron
 Compounds: Rhenium
 Compounds: Silicon
 Compounds: Tungsten
 Data1: Antimony
 Data1: Beryllium
 Data1: Erbium
 Data1: Iridium
 Data1: Lanthanum
 Data1: Manganese
 Data1: Tungsten
 Data1: Yttrium
 Data2: Aluminium
 Data2: Antimony
 Data2: Arsenic
 Data2: Barium
 Data2: Beryllium
 Data2: Bismuth
 Data2: Boron
 Data2: Cadmium
 Data2: Caesium
 Data2: Calcium
 Data2: Carbon
 Data2: Cerium
 Data2: Chromium
 Data2: Cobalt
 Data2: Copper
 Data2: Dysprosium
 Data2: Erbium
 Data2: Europium
 Data2: Gadolinium
 Data2: Gallium
 Data2: Germanium
 Data2: Gold
 Data2: Hafnium
 Data2: Holmium
 Data2: Indium
 Data2: Iridium
 Data2: Iron
 Data2: Lanthanum
 Data2: Lead
 Data2: Lithium
 Data2: Lutetium
 Data2: Magnesium
 Data2: Manganese
 Data2: Molybdenum
 Data2: Neodymium
 Data2: Nickel
 Data2: Niobium
 Data2: Osmium
 Data2: Palladium
 Data2: Platinum
 Data2: Potassium
 Data2: Praseodymium
 Data2: Rhenium
 Data2: Rhodium
 Data2: Rubidium
 Data2: Ruthenium
 Data2: Samarium
 Data2: Scandium
 Data2: Selenium
 Data2: Silicon
 Data2: Silver
 Data2: Sodium
 Data2: Strontium
 Data2: Sulfur
 Data2: Tantalum
 Data2: Tellurium
 Data2: Terbium
 Data2: Thallium
 Data2: Thorium
 Data2: Thulium
 Data2: Tin
 Data2: Titanium
 Data2: Tungsten
 Data2: Vanadium
 Data2: Ytterbium
 Data2: Yttrium
 Data2: Zinc
 Data2: Zirconium
 Document: The Lanthanoid Series
 Glossary: Brinell Hardness
 Glossary: Lanthanides (old name)
 Glossary: Lanthanoids
 Glossary: Moh's Scale of Hardness
 Glossary: Transition Metals
 Glossary: Vickers Hardness
 
hardware (1)
 Compounds: Titanium
 
harf (2)
 Compounds: Argon
 Data1: Argon
 
harkins (1)
 Production: Holmium
 
harm (2)
 Data1: Radium
 Data1: Sulfur
 
harmful (18)
 Allotrope: Oxygen
 Compounds: Oxygen
 Data1: Arsenic
 Data1: Cadmium
 Data1: Californium
 Data1: Gallium
 Data1: Iron
 Data1: Lead
 Data1: Potassium
 Data1: Ruthenium
 Data1: Tin
 Data1: Titanium
 Data1: Zinc
 Document: The Halogens (Group 17)
 Glossary: Alpha Decay
 Glossary: Beta Particle
 Glossary: Halogens
 Production: Polonium
 
harmless (1)
 Compounds: Calcium
 
harmonize (1)
 Biography: Julius Caesar Scaliger
 
harold (6)
 On This Day... 11 August
 On This Day... 11 July
 On This Day... 23 August
 On This Day... 26 March
 On This Day... 29 April
 On This Day... 30 January
 
harris (1)
 Data1: Rutherfordium
 
harry (1)
 On This Day... 19 January
 
hartley (1)
 Data1: Argon
 
harvard (2)
 On This Day... 12 October
 On This Day... 27 February
 
harvested (1)
 Glossary: Abundance
 
harvesting (3)
 Country: Oceans / Seas
 Data1: Manganese
 Production: Manganese
 
harvey (1)
 Data1: Mendelevium
 
hasan (1)
 Data1: Copper
 
hasn (1)
 Isotope: Ununseptium
 
haso42 (1)
 Reactions: Arsenic
 
hassias (1)
 Data1: Hassium
 
hassij (1)
 Names: Hassium
 
hassio (1)
 Names: Hassium
 
hassium (14)
 Atomic data: Hassium
 Biography: Gottfried Münzenberg
 Biography: Institute for Heavy Ion Research (GSI)
 Compounds: Hassium
 Data1: Hassium
 Data2: Hassium
 Glossary: Doubly Magic
 Isotope: Hassium
 MAC data: Hassium
 Names: Hassium
 On This Day... 14 March
 Production: Hassium
 Reactions: Hassium
 Spectrum: Hassium
 
hat (1)
 On This Day... 14 January
 
hatchet (1)
 Data1: Niobium
 
hatchett (5)
 Biography: Charles Hatchett
 Data1: Niobium
 On This Day... 2 January
 On This Day... 25 September
 On This Day... 26 November
 
hauge (1)
 Biography: Philip Hauge Abelson
 
hauptman (1)
 On This Day... 14 February
 
haven (1)
 Production: Ytterbium
 
having (25)
 Biography: Albert Ghiorso
 Biography: Emilio Gino Segre
 Biography: Joseph Louis Gay-Lussac
 Biography: Robert Wilhelm Bunsen
 Biography: Sir Humphry Davy
 Biography: Sir William Crookes
 Compounds: Dysprosium
 Compounds: Hafnium
 Compounds: Zirconium
 Data1: Carbon
 Data1: Cobalt
 Data1: Copper
 Data1: Francium
 Data1: Lutetium
 Data1: Plutonium
 Data1: Strontium
 Data1: Thulium
 Glossary: Doubly Magic
 Glossary: Magic Number
 Glossary: Molecule
 Glossary: Noble Gasses (inert gasses)
 Glossary: Thermal Conductivity
 Glossary: Viscosity
 Production: Mercury
 Production: Uranium
 
haworth (2)
 Country: United States of America
 On This Day... 19 March
 
hazard (27)
 Compounds: Magnesium
 Compounds: Samarium
 Data1: Actinium
 Data1: Cerium
 Data1: Cobalt
 Data1: Copper
 Data1: Erbium
 Data1: Europium
 Data1: Lanthanum
 Data1: Lutetium
 Data1: Magnesium
 Data1: Neodymium
 Data1: Niobium
 Data1: Nitrogen
 Data1: Phosphorus
 Data1: Radon
 Data1: Scandium
 Data1: Strontium
 Data1: Tantalum
 Data1: Thulium
 Data1: Titanium
 Data1: Uranium
 Data1: Vanadium
 Data1: Ytterbium
 Data1: Zirconium
 Isotope: Hydrogen
 Reactions: Hafnium
 
hazardous (3)
 Data1: Germanium
 Data1: Indium
 Glossary: Alpha Decay
 
hazards (88)
 Data1: Actinium
 Data1: Aluminium
 Data1: Americium
 Data1: Antimony
 Data1: Argon
 Data1: Arsenic
 Data1: Astatine
 Data1: Barium
 Data1: Berkelium
 Data1: Beryllium
 Data1: Bismuth
 Data1: Boron
 Data1: Bromine
 Data1: Cadmium
 Data1: Caesium
 Data1: Calcium
 Data1: Californium
 Data1: Cerium
 Data1: Chlorine
 Data1: Chromium
 Data1: Cobalt
 Data1: Copper
 Data1: Curium
 Data1: Dysprosium
 Data1: Einsteinium
 Data1: Erbium
 Data1: Europium
 Data1: Fluorine
 Data1: Francium
 Data1: Gadolinium
 Data1: Gallium
 Data1: Germanium
 Data1: Hafnium
 Data1: Hydrogen
 Data1: Indium
 Data1: Iodine
 Data1: Iridium
 Data1: Iron
 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: Nobelium
 Data1: Osmium
 Data1: Oxygen
 Data1: Palladium
 Data1: Phosphorus
 Data1: Plutonium
 Data1: Polonium
 Data1: Potassium
 Data1: Praseodymium
 Data1: Promethium
 Data1: Protactinium
 Data1: Radium
 Data1: Radon
 Data1: Rhodium
 Data1: Roentgenium
 Data1: Rubidium
 Data1: Ruthenium
 Data1: Scandium
 Data1: Selenium
 Data1: Silicon
 Data1: Sodium
 Data1: Strontium
 Data1: Sulfur
 Data1: Tantalum
 Data1: Tellurium
 Data1: Terbium
 Data1: Thallium
 Data1: Thulium
 Data1: Tin
 Data1: Titanium
 Data1: Tungsten
 Data1: Uranium
 Data1: Vanadium
 Data1: Xenon
 Data1: Ytterbium
 Data1: Yttrium
 Data1: Zinc
 Data1: Zirconium
 
hb+ (1)
 Equation: Base ionisation constant
 
hbo32 (1)
 Reactions: Boron
 
hbr (2)
 Data1: Hydrogen
 Document: The Halogens (Group 17)
 
hbro (1)
 Reactions: Bromine
 
hbro2 (1)
 Reactions: Bromine
 
hbro3 (1)
 Reactions: Bromine
 
hcl (23)
 Biography: Robert Wilhelm Bunsen
 Compounds: Chlorine
 Data1: Chlorine
 Data1: Hydrogen
 Data1: Manganese
 Document: The Halogens (Group 17)
 Glossary: Acid
 Glossary: Aqua regia
 Glossary: Binary compound
 Production: Magnesium
 Reactions: Aluminium
 Reactions: Bismuth
 Reactions: Boron
 Reactions: Calcium
 Reactions: Chromium
 Reactions: Gold
 Reactions: Iodine
 Reactions: Magnesium
 Reactions: Rhenium
 Reactions: Scandium
 Reactions: Strontium
 Reactions: Technetium
 Reactions: Yttrium
 
hclo (2)
 Biography: Antoine-Jerome Balard
 Reactions: Chlorine
 
hclo2 (1)
 Reactions: Chlorine
 
hcn (2)
 Data1: Polonium
 Reactions: Carbon
 
hcno (1)
 Reactions: Carbon
 
hcooh (1)
 Reactions: Carbon
 
hcro4 (1)
 Reactions: Chromium
 
hcuo2 (1)
 Reactions: Copper
 
hd (2)
 Country: Outer space
 Production: Promethium
 
he+ (1)
 Atomic data: Helium
 
he2 (1)
 Reactions: Helium
 
he2+ (2)
 Production: Helium
 Reactions: Helium
 
he2++ (1)
 Reactions: Helium
 
head (8)
 Biography: Glenn Theodore Seaborg
 Biography: Gottfried Münzenberg
 Biography: Lise Meitner
 Compounds: Neodymium
 Data1: Copper
 Data1: Rutherfordium
 Data1: Tantalum
 On This Day... 11 September
 
headache (2)
 Data1: Antimony
 Data1: Sodium
 
headaches (1)
 Compounds: Carbon
 
headed (3)
 Biography: Gottfried Münzenberg
 Data1: Einsteinium
 Production: Einsteinium
 
headlight (1)
 Data1: Rhodium
 
headphones (3)
 Compounds: Neodymium
 Data1: Neodymium
 Data1: Samarium
 
headquartered (1)
 Production: Palladium
 
heal (3)
 Data1: Magnesium
 Data1: Mercury
 Data1: Plutonium
 
healing (1)
 Compounds: Silver
 
health (21)
 Biography: Dmitriy Ivanovich Mendeleyev
 Biography: Irene Joliot-Curie
 Biography: John William Strutt Rayleigh
 Biography: Jöns Jacob Berzelius
 Biography: Michael Faraday
 Compounds: Gold
 Compounds: Manganese
 Compounds: Oxygen
 Compounds: Potassium
 Data1: Actinium
 Data1: Chromium
 Data1: Cobalt
 Data1: Fluorine
 Data1: Manganese
 Data1: Mercury
 Data1: Radium
 Data1: Radon
 Data1: Sodium
 Glossary: Fahrenheit
 Production: Fluorine
 Production: Radon
 
healthy (2)
 Data1: Calcium
 Isotope: Potassium
 
heaps (1)
 Production: Lead
 
heard (1)
 Data1: Lead
 
hearing (1)
 Data1: Titanium
 
heart (10)
 Allotrope: Carbon
 Biography: John Dalton
 Biography: Sir Humphry Davy
 Compounds: Carbon
 Compounds: Potassium
 Data1: Indium
 Data1: Potassium
 Data1: Rubidium
 Data1: Sodium
 Data1: Thallium
 
heartburn (3)
 Compounds: Bismuth
 Compounds: Magnesium
 Compounds: Sodium
 
heat (182)
 Allotrope: Arsenic
 Allotrope: Carbon
 Biography: Henry Cavendish
 Biography: Johan Gadolin
 Biography: Joseph Louis Gay-Lussac
 Biography: Robert Wilhelm Bunsen
 Biography: Sir Humphry Davy
 Biography: Sir William Crookes
 Compounds: Calcium
 Compounds: Hafnium
 Compounds: Lead
 Compounds: Lithium
 Compounds: Neodymium
 Compounds: Silicon
 Compounds: Titanium
 Data1: Aluminium
 Data1: Antimony
 Data1: Beryllium
 Data1: Boron
 Data1: Cerium
 Data1: Copper
 Data1: Gallium
 Data1: Iridium
 Data1: Lithium
 Data1: Nickel
 Data1: Niobium
 Data1: Phosphorus
 Data1: Plutonium
 Data1: Promethium
 Data1: Sodium
 Data1: Titanium
 Data1: Tungsten
 Data2: Actinium
 Data2: Aluminium
 Data2: Americium
 Data2: Antimony
 Data2: Argon
 Data2: Arsenic
 Data2: Astatine
 Data2: Barium
 Data2: Berkelium
 Data2: Beryllium
 Data2: Bismuth
 Data2: Bohrium
 Data2: Boron
 Data2: Bromine
 Data2: Cadmium
 Data2: Caesium
 Data2: Calcium
 Data2: Californium
 Data2: Carbon
 Data2: Cerium
 Data2: Chlorine
 Data2: Chromium
 Data2: Cobalt
 Data2: Copper
 Data2: Curium
 Data2: Darmstadtium
 Data2: Dubnium
 Data2: Dysprosium
 Data2: Einsteinium
 Data2: Erbium
 Data2: Europium
 Data2: Fermium
 Data2: Fluorine
 Data2: Francium
 Data2: Gadolinium
 Data2: Gallium
 Data2: Germanium
 Data2: Gold
 Data2: Hafnium
 Data2: Hassium
 Data2: Helium
 Data2: Holmium
 Data2: Hydrogen
 Data2: Indium
 Data2: Iodine
 Data2: Iridium
 Data2: Iron
 Data2: Krypton
 Data2: Lanthanum
 Data2: Lawrencium
 Data2: Lead
 Data2: Lithium
 Data2: Lutetium
 Data2: Magnesium
 Data2: Manganese
 Data2: Meitnerium
 Data2: Mendelevium
 Data2: Mercury
 Data2: Molybdenum
 Data2: Neodymium
 Data2: Neon
 Data2: Neptunium
 Data2: Nickel
 Data2: Niobium
 Data2: Nitrogen
 Data2: Nobelium
 Data2: Osmium
 Data2: Oxygen
 Data2: Palladium
 Data2: Phosphorus
 Data2: Platinum
 Data2: Plutonium
 Data2: Polonium
 Data2: Potassium
 Data2: Praseodymium
 Data2: Promethium
 Data2: Protactinium
 Data2: Radium
 Data2: Radon
 Data2: Rhenium
 Data2: Rhodium
 Data2: Roentgenium
 Data2: Rubidium
 Data2: Ruthenium
 Data2: Rutherfordium
 Data2: Samarium
 Data2: Scandium
 Data2: Seaborgium
 Data2: Selenium
 Data2: Silicon
 Data2: Silver
 Data2: Sodium
 Data2: Strontium
 Data2: Sulfur
 Data2: Tantalum
 Data2: Technetium
 Data2: Tellurium
 Data2: Terbium
 Data2: Thallium
 Data2: Thorium
 Data2: Thulium
 Data2: Tin
 Data2: Titanium
 Data2: Tungsten
 Data2: Ununbium
 Data2: Ununhexium
 Data2: Ununoctium
 Data2: Ununpentium
 Data2: Ununquadium
 Data2: Ununseptium
 Data2: Ununtrium
 Data2: Uranium
 Data2: Vanadium
 Data2: Xenon
 Data2: Ytterbium
 Data2: Yttrium
 Data2: Zinc
 Data2: Zirconium
 Document: The Alkali (Group 1) Metals
 Equation: Molar heat capacity
 Equation: Specific heat capacity to heat equation
 Glossary: Conduction
 Glossary: Convection
 Glossary: Enthalpy Change of Fusion (Heat of Fusion)
 Glossary: Enthalpy Change of Vapourisation
 Glossary: Exothermic
 Glossary: Heat Capacity
 Glossary: Specific heat
 Glossary: Temperature
 Glossary: Thermal Conductivity
 Glossary: Thermal Expansion
 Glossary: Transition Metals
 Isotope: Polonium
 Isotope: Strontium
 On This Day... 12 February
 On This Day... 15 April
 On This Day... 16 April
 On This Day... 16 February
 On This Day... 2 October
 On This Day... 20 June
 On This Day... 26 March
 On This Day... 27 March
 On This Day... 28 May
 On This Day... 8 November
 Production: Iron
 Production: Uranium
 Reactions: Calcium
 Reactions: Germanium
 Reactions: Strontium
 Reactions: Tungsten
 
heated (33)
 Allotrope: Arsenic
 Allotrope: Tin
 Biography: Ferdinand Frederic Henri Moissan
 Biography: Morris Travers
 Biography: Robert Wilhelm Bunsen
 Compounds: Thorium
 Compounds: Tin
 Data1: Boron
 Data1: Cadmium
 Data1: Hafnium
 Data1: Palladium
 Data1: Phosphorus
 Data1: Protactinium
 Data1: Rhodium
 Data1: Titanium
 Data1: Uranium
 Data1: Vanadium
 Data1: Zinc
 Data2: Indium
 Glossary: Emission Spectrum
 On This Day... 26 April
 Production: Iron
 Reactions: Antimony
 Reactions: Arsenic
 Reactions: Beryllium
 Reactions: Carbon
 Reactions: Iridium
 Reactions: Rhenium
 Reactions: Rhodium
 Reactions: Scandium
 Reactions: Technetium
 Reactions: Thallium
 Reactions: Yttrium
 
heater (1)
 Data1: Titanium
 
heaters (1)
 Data1: Molybdenum
 
heating (42)
 Allotrope: Phosphorus
 Biography: Andreas Sigismund Marggraf
 Biography: Antoine Alexandre Brutus Bussy
 Biography: Johann Schroder
 Compounds: Barium
 Compounds: Cobalt
 Compounds: Europium
 Compounds: Silicon
 Compounds: Vanadium
 Data1: Chromium
 Data1: Lanthanum
 Data1: Niobium
 Data1: Nitrogen
 Data1: Oxygen
 Data1: Silicon
 Data1: Titanium
 Data1: Uranium
 Data1: Zirconium
 Document: The Lanthanoid Series
 Equation: Boyle's Law
 Glossary: Enthalpy Change of Vapourisation
 Glossary: Heat Capacity
 Glossary: Thermal Expansion
 On This Day... 2 February
 On This Day... 24 December
 On This Day... 26 March
 Production: Astatine
 Production: Mercury
 Production: Sodium
 Reactions: Bismuth
 Reactions: Cobalt
 Reactions: Iridium
 Reactions: Iron
 Reactions: Lead
 Reactions: Osmium
 Reactions: Palladium
 Reactions: Ruthenium
 Reactions: Silicon
 Reactions: Tin
 Reactions: Titanium
 Reactions: Vanadium
 Reactions: Zinc
 
heats (6)
 Biography: Henry Cavendish
 On This Day... 12 February
 On This Day... 2 October
 On This Day... 27 March
 On This Day... 30 October
 Production: Zinc
 
heatsinks (1)
 Data1: Copper
 
heavier (18)
 Country: Outer space
 Data1: Argon
 Data1: Erbium
 Data1: Hydrogen
 Data1: Praseodymium
 Data1: Samarium
 Data1: Technetium
 Data1: Titanium
 Data1: Xenon
 Document: The Halogens (Group 17)
 Glossary: Allotrope
 Glossary: Baryon
 Glossary: Element
 Glossary: Halogens
 Isotope: Darmstadtium
 Isotope: Helium
 Isotope: Nickel
 Production: Neon
 
heavies (1)
 Production: Yttrium
 
heaviest (7)
 Country: Outer space
 Data1: Bismuth
 Data1: Mercury
 Data1: Radon
 Data1: Ununoctium
 Glossary: Island of Stability
 Isotope: Bismuth
 
heavy (45)
 Allotrope: Carbon
 Biography: Glenn Theodore Seaborg
 Biography: Gottfried Münzenberg
 Biography: Institute for Heavy Ion Research (GSI)
 Biography: Peter Armbruster
 Compounds: Tantalum
 Country: China
 Data1: Barium
 Data1: Bismuth
 Data1: Bohrium
 Data1: Cerium
 Data1: Chlorine
 Data1: Darmstadtium
 Data1: Dubnium
 Data1: Dysprosium
 Data1: Hassium
 Data1: Iron
 Data1: Lawrencium
 Data1: Manganese
 Data1: Meitnerium
 Data1: Molybdenum
 Data1: Nobelium
 Data1: Plutonium
 Data1: Technetium
 Data1: Thallium
 Data1: Tungsten
 Data1: Ununbium
 Glossary: Alpha Decay
 Glossary: Baryon
 Glossary: Heavy water (D2O)
 Glossary: Island of Stability
 Glossary: Magnetic Ordering
 Glossary: Spontaneous Fission
 Isotope: Hassium
 Isotope: Hydrogen
 On This Day... 29 April
 On This Day... 29 December
 Production: Dysprosium
 Production: Holmium
 Production: Lawrencium
 Production: Nobelium
 Production: Tellurium
 Production: Terbium
 Production: Yttrium
 Production: Zirconium
 
hebertot (1)
 Biography: Louis Nicolas Vauquelin
 
hed+ (1)
 Reactions: Helium
 
heh+ (1)
 Reactions: Helium
 
heidelberg (3)
 Biography: Dmitriy Ivanovich Mendeleyev
 Biography: Gustav Robert Kirchhoff
 Biography: Robert Wilhelm Bunsen
 
heidelburg (1)
 Biography: Robert Wilhelm Bunsen
 
height (3)
 Biography: Antoine-Laurent de Lavoisier
 Biography: Joseph Louis Gay-Lussac
 Isotope: Cobalt
 
heike (1)
 Data1: Helium
 
heil (1)
 On This Day... 6 February
 
heilbron (1)
 On This Day... 6 November
 
heinrich (9)
 Biography: Franz-Joseph Muller Freiherr von Reichenstein
 Biography: Martin Heinrich Klaproth
 Data1: Cerium
 Data1: Niobium
 Data1: Tellurium
 Data1: Titanium
 Data1: Uranium
 Data1: Zirconium
 On This Day... 2 May
 
heinz (1)
 Biography: Gottfried Münzenberg
 
heisenberg (1)
 On This Day... 5 December
 
hekla (1)
 Biography: Robert Wilhelm Bunsen
 
held (8)
 Biography: Daniel Rutherford
 Biography: Dirk Coster
 Biography: Jean Charles Galissard de Marignac
 Biography: Robert Wilhelm Bunsen
 Biography: Walter Noddack
 Compounds: Mercury
 Data1: Gallium
 Reactions: Helium
 
helen (1)
 On This Day... 26 May
 
helene (2)
 Biography: Gottfried Münzenberg
 Biography: Irene Joliot-Curie
 
helical (1)
 Allotrope: Selenium
 
helicopter (1)
 Data1: Iridium
 
helij (1)
 Names: Helium
 
helio (1)
 Names: Helium
 
heliolit (1)
 Data1: Praseodymium
 
heliolite (1)
 Data1: Praseodymium
 
helios (2)
 Biography: Pierre Jules César Janssen
 Data1: Helium
 
helium (58)
 Atomic data: Helium
 Biography: Andre Louis Debierne
 Biography: Morris Travers
 Biography: Pierre Jules César Janssen
 Biography: Robert Wilhelm Bunsen
 Biography: Sir William Ramsay
 Compounds: Barium
 Compounds: Carbon
 Compounds: Helium
 Compounds: Niobium
 Compounds: Oxygen
 Country: Algeria
 Country: Outer space
 Country: Qatar
 Country: Russia
 Country: United States of America
 Data1: Californium
 Data1: Curium
 Data1: Darmstadtium
 Data1: Helium
 Data1: Hydrogen
 Data1: Lawrencium
 Data1: Lithium
 Data1: Mendelevium
 Data1: Neon
 Data1: Polonium
 Data1: Xenon
 Data2: Helium
 Document: Abundance of the Elements in the Solar System
 Document: The Noble Gases (Group 18)
 Glossary: Alpha Decay
 Glossary: Doubly Magic
 Glossary: Molecule
 Glossary: Noble Gasses (inert gasses)
 Glossary: Periods
 Glossary: Transactinides
 Isotope: Helium
 Isotope: Hydrogen
 Isotope: Oxygen
 MAC data: Helium
 Names: Helium
 On This Day... 10 January
 On This Day... 16 November
 On This Day... 17 May
 On This Day... 23 March
 On This Day... 29 February
 On This Day... 31 August
 On This Day... 7 May
 Production: Berkelium
 Production: Californium
 Production: Carbon
 Production: Curium
 Production: Francium
 Production: Helium
 Production: Mendelevium
 Production: Neon
 Reactions: Helium
 Spectrum: Helium
 
helix (1)
 On This Day... 6 April
 
helmet (1)
 Biography: Sir Humphry Davy
 
helmholtz (1)
 Biography: Robert Wilhelm Bunsen
 
helped (14)
 Biography: Albert Ghiorso
 Biography: Antoine-Laurent de Lavoisier
 Biography: Dale R. Corson
 Biography: Dmitriy Ivanovich Mendeleyev
 Biography: Emilio Gino Segre
 Biography: Morris Travers
 Biography: Sir Humphry Davy
 Country: Outer space
 Data1: Meitnerium
 Data1: Sulfur
 Data1: Technetium
 On This Day... 21 July
 On This Day... 23 March
 Production: Chromium
 
helping (1)
 Biography: Andre Louis Debierne
 
helps (16)
 Compounds: Aluminium
 Compounds: Phosphorus
 Compounds: Sodium
 Compounds: Thorium
 Data1: Iodine
 Data1: Lanthanum
 Data1: Thorium
 Data1: Tin
 Glossary: Alloy
 Production: Iodine
 Reactions: Barium
 Reactions: Beryllium
 Reactions: Calcium
 Reactions: Magnesium
 Reactions: Radium
 Reactions: Strontium
 
helsinki (5)
 Compounds: Argon
 Compounds: Krypton
 Compounds: Xenon
 Data1: Argon
 Data1: Xenon
 
hematite (1)
 Production: Iron
 
hemisphere (3)
 Allotrope: Carbon
 Isotope: Krypton
 On This Day... 20 November
 
hemoglobin (2)
 Compounds: Iron
 Data1: Iron
 
hemoproteins (1)
 On This Day... 19 May
 
hence (13)
 Data1: Potassium
 Data1: Rubidium
 Data1: Silver
 Equation: Ideal gas law
 Glossary: Gamma Ray
 Glossary: Lanthanides (old name)
 Glossary: Lanthanoids
 Glossary: Magic Number
 Glossary: Magnetic Ordering
 Isotope: Magnesium
 Production: Plutonium
 Production: Technetium
 Production: Thorium
 
henceforth (1)
 Biography: Julius Caesar Scaliger
 
henderson (1)
 On This Day... 20 January
 
hendrik (7)
 Data1: Hafnium
 Data1: Helium
 Data1: Thorium
 Data1: Titanium
 Data1: Zirconium
 On This Day... 18 July
 On This Day... 5 July
 
hene (2)
 Data1: Neon
 Reactions: Helium
 
hene+ (1)
 Compounds: Neon
 
hening (1)
 Biography: Hennig Brand
 
hennig (2)
 Biography: Hennig Brand
 Data1: Phosphorus
 
henri (11)
 Biography: Ferdinand Frederic Henri Moissan
 Biography: Marie Curie (Marya Sklodowska)
 Biography: Pierre Curie
 Data1: Aluminium
 Data1: Fluorine
 On This Day... 1 March
 On This Day... 11 March
 On This Day... 21 July
 On This Day... 29 September
 On This Day... 4 June
 Production: Fluorine
 
henry (20)
 Biography: Henry Cavendish
 Biography: Robert Wilhelm Bunsen
 Data1: Argon
 Data1: Hafnium
 Data1: Hydrogen
 Data1: Iron
 Data1: Promethium
 Data1: Rhenium
 Data1: Technetium
 Data1: Vanadium
 Equation: Henry's Law
 On This Day... 10 June
 On This Day... 10 October
 On This Day... 12 December
 On This Day... 15 January
 On This Day... 16 June
 On This Day... 28 January
 On This Day... 4 January
 On This Day... 7 January
 On This Day... 8 October
 
henschel (1)
 Biography: Robert Wilhelm Bunsen
 
hepatic (1)
 Data1: Lanthanum
 
heptafluoride (2)
 Reactions: Iodine
 Reactions: Rhenium
 
heptafluorotantalate (1)
 Data1: Tantalum
 
heptagonal (1)
 Allotrope: Carbon
 
heptagons (1)
 Allotrope: Carbon
 
heptoxide (1)
 Reactions: Technetium
 
her (16)
 Biography: Antoine-Laurent de Lavoisier
 Biography: Dmitriy Ivanovich Mendeleyev
 Biography: Ida Eva Tacke Noddack
 Biography: Irene Joliot-Curie
 Biography: Julius Caesar Scaliger
 Biography: Lise Meitner
 Biography: Marie Curie (Marya Sklodowska)
 Biography: Pierre Curie
 Data1: Curium
 Data1: Francium
 Data1: Meitnerium
 Data1: Phosphorus
 Data1: Polonium
 Data1: Radium
 Glossary: X-Rays
 On This Day... 27 May
 
herbal (1)
 Compounds: Potassium
 
herbert (4)
 Data1: Plutonium
 On This Day... 14 February
 On This Day... 22 May
 On This Day... 9 June
 
herbicide (7)
 Compounds: Arsenic
 Compounds: Copper
 Compounds: Phosphorus
 Compounds: Potassium
 Compounds: Sodium
 Compounds: Sulfur
 Data1: Phosphorus
 
herbicides (1)
 Compounds: Sodium
 
heresy (1)
 Biography: Julius Caesar Scaliger
 
heritage (1)
 Data1: Tin
 
herman (1)
 On This Day... 3 May
 
hermann (8)
 On This Day... 16 March
 On This Day... 19 November
 On This Day... 23 January
 On This Day... 23 March
 On This Day... 25 June
 On This Day... 29 August
 On This Day... 30 October
 On This Day... 4 February
 
heroult (1)
 Production: Aluminium
 
herreshoff (1)
 On This Day... 7 February
 
herrick (1)
 On This Day... 29 March
 
herschel (1)
 Data1: Uranium
 
herty (1)
 On This Day... 4 December
 
hertzian (1)
 Glossary: Radiation
 
herzegovina (1)
 Country: Bosnia and Herzegovina
 
hesperus (1)
 Data1: Phosphorus
 
hess (1)
 Data1: Hassium
 
hesse (1)
 Data1: Hassium
 
heterosphere (1)
 Production: Helium
 
heterostructure (2)
 Compounds: Aluminium
 Compounds: Indium
 
heterostructures (1)
 Compounds: Zinc
 
hevesey (1)
 Biography: Dirk Coster
 
hevesy (3)
 Biography: George Charles de Hevesy
 Data1: Hafnium
 On This Day... 1 August
 
hewitt (1)
 On This Day... 17 September
 
hexa (1)
 Data1: Carbon
 
hexaboride (1)
 Data1: Lanthanum
 
hexafluoride (7)
 Biography: Philip Hauge Abelson
 Compounds: Xenon
 Data1: Fluorine
 Production: Fluorine
 Reactions: Osmium
 Reactions: Sulfur
 Reactions: Uranium
 
hexafluoroplatinate (1)
 Compounds: Xenon
 
hexagon (1)
 Data2: Cadmium
 
hexagonal (36)
 Allotrope: Arsenic
 Allotrope: Carbon
 Compounds: Hafnium
 Data1: Beryllium
 Data2: Americium
 Data2: Berkelium
 Data2: Beryllium
 Data2: Californium
 Data2: Carbon
 Data2: Cerium
 Data2: Cobalt
 Data2: Curium
 Data2: Dysprosium
 Data2: Erbium
 Data2: Gadolinium
 Data2: Hafnium
 Data2: Hydrogen
 Data2: Lanthanum
 Data2: Lutetium
 Data2: Magnesium
 Data2: Neodymium
 Data2: Nitrogen
 Data2: Osmium
 Data2: Praseodymium
 Data2: Rhenium
 Data2: Ruthenium
 Data2: Scandium
 Data2: Technetium
 Data2: Terbium
 Data2: Thallium
 Data2: Thulium
 Data2: Titanium
 Data2: Yttrium
 Data2: Zinc
 Data2: Zirconium
 Glossary: Allotrope
 
hexahydrate (1)
 Production: Chlorine
 
hexaoxide (2)
 Reactions: Arsenic
 Reactions: Phosphorus
 
hexavalent (1)
 Data1: Chromium
 
hexium (1)
 Isotope: Hydrogen
 
heyden (1)
 On This Day... 5 March
 
hf (23)
 Atomic data: Hafnium
 Compounds: Fluorine
 Data1: Fluorine
 Data1: Hafnium
 Data1: Scandium
 Document: The Halogens (Group 17)
 Isotope: Hafnium
 Isotope: Lutetium
 Isotope: Tantalum
 Isotope: Tungsten
 On This Day... 4 June
 Production: Hafnium
 Reactions: Boron
 Reactions: Fluorine
 Reactions: Hafnium
 Reactions: Hydrogen
 Reactions: Niobium
 Reactions: Rhenium
 Reactions: Silicon
 Reactions: Technetium
 Reactions: Titanium
 Reactions: Zirconium
 Spectrum: Hafnium
 
hf+ (1)
 Atomic data: Hafnium
 
hf+1 (1)
 Data2: Hafnium
 
hf+2 (1)
 Data2: Hafnium
 
hf+3 (1)
 Data2: Hafnium
 
hf+4 (1)
 Data2: Hafnium
 
hf4+ (1)
 Reactions: Hafnium
 
hfb2 (1)
 Compounds: Hafnium
 
hfbr4 (1)
 Reactions: Hafnium
 
hfcl4 (1)
 Reactions: Hafnium
 
hfeo2 (1)
 Reactions: Iron
 
hff4 (1)
 Reactions: Hafnium
 
hfi4 (1)
 Reactions: Hafnium
 
hfo (1)
 Reactions: Hafnium
 
hfo2 (2)
 Compounds: Hafnium
 Reactions: Hafnium
 
hfo2+ (1)
 Reactions: Hafnium
 
hg (12)
 Atomic data: Mercury
 Compounds: Mercury
 Data1: Mercury
 Glossary: Fahrenheit
 Isotope: Gold
 Isotope: Lead
 Isotope: Mercury
 Isotope: Thallium
 Production: Mercury
 Reactions: Mercury
 Reactions: Phosphorus
 Spectrum: Mercury
 
hg+ (1)
 Atomic data: Mercury
 
hg+1 (1)
 Data2: Mercury
 
hg+2 (1)
 Data2: Mercury
 
hg2 (1)
 Reactions: Mercury
 
hg2+ (1)
 Reactions: Mercury
 
hg22+ (1)
 Reactions: Mercury
 
hg2br2 (1)
 Reactions: Mercury
 
hg2c2o4 (1)
 Reactions: Mercury
 
hg2cl2 (1)
 Reactions: Mercury
 
hg2i2 (1)
 Reactions: Mercury
 
hg2so4 (1)
 Reactions: Mercury
 
hg3s2cl2 (1)
 Data1: Mercury
 
hgbr2 (1)
 Reactions: Mercury
 
hgcdte (1)
 Data1: Cadmium
 
hgcl2 (1)
 Reactions: Mercury
 
hgf2 (1)
 Reactions: Mercury
 
hghe (1)
 Reactions: Helium
 
hghe10 (1)
 Reactions: Helium
 
hgi2 (1)
 Reactions: Mercury
 
hgo (3)
 Data1: Magnesium
 On This Day... 26 April
 Reactions: Mercury
 
hgs (4)
 Data1: Mercury
 Data1: Sulfur
 Production: Mercury
 Reactions: Mercury
 
hgsb4s8 (1)
 Data1: Mercury
 
hgso4 (1)
 Compounds: Mercury
 
hgznte (1)
 Compounds: Zinc
 
hhef (1)
 Reactions: Helium
 
hidden (4)
 Biography: Carl Gustav Mosander
 Data1: Krypton
 Data1: Lanthanum
 Glossary: Spontaneous Fission
 
hide (1)
 Compounds: Calcium
 
hidrogenio (1)
 Names: Hydrogen
 
hidrogeno (1)
 Names: Hydrogen
 
hierachal (1)
 Biography: Jöns Jacob Berzelius
 
hieroglyphs (1)
 Data1: Gold
 
hieronymous (2)
 Biography: Hieronymous Theodor Richter
 Data1: Indium
 
hieronymus (2)
 Biography: Ferdinand Reich
 On This Day... 21 November
 
hierro (1)
 Names: Iron
 
higgins (1)
 Data1: Fermium
 
high (156)
 Allotrope: Boron
 Allotrope: Carbon
 Allotrope: Oxygen
 Allotrope: Phosphorus
 Allotrope: Ytterbium
 Biography: Jöns Jacob Berzelius
 Biography: Julius Caesar Scaliger
 Biography: Marie Curie (Marya Sklodowska)
 Biography: Morris Travers
 Biography: Robert Wilhelm Bunsen
 Compounds: Aluminium
 Compounds: Barium
 Compounds: Beryllium
 Compounds: Bismuth
 Compounds: Boron
 Compounds: Carbon
 Compounds: Chromium
 Compounds: Copper
 Compounds: Dysprosium
 Compounds: Fluorine
 Compounds: Hafnium
 Compounds: Indium
 Compounds: Iodine
 Compounds: Iridium
 Compounds: Lithium
 Compounds: Lutetium
 Compounds: Magnesium
 Compounds: Neodymium
 Compounds: Osmium
 Compounds: Rhenium
 Compounds: Silicon
 Compounds: Sodium
 Compounds: Strontium
 Compounds: Tantalum
 Compounds: Terbium
 Compounds: Thallium
 Compounds: Thorium
 Compounds: Titanium
 Compounds: Vanadium
 Compounds: Yttrium
 Compounds: Zirconium
 Country: Australia
 Country: Canada
 Country: China
 Country: Madagascar
 Country: Norway
 Country: Outer space
 Country: Russia
 Data1: Aluminium
 Data1: Argon
 Data1: Barium
 Data1: Beryllium
 Data1: Boron
 Data1: Bromine
 Data1: Copper
 Data1: Einsteinium
 Data1: Germanium
 Data1: Gold
 Data1: Helium
 Data1: Holmium
 Data1: Indium
 Data1: Iridium
 Data1: Lanthanum
 Data1: Lead
 Data1: Lithium
 Data1: Manganese
 Data1: Molybdenum
 Data1: Neodymium
 Data1: Niobium
 Data1: Nitrogen
 Data1: Osmium
 Data1: Phosphorus
 Data1: Praseodymium
 Data1: Promethium
 Data1: Protactinium
 Data1: Radon
 Data1: Rhenium
 Data1: Rhodium
 Data1: Ruthenium
 Data1: Rutherfordium
 Data1: Scandium
 Data1: Sodium
 Data1: Strontium
 Data1: Sulfur
 Data1: Tantalum
 Data1: Thallium
 Data1: Thorium
 Data1: Thulium
 Data1: Titanium
 Data1: Tungsten
 Data1: Uranium
 Data1: Xenon
 Data1: Yttrium
 Data1: Zinc
 Data1: Zirconium
 Data2: Chromium
 Data2: Cobalt
 Data2: Iron
 Data2: Manganese
 Data2: Nickel
 Document: The Alkali (Group 1) Metals
 Document: The Lanthanoid Series
 Document: The Transition Metals (Groups 3 to 12)
 Equation: Ideal gas law
 Glossary: Alkali Metal
 Glossary: Cosmogenic isotope
 Glossary: Double Electron Capture
 Glossary: Electrical Resistivity
 Glossary: Gamma Ray
 Glossary: Halogens
 Glossary: Lanthanides (old name)
 Glossary: Lanthanoids
 Glossary: Magic Number
 Glossary: Metals
 Glossary: Neutrino
 Glossary: Noble Gasses (inert gasses)
 Glossary: Non-Metals
 Glossary: Refractory
 Glossary: Solid
 Glossary: Transition Metals
 Isotope: Cobalt
 On This Day... 21 April
 On This Day... 26 February
 On This Day... 3 October
 On This Day... 31 January
 On This Day... 9 December
 Production: Aluminium
 Production: Americium
 Production: Boron
 Production: Dysprosium
 Production: Einsteinium
 Production: Erbium
 Production: Gallium
 Production: Germanium
 Production: Gold
 Production: Helium
 Production: Hydrogen
 Production: Indium
 Production: Magnesium
 Production: Manganese
 Production: Mercury
 Production: Plutonium
 Production: Polonium
 Production: Radon
 Production: Rhenium
 Production: Technetium
 Production: Terbium
 Production: Titanium
 Production: Uranium
 Production: Yttrium
 Production: Zinc
 Production: Zirconium
 Reactions: Carbon
 Reactions: Francium
 Reactions: Molybdenum
 Reactions: Protactinium
 
higher (41)
 Allotrope: Phosphorus
 Biography: Ida Eva Tacke Noddack
 Biography: Robert Wilhelm Bunsen
 Compounds: Arsenic
 Compounds: Gallium
 Compounds: Germanium
 Compounds: Phosphorus
 Compounds: Sodium
 Country: Oceans / Seas
 Country: Outer space
 Data1: Barium
 Data1: Chromium
 Data1: Copper
 Data1: Germanium
 Data1: Gold
 Data1: Indium
 Data1: Manganese
 Data1: Molybdenum
 Data1: Niobium
 Data1: Plutonium
 Data1: Rhodium
 Data1: Rubidium
 Data1: Xenon
 Glossary: Alkali Metal (alkaline-earth metals)
 Glossary: Double Beta Decay
 Glossary: Emission Spectrum
 Glossary: Magic Number
 Glossary: pH
 Glossary: Temperature
 Glossary: Viscosity
 Glossary: X-Rays
 Isotope: Krypton
 Production: Chlorine
 Production: Plutonium
 Production: Radon
 Production: Uranium
 Production: Yttrium
 Production: Zinc
 Reactions: Boron
 Reactions: Nickel
 Reactions: Uranium
 
highest (14)
 Allotrope: Carbon
 Biography: Jöns Jacob Berzelius
 Biography: Julius Caesar Scaliger
 Compounds: Lithium
 Compounds: Oxygen
 Data1: Neodymium
 Data1: Osmium
 Data1: Rubidium
 Data1: Samarium
 Data1: Tellurium
 Data1: Thorium
 Document: The Alkali (Group 1) Metals
 Production: Radon
 Production: Uranium
 
highlight (1)
 Data1: Polonium
 
highly (111)
 Allotrope: Carbon
 Biography: Louis Nicolas Vauquelin
 Biography: Robert Wilhelm Bunsen
 Compounds: Actinium
 Compounds: Antimony
 Compounds: Arsenic
 Compounds: Astatine
 Compounds: Barium
 Compounds: Berkelium
 Compounds: Bohrium
 Compounds: Cadmium
 Compounds: Californium
 Compounds: Chlorine
 Compounds: Chromium
 Compounds: Curium
 Compounds: Darmstadtium
 Compounds: Dubnium
 Compounds: Einsteinium
 Compounds: Fermium
 Compounds: Fluorine
 Compounds: Francium
 Compounds: Gallium
 Compounds: Hassium
 Compounds: Iodine
 Compounds: Iron
 Compounds: Lawrencium
 Compounds: Lead
 Compounds: Meitnerium
 Compounds: Mendelevium
 Compounds: Mercury
 Compounds: Neptunium
 Compounds: Nitrogen
 Compounds: Nobelium
 Compounds: Phosphorus
 Compounds: Plutonium
 Compounds: Polonium
 Compounds: Protactinium
 Compounds: Roentgenium
 Compounds: Rutherfordium
 Compounds: Seaborgium
 Compounds: Silver
 Compounds: Sodium
 Compounds: Sulfur
 Compounds: Ununbium
 Compounds: Ununhexium
 Compounds: Ununoctium
 Compounds: Ununpentium
 Compounds: Ununquadium
 Compounds: Ununseptium
 Compounds: Ununtrium
 Compounds: Uranium
 Compounds: Xenon
 Compounds: Zinc
 Compounds: Zirconium
 Data1: Astatine
 Data1: Beryllium
 Data1: Bismuth
 Data1: Boron
 Data1: Bromine
 Data1: Cadmium
 Data1: Caesium
 Data1: Cerium
 Data1: Cobalt
 Data1: Gadolinium
 Data1: Gold
 Data1: Holmium
 Data1: Hydrogen
 Data1: Indium
 Data1: Iridium
 Data1: Lead
 Data1: Magnesium
 Data1: Mercury
 Data1: Niobium
 Data1: Nitrogen
 Data1: Oxygen
 Data1: Phosphorus
 Data1: Polonium
 Data1: Protactinium
 Data1: Radium
 Data1: Radon
 Data1: Rhodium
 Data1: Ruthenium
 Data1: Scandium
 Data1: Silicon
 Data1: Sodium
 Data1: Terbium
 Data1: Thallium
 Data1: Tin
 Data1: Vanadium
 Data1: Ytterbium
 Data1: Yttrium
 Data2: Hydrogen
 Document: The Actinoid Series
 Document: The Alkali (Group 1) Metals
 Document: The Halogens (Group 17)
 Glossary: Atomic Charge
 Glossary: Group
 Glossary: Halogens
 Glossary: Thermal Conductivity
 Isotope: Barium
 Isotope: Dubnium
 Isotope: Francium
 Isotope: Helium
 Isotope: Hydrogen
 Isotope: Rutherfordium
 Production: Boron
 Production: Erbium
 Production: Technetium
 Reactions: Iridium
 Reactions: Osmium
 Reactions: Rhodium
 
higinbotham (1)
 On This Day... 25 October
 
higly (1)
 Glossary: Aqua regia
 
hilac (4)
 Data1: Lawrencium
 Data1: Nobelium
 Production: Lawrencium
 Production: Nobelium
 
hildebrand (1)
 On This Day... 16 November
 
hillebrand (1)
 Data1: Helium
 
hills (2)
 Allotrope: Carbon
 Data1: Gold
 
him (34)
 Biography: (Gabriel) Daniel Fahrenheit
 Biography: Antoine-Laurent de Lavoisier
 Biography: Dmitriy Ivanovich Mendeleyev
 Biography: Emilio Gino Segre
 Biography: Enrico Fermi
 Biography: Henry Cavendish
 Biography: Johan Gadolin
 Biography: Johann August Arfvedson
 Biography: Jöns Jacob Berzelius
 Biography: Joseph Louis Gay-Lussac
 Biography: Joseph Priestley
 Biography: Julius Caesar Scaliger
 Biography: Louis Jacques Thenard
 Biography: Michael Faraday
 Biography: Pierre Curie
 Biography: Pierre Jules César Janssen
 Biography: Robert Wilhelm Bunsen
 Biography: Sir William Crookes
 Biography: Smithson Tennant
 Biography: William Hyde Wollaston
 Compounds: Nitrogen
 Data1: Europium
 Data1: Fluorine
 Data1: Lutetium
 Data1: Mercury
 Data1: Tantalum
 Data1: Technetium
 Data1: Vanadium
 On This Day... 11 February
 On This Day... 24 December
 On This Day... 26 March
 On This Day... 27 March
 On This Day... 28 February
 Production: Fluorine
 
himself (18)
 Biography: Ferdinand Reich
 Biography: John William Strutt Rayleigh
 Biography: Jöns Jacob Berzelius
 Biography: Joseph Louis Gay-Lussac
 Biography: Joseph Priestley
 Biography: Julius Caesar Scaliger
 Biography: Karl Wilhelm Scheele
 Biography: Louis Jacques Thenard
 Biography: Michael Faraday
 Biography: Robert Wilhelm Bunsen
 Biography: Smithson Tennant
 Biography: William Hyde Wollaston
 Compounds: Nitrogen
 Data1: Fluorine
 Data1: Gallium
 Data1: Lanthanum
 Data1: Vanadium
 Production: Fluorine
 
hindenburg (2)
 Country: United States of America
 Data1: Hydrogen
 
hindus (1)
 Data1: Mercury
 
hinshelwood (1)
 On This Day... 19 June
 
hint (1)
 Data1: Praseodymium
 
hio (1)
 Reactions: Iodine
 
hio3 (2)
 Compounds: Iodine
 Reactions: Iodine
 
hio4 (1)
 Reactions: Iodine
 
hio52 (1)
 Reactions: Iodine
 
hip (1)
 Data1: Titanium
 
hippel (1)
 On This Day... 19 November
 
hippocrates (1)
 Biography: Julius Caesar Scaliger
 
hippolyte (1)
 Data1: Vanadium
 
hiroshima (1)
 Data1: Plutonium
 
hirsch (1)
 Data1: Fermium
 
hisinger (2)
 Biography: Wilhelm von Hisinger
 Data1: Cerium
 
histoire (1)
 Biography: Ferdinand Frederic Henri Moissan
 
historian (2)
 On This Day... 20 June
 On This Day... 30 October
 
historians (1)
 Biography: Michael Faraday
 
historic (1)
 Data1: Plutonium
 
historical (7)
 Biography: Julius Caesar Scaliger
 Country: United Kingdom
 Data1: Cerium
 Data1: Helium
 Data1: Ruthenium
 Isotope: Beryllium
 Production: Rhodium
 
historically (12)
 Biography: Ida Eva Tacke Noddack
 Compounds: Iron
 Country: India
 Data1: Caesium
 Data1: Gold
 Data1: Praseodymium
 Data1: Rubidium
 Data1: Selenium
 Data1: Sodium
 Glossary: Magnetic Ordering
 Production: Erbium
 Production: Lanthanum
 
histories (2)
 Biography: Antoine-Laurent de Lavoisier
 Data1: Copper
 
history (128)
 Biography: Emilio Gino Segre
 Biography: Jöns Jacob Berzelius
 Biography: Joseph Priestley
 Biography: Julius Caesar Scaliger
 Biography: Michael Faraday
 Biography: Robert Wilhelm Bunsen
 Country: Canada
 Country: Outer space
 Data1: Actinium
 Data1: Aluminium
 Data1: Americium
 Data1: Antimony
 Data1: Argon
 Data1: Arsenic
 Data1: Astatine
 Data1: Barium
 Data1: Berkelium
 Data1: Beryllium
 Data1: Bismuth
 Data1: Bohrium
 Data1: Boron
 Data1: Bromine
 Data1: Cadmium
 Data1: Caesium
 Data1: Calcium
 Data1: Californium
 Data1: Carbon
 Data1: Cerium
 Data1: Chlorine
 Data1: Chromium
 Data1: Cobalt
 Data1: Copper
 Data1: Curium
 Data1: Darmstadtium
 Data1: Dubnium
 Data1: Dysprosium
 Data1: Einsteinium
 Data1: Erbium
 Data1: Europium
 Data1: Fermium
 Data1: Fluorine
 Data1: Francium
 Data1: Gadolinium
 Data1: Gallium
 Data1: Germanium
 Data1: Gold
 Data1: Hafnium
 Data1: Hassium
 Data1: Helium
 Data1: Holmium
 Data1: Hydrogen
 Data1: Indium
 Data1: Iodine
 Data1: Iridium
 Data1: Iron
 Data1: Krypton
 Data1: Lanthanum
 Data1: Lawrencium
 Data1: Lead
 Data1: Lithium
 Data1: Lutetium
 Data1: Magnesium
 Data1: Manganese
 Data1: Meitnerium
 Data1: Mendelevium
 Data1: Mercury
 Data1: Molybdenum
 Data1: Neodymium
 Data1: Neon
 Data1: Neptunium
 Data1: Nickel
 Data1: Niobium
 Data1: Nobelium
 Data1: Osmium
 Data1: Oxygen
 Data1: Palladium
 Data1: Phosphorus
 Data1: Platinum
 Data1: Plutonium
 Data1: Polonium
 Data1: Potassium
 Data1: Praseodymium
 Data1: Promethium
 Data1: Protactinium
 Data1: Radium
 Data1: Radon
 Data1: Rhenium
 Data1: Rhodium
 Data1: Roentgenium
 Data1: Rubidium
 Data1: Ruthenium
 Data1: Rutherfordium
 Data1: Samarium
 Data1: Scandium
 Data1: Seaborgium
 Data1: Selenium
 Data1: Silicon
 Data1: Silver
 Data1: Sodium
 Data1: Strontium
 Data1: Sulfur
 Data1: Tantalum
 Data1: Technetium
 Data1: Tellurium
 Data1: Terbium
 Data1: Thallium
 Data1: Thorium
 Data1: Thulium
 Data1: Tin
 Data1: Titanium
 Data1: Tungsten
 Data1: Ununbium
 Data1: Ununhexium
 Data1: Ununoctium
 Data1: Ununpentium
 Data1: Ununquadium
 Data1: Uranium
 Data1: Vanadium
 Data1: Xenon
 Data1: Ytterbium
 Data1: Yttrium
 Data1: Zinc
 Data1: Zirconium
 Isotope: Magnesium
 On This Day... 11 January
 On This Day... 23 May
 On This Day... 28 January
 Production: Nickel
 
hitchcock (1)
 On This Day... 18 March
 
hitherto (1)
 Biography: Robert Wilhelm Bunsen
 
hitler (1)
 Biography: Lise Meitner
 
hittorf (1)
 On This Day... 27 March
 
hjelm (1)
 Data1: Molybdenum
 
hkrcch (1)
 Compounds: Krypton
 
hkrcn (1)
 Compounds: Krypton
 
hler (9)
 Biography: Antoine Alexandre Brutus Bussy
 Biography: Friedrich Wöhler
 Biography: Robert Wilhelm Bunsen
 Data1: Aluminium
 Data1: Beryllium
 Data1: Vanadium
 Data1: Yttrium
 On This Day... 22 February
 On This Day... 31 July
 
hlin (1)
 Names: Aluminium
 
hmno2 (1)
 Reactions: Manganese
 
hmoo4 (1)
 Reactions: Molybdenum
 
hn3 (1)
 Data2: Cadmium
 
hnio2 (1)
 Reactions: Nickel
 
hno2 (1)
 Reactions: Nitrogen
 
hno3 (14)
 Compounds: Nitrogen
 Data1: Scandium
 Data2: Fluorine
 Data2: Uranium
 Glossary: Acid
 Glossary: Aqua regia
 Reactions: Boron
 Reactions: Gold
 Reactions: Iodine
 Reactions: Iron
 Reactions: Niobium
 Reactions: Rhenium
 Reactions: Technetium
 Reactions: Zinc
 
ho (6)
 Atomic data: Holmium
 Data1: Holmium
 Isotope: Erbium
 Isotope: Holmium
 Reactions: Holmium
 Spectrum: Holmium
 
ho+ (1)
 Atomic data: Holmium
 
ho+3 (1)
 Data2: Holmium
 
ho2 (2)
 Reactions: Hydrogen
 Reactions: Oxygen
 
ho2o3 (3)
 Compounds: Dysprosium
 Compounds: Holmium
 Reactions: Holmium
 
ho3+ (1)
 Reactions: Holmium
 
hobbyists (1)
 Compounds: Neodymium
 
hobr3 (1)
 Reactions: Holmium
 
hochschule (1)
 Biography: Walter Noddack
 
hocl3 (1)
 Reactions: Holmium
 
hodgkin (1)
 On This Day... 12 May
 
hof3 (1)
 Reactions: Holmium
 
hoff (4)
 Equation: Osmotic pressure
 Equation: van't Hoff equation
 On This Day... 14 October
 On This Day... 5 September
 
hoffman (1)
 On This Day... 10 August
 
hoffmann (1)
 On This Day... 18 July
 
hofmann (4)
 Biography: Gottfried Münzenberg
 Biography: Sir William Crookes
 Data1: Darmstadtium
 On This Day... 8 April
 
hohenheim (1)
 Data1: Hydrogen
 
hoi3 (1)
 Reactions: Holmium
 
hold (8)
 Country: Oceans / Seas
 Data1: Gallium
 Data1: Promethium
 Document: Understanding Electron Configuration Tables
 Glossary: Energy Levels
 Glossary: Magnetic Ordering
 Glossary: Noble Gasses (inert gasses)
 Production: Gold
 
holders (1)
 Production: Technetium
 
holding (3)
 Biography: Joseph Louis Gay-Lussac
 Compounds: Iodine
 Compounds: Nitrogen
 
holds (2)
 Allotrope: Carbon
 Glossary: Enthalpy Change of Fusion (Heat of Fusion)
 
holdup (1)
 Production: Radon
 
hole (1)
 Data1: Fluorine
 
hollow (1)
 Allotrope: Carbon
 
holmia (3)
 Compounds: Holmium
 Data1: Holmium
 Data1: Thulium
 
holmij (1)
 Names: Holmium
 
holmio (1)
 Names: Holmium
 
holmium (21)
 Atomic data: Holmium
 Biography: Jacques-Louis Soret
 Biography: Per Teodor Cleve
 Compounds: Dysprosium
 Compounds: Holmium
 Country: China
 Data1: Dysprosium
 Data1: Holmium
 Data1: Thulium
 Data2: Holmium
 Document: Abundance of the Elements in the Solar System
 Document: The Lanthanoid Series
 Glossary: Rare Earth Elements
 Isotope: Holmium
 MAC data: Holmium
 Names: Holmium
 Production: Dysprosium
 Production: Holmium
 Reactions: Einsteinium
 Reactions: Holmium
 Spectrum: Holmium
 
holy (1)
 Biography: Julius Caesar Scaliger
 
holzminden (1)
 Biography: Robert Wilhelm Bunsen
 
homage (2)
 Data1: Francium
 Data1: Gold
 
home (9)
 Biography: John William Strutt Rayleigh
 Biography: Sir Humphry Davy
 Compounds: Holmium
 Compounds: Sulfur
 Data1: Berkelium
 Data1: Dubnium
 Data1: Hafnium
 Data1: Holmium
 On This Day... 23 February
 
homebrewing (1)
 Compounds: Sodium
 
homeowner (1)
 Data1: Radon
 
homer (1)
 Data1: Sulfur
 
homes (4)
 Biography: Irene Joliot-Curie
 Compounds: Samarium
 Data1: Radon
 Production: Radon
 
homing (1)
 Compounds: Indium
 
homogeneous (1)
 Data1: Thulium
 
honduras (1)
 Country: Honduras
 
honor (9)
 Biography: John William Strutt Rayleigh
 Country: Canada
 Data1: Bohrium
 Data1: Dubnium
 Data1: Lutetium
 Data1: Meitnerium
 Data1: Rutherfordium
 Data1: Seaborgium
 On This Day... 18 February
 
honorable (1)
 Biography: Jöns Jacob Berzelius
 
honored (1)
 Biography: Dmitriy Ivanovich Mendeleyev
 
honoring (1)
 Data1: Bohrium
 
honors (2)
 Biography: Robert Wilhelm Bunsen
 Biography: Sir Humphry Davy
 
honour (6)
 Biography: Glenn Theodore Seaborg
 Biography: John William Strutt Rayleigh
 Data1: Curium
 Data1: Roentgenium
 Data1: Ruthenium
 Data1: Rutherfordium
 
honoured (1)
 Production: Aluminium
 
honours (3)
 Biography: Julius Caesar Scaliger
 Data1: Darmstadtium
 Data1: Rhodium
 
hooke (2)
 Glossary: Shear Modulus
 On This Day... 12 July
 
hope (5)
 Biography: Daniel Rutherford
 Biography: Jöns Jacob Berzelius
 Data1: Carbon
 Data1: Polonium
 Data1: Strontium
 
hoped (1)
 Data1: Scandium
 
hopfner (1)
 Compounds: Cobalt
 
horace (1)
 On This Day... 11 December
 
horc (1)
 Names: Magnesium
 
horizontal (1)
 Production: Zinc
 
hormone (1)
 Compounds: Iodine
 
hormones (3)
 Compounds: Iodine
 Data1: Iodine
 Document: The Halogens (Group 17)
 
horn (1)
 Production: Silver
 
hornblende (1)
 Production: Silicon
 
horrific (1)
 Data1: Phosphorus
 
horse (1)
 Biography: Pierre Curie
 
horseshoe (1)
 Glossary: Magnetic Ordering
 
horsley (1)
 Biography: Joseph Priestley
 
horticulture (1)
 Compounds: Iron
 
hoso5 (1)
 Reactions: Osmium
 
hospital (4)
 Biography: Irene Joliot-Curie
 Data1: Plutonium
 On This Day... 16 October
 Production: Technetium
 
hospitals (2)
 Biography: Irene Joliot-Curie
 Data1: Copper
 
host (1)
 Glossary: Goldschmidt Classification
 
hosted (1)
 Biography: Antoine-Laurent de Lavoisier
 
hot (50)
 Allotrope: Sulfur
 Biography: Ferdinand Frederic Henri Moissan
 Biography: Philip Hauge Abelson
 Biography: Robert Wilhelm Bunsen
 Compounds: Hafnium
 Compounds: Indium
 Compounds: Nitrogen
 Compounds: Silicon
 Data1: Lanthanum
 Data1: Radon
 Data1: Sulfur
 Data1: Titanium
 Document: The Alkaline Earth Metals (Group 2)
 Glossary: Alkali Metal (alkaline-earth metals)
 Glossary: Temperature
 On This Day... 31 December
 Production: Mercury
 Production: Radon
 Production: Sulfur
 Production: Uranium
 Reactions: Antimony
 Reactions: Bismuth
 Reactions: Bromine
 Reactions: Carbon
 Reactions: Cerium
 Reactions: Chlorine
 Reactions: Cobalt
 Reactions: Copper
 Reactions: Dysprosium
 Reactions: Erbium
 Reactions: Europium
 Reactions: Gadolinium
 Reactions: Hafnium
 Reactions: Holmium
 Reactions: Iodine
 Reactions: Lanthanum
 Reactions: Lutetium
 Reactions: Neodymium
 Reactions: Potassium
 Reactions: Praseodymium
 Reactions: Samarium
 Reactions: Silver
 Reactions: Sodium
 Reactions: Sulfur
 Reactions: Terbium
 Reactions: Thulium
 Reactions: Titanium
 Reactions: Tungsten
 Reactions: Ytterbium
 Reactions: Zirconium
 
hotter (3)
 Biography: Sir William Crookes
 Glossary: Temperature
 Production: Zinc
 
hour (2)
 Data1: Nickel
 Reactions: Calcium
 
hours (32)
 Biography: Robert Wilhelm Bunsen
 Data1: Americium
 Data1: Astatine
 Data1: Berkelium
 Data1: Einsteinium
 Data1: Mendelevium
 Isotope: Actinium
 Isotope: Astatine
 Isotope: Dubnium
 Isotope: Erbium
 Isotope: Fermium
 Isotope: Iridium
 Isotope: Krypton
 Isotope: Lawrencium
 Isotope: Mendelevium
 Isotope: Mercury
 Isotope: Molybdenum
 Isotope: Platinum
 Isotope: Praseodymium
 Isotope: Radon
 Isotope: Rhodium
 Isotope: Rutherfordium
 Isotope: Scandium
 Isotope: Tantalum
 Isotope: Technetium
 Isotope: Xenon
 Isotope: Ytterbium
 Isotope: Zirconium
 Production: Aluminium
 Production: Astatine
 Production: Berkelium
 Production: Technetium
 
house (8)
 Biography: Glenn Theodore Seaborg
 Biography: Joseph Louis Gay-Lussac
 Biography: Joseph Priestley
 Biography: Julius Caesar Scaliger
 Compounds: Sodium
 Data1: Cerium
 Data1: Radon
 Production: Radon
 
houseboat (1)
 Biography: John William Strutt Rayleigh
 
household (3)
 Compounds: Chlorine
 Compounds: Sodium
 Data1: Sodium
 
houses (1)
 Production: Radon
 
houston (1)
 Data1: Yttrium
 
howell (1)
 On This Day... 22 June
 
however (104)
 Allotrope: Carbon
 Allotrope: Tin
 Biography: Emilio Gino Segre
 Biography: Ferdinand Frederic Henri Moissan
 Biography: Franz-Joseph Muller Freiherr von Reichenstein
 Biography: Georges Urbain
 Biography: Hennig Brand
 Biography: Ida Eva Tacke Noddack
 Biography: John Dalton
 Biography: Jöns Jacob Berzelius
 Biography: Pierre Curie
 Biography: Robert Wilhelm Bunsen
 Compounds: Chromium
 Compounds: Copper
 Compounds: Iodine
 Compounds: Krypton
 Compounds: Neon
 Compounds: Nitrogen
 Compounds: Samarium
 Compounds: Silver
 Compounds: Sodium
 Compounds: Zinc
 Country: Outer space
 Data1: Aluminium
 Data1: Argon
 Data1: Bismuth
 Data1: Boron
 Data1: Bromine
 Data1: Californium
 Data1: Curium
 Data1: Dubnium
 Data1: Dysprosium
 Data1: Einsteinium
 Data1: Erbium
 Data1: Europium
 Data1: Fermium
 Data1: Francium
 Data1: Gallium
 Data1: Gold
 Data1: Helium
 Data1: Indium
 Data1: Iodine
 Data1: Magnesium
 Data1: Meitnerium
 Data1: Neodymium
 Data1: Nickel
 Data1: Niobium
 Data1: Nobelium
 Data1: Potassium
 Data1: Praseodymium
 Data1: Promethium
 Data1: Rhenium
 Data1: Rubidium
 Data1: Ruthenium
 Data1: Rutherfordium
 Data1: Samarium
 Data1: Sodium
 Data1: Tin
 Data1: Xenon
 Data1: Zinc
 Glossary: Alloy
 Glossary: Alpha Decay
 Glossary: Antimatter
 Glossary: Beta Particle
 Glossary: Double Electron Capture
 Glossary: Electron Capture
 Glossary: Electronegativity
 Glossary: Emission Spectrum
 Glossary: Enthalpy Change of Fusion (Heat of Fusion)
 Glossary: Group
 Glossary: Magnetic Ordering
 Glossary: Metalloids
 Glossary: Noble Gasses (inert gasses)
 Glossary: pH
 Glossary: Spontaneous Fission
 Glossary: Thermal Conductivity
 Isotope: Bismuth
 Isotope: Strontium
 Production: Boron
 Production: Einsteinium
 Production: Europium
 Production: Gold
 Production: Holmium
 Production: Hydrogen
 Production: Iodine
 Production: Lead
 Production: Mercury
 Production: Palladium
 Production: Phosphorus
 Production: Plutonium
 Production: Radon
 Production: Sulfur
 Production: Technetium
 Production: Terbium
 Reactions: Cobalt
 Reactions: Hafnium
 Reactions: Iodine
 Reactions: Iron
 Reactions: Magnesium
 Reactions: Oxygen
 Reactions: Rhenium
 Reactions: Rubidium
 Reactions: Titanium
 Reactions: Zirconium
 
hoyuk (1)
 Data1: Copper
 
hpbo2 (1)
 Reactions: Lead
 
hpo32 (1)
 Reactions: Phosphorus
 
hpo4 (1)
 Data1: Sodium
 
hpo42 (1)
 Reactions: Phosphorus
 
hr (2)
 Country: Outer space
 Production: Promethium
 
hreo4 (1)
 Reactions: Rhenium
 
hromium (1)
 Reactions: Chromium
 
hrsi (1)
 Compounds: Silicon
 
hs (4)
 Data1: Hassium
 Glossary: Doubly Magic
 Isotope: Hassium
 Reactions: Sulfur
 
hs+3 (1)
 Data2: Hassium
 
hsbo2 (1)
 Reactions: Antimony
 
hse (1)
 Reactions: Selenium
 
hseo3 (1)
 Reactions: Selenium
 
hseo4 (1)
 Reactions: Selenium
 
hsio3 (1)
 Reactions: Silicon
 
hsno2 (1)
 Reactions: Tin
 
hso3 (1)
 Reactions: Sulfur
 
hso4 (1)
 Reactions: Sulfur
 
ht (2)
 Biography: Henry Cavendish
 Biography: Otto Hahn
 
htco4 (1)
 Reactions: Technetium
 
hteo2+ (1)
 Reactions: Tellurium
 
hteo3 (1)
 Reactions: Tellurium
 
hteo4 (1)
 Reactions: Tellurium
 
htio2 (1)
 Reactions: Titanium
 
huancavelica (2)
 Country: Peru
 Production: Mercury
 
huang (1)
 Data1: Mercury
 
hubble (1)
 Allotrope: Sulfur
 
hubnerite (1)
 Production: Tungsten
 
hudor (1)
 Data1: Hydrogen
 
huebnerite (1)
 Data1: Tungsten
 
hues (1)
 Compounds: Cobalt
 
huet (1)
 Biography: Julius Caesar Scaliger
 
hugo (1)
 On This Day... 6 July
 
huizenga (1)
 Data1: Fermium
 
hulet (1)
 Data1: Seaborgium
 
human (62)
 Allotrope: Carbon
 Biography: (Gabriel) Daniel Fahrenheit
 Biography: Hennig Brand
 Compounds: Iodine
 Compounds: Oxygen
 Compounds: Sodium
 Data1: Aluminium
 Data1: Arsenic
 Data1: Barium
 Data1: Beryllium
 Data1: Boron
 Data1: Bromine
 Data1: Cadmium
 Data1: Caesium
 Data1: Calcium
 Data1: Carbon
 Data1: Chlorine
 Data1: Chromium
 Data1: Cobalt
 Data1: Copper
 Data1: Erbium
 Data1: Fluorine
 Data1: Gold
 Data1: Hydrogen
 Data1: Iodine
 Data1: Iron
 Data1: Lead
 Data1: Lithium
 Data1: Lutetium
 Data1: Magnesium
 Data1: Manganese
 Data1: Molybdenum
 Data1: Nickel
 Data1: Nitrogen
 Data1: Oxygen
 Data1: Phosphorus
 Data1: Plutonium
 Data1: Potassium
 Data1: Radium
 Data1: Rhodium
 Data1: Rubidium
 Data1: Ruthenium
 Data1: Selenium
 Data1: Silicon
 Data1: Sodium
 Data1: Strontium
 Data1: Sulfur
 Data1: Tellurium
 Data1: Thallium
 Data1: Tin
 Data1: Titanium
 Data1: Uranium
 Data1: Vanadium
 Data1: Zinc
 Data1: Zirconium
 Document: Chemical makeup of the human body
 Glossary: Alpha Decay
 Isotope: Potassium
 Isotope: Sodium
 Isotope: Technetium
 Production: Tantalum
 Production: Titanium
 
humanism (1)
 Biography: Julius Caesar Scaliger
 
humanist (1)
 Data1: Platinum
 
humankind (1)
 Allotrope: Carbon
 
humans (19)
 Compounds: Cadmium
 Compounds: Cobalt
 Compounds: Nitrogen
 Compounds: Sodium
 Compounds: Zinc
 Data1: Cobalt
 Data1: Copper
 Data1: Gold
 Data1: Holmium
 Data1: Iodine
 Data1: Lead
 Data1: Manganese
 Data1: Molybdenum
 Data1: Rhodium
 Data1: Selenium
 Data1: Tellurium
 Data1: Tin
 Document: The Halogens (Group 17)
 Production: Oxygen
 
humble (2)
 Biography: Louis Jacques Thenard
 Biography: Robert Wilhelm Bunsen
 
humboldt (1)
 Data1: Vanadium
 
humid (2)
 Allotrope: Arsenic
 Glossary: Pyrophoric
 
humidity (1)
 Glossary: Desiccant
 
humphrey (7)
 Biography: Adair Crawford
 Data1: Barium
 Data1: Calcium
 Data1: Cerium
 Data1: Magnesium
 Data1: Potassium
 Data1: Sodium
 
humphry (22)
 Biography: Bernard Courtois
 Biography: Michael Faraday
 Biography: Sir Humphry Davy
 Compounds: Nitrogen
 Data1: Aluminium
 Data1: Barium
 Data1: Boron
 Data1: Chlorine
 Data1: Fluorine
 Data1: Iodine
 Data1: Lithium
 Data1: Magnesium
 Data1: Potassium
 Data1: Silicon
 Data1: Sodium
 Data1: Strontium
 Data1: Technetium
 On This Day... 15 November
 On This Day... 16 April
 On This Day... 17 December
 On This Day... 6 October
 Production: Fluorine
 
hund (1)
 On This Day... 4 February
 
hundred (7)
 Biography: Julius Caesar Scaliger
 Biography: Philip Hauge Abelson
 Biography: Robert Wilhelm Bunsen
 Data1: Praseodymium
 Data1: Titanium
 Glossary: pH
 Production: Helium
 
hundreds (2)
 Data1: Zinc
 Production: Uranium
 
hungarian (3)
 Biography: George Charles de Hevesy
 Data1: Tellurium
 On This Day... 1 August
 
hungary (10)
 Country: China
 Country: Germany
 Country: Hungary
 Country: Japan
 Country: Kazakhstan
 Country: Slovakia
 Country: Ukraine
 Country: United Kingdom
 Country: United States of America
 Data1: Titanium
 
hungry (1)
 Compounds: Magnesium
 
hunter (1)
 Data1: Titanium
 
husband (9)
 Biography: Antoine-Laurent de Lavoisier
 Biography: Ida Eva Tacke Noddack
 Biography: Irene Joliot-Curie
 Biography: Pierre Curie
 Data1: Curium
 Data1: Phosphorus
 Data1: Polonium
 Data1: Radium
 On This Day... 27 May
 
hutchinsonite (2)
 Data1: Thallium
 Production: Thallium
 
huygens (2)
 Country: Outer space
 Data1: Argon
 
hv (1)
 Glossary: Vickers Hardness
 
hxecch (2)
 Compounds: Xenon
 Data1: Xenon
 
hxeh (1)
 Compounds: Xenon
 
hxeoh (2)
 Compounds: Xenon
 Data1: Xenon
 
hyacinth (1)
 Data1: Zirconium
 
hyde (5)
 Biography: William Hyde Wollaston
 Data1: Osmium
 Data1: Palladium
 Data1: Rhodium
 On This Day... 6 August
 
hydor (1)
 Data1: Mercury
 
hydrargyros (1)
 Data1: Mercury
 
hydrargyrum (2)
 Data1: Mercury
 Names: Mercury
 
hydrate (5)
 Biography: Michael Faraday
 Biography: Robert Wilhelm Bunsen
 Compounds: Neon
 Compounds: Xenon
 Data1: Neon
 
hydrated (5)
 Data1: Bromine
 Data1: Magnesium
 Data1: Sodium
 Production: Caesium
 Reactions: Iron
 
hydration (1)
 On This Day... 28 May
 
hydrazine (1)
 Data2: Platinum
 
hydrazines (1)
 On This Day... 27 May
 
hydrazoic (1)
 Data2: Cadmium
 
hydride (7)
 Compounds: Krypton
 Compounds: Lithium
 Compounds: Xenon
 Data1: Germanium
 Data1: Xenon
 Glossary: Alkali Metal
 Reactions: Uranium
 
hydrides (2)
 Compounds: Hydrogen
 Production: Tellurium
 
hydrocarbon (2)
 Data1: Carbon
 Data1: Sodium
 
hydrocarbons (11)
 Compounds: Carbon
 Compounds: Hydrogen
 Data1: Bromine
 Data2: Aluminium
 Data2: Beryllium
 On This Day... 22 May
 On This Day... 26 November
 On This Day... 6 February
 On This Day... 9 November
 Production: Carbon
 Production: Hydrogen
 
hydrochloric (30)
 Compounds: Chlorine
 Compounds: Nitrogen
 Compounds: Sulfur
 Compounds: Tin
 Data1: Chlorine
 Data1: Chromium
 Data1: Iridium
 Data1: Manganese
 Data1: Rhenium
 Glossary: Acid
 Glossary: Aqua regia
 Production: Magnesium
 Reactions: Aluminium
 Reactions: Antimony
 Reactions: Beryllium
 Reactions: Bismuth
 Reactions: Boron
 Reactions: Calcium
 Reactions: Chromium
 Reactions: Gold
 Reactions: Iridium
 Reactions: Lead
 Reactions: Polonium
 Reactions: Rhenium
 Reactions: Scandium
 Reactions: Strontium
 Reactions: Technetium
 Reactions: Thallium
 Reactions: Titanium
 Reactions: Yttrium
 
hydrocracking (1)
 Data1: Hydrogen
 
hydrocyanic (1)
 Data1: Polonium
 
hydroden (1)
 Reactions: Aluminium
 
hydrodesulfurization (1)
 Production: Sulfur
 
hydrofining (1)
 Data1: Hydrogen
 
hydrofluoric (14)
 Biography: Ferdinand Frederic Henri Moissan
 Compounds: Fluorine
 Data1: Fluorine
 Data1: Tantalum
 Production: Fluorine
 Reactions: Boron
 Reactions: Hafnium
 Reactions: Niobium
 Reactions: Rhenium
 Reactions: Silicon
 Reactions: Tantalum
 Reactions: Technetium
 Reactions: Titanium
 Reactions: Zirconium
 
hydrofluoride (2)
 Compounds: Argon
 Data1: Argon
 
hydrofluorination (1)
 Reactions: Uranium
 
hydroforming (1)
 Data1: Hydrogen
 
hydrogen (151)
 Allotrope: Arsenic
 Atomic data: Hydrogen
 Biography: Enrico Fermi
 Biography: Henry Cavendish
 Biography: Jean Charles Galissard de Marignac
 Biography: John Dalton
 Biography: Joseph Louis Gay-Lussac
 Biography: Louis Jacques Thenard
 Biography: Michael Faraday
 Biography: Philip Hauge Abelson
 Biography: Pierre Jules César Janssen
 Biography: Robert Wilhelm Bunsen
 Compounds: Argon
 Compounds: Barium
 Compounds: Boron
 Compounds: Carbon
 Compounds: Chlorine
 Compounds: Copper
 Compounds: Europium
 Compounds: Hydrogen
 Compounds: Lithium
 Compounds: Oxygen
 Compounds: Silver
 Compounds: Sodium
 Country: Outer space
 Country: United States of America
 Data1: Argon
 Data1: Boron
 Data1: Calcium
 Data1: Carbon
 Data1: Einsteinium
 Data1: Fermium
 Data1: Fluorine
 Data1: Helium
 Data1: Hydrogen
 Data1: Lanthanum
 Data1: Lithium
 Data1: Neon
 Data1: Niobium
 Data1: Oxygen
 Data1: Palladium
 Data1: Phosphorus
 Data1: Radium
 Data1: Rhodium
 Data1: Sodium
 Data1: Sulfur
 Data1: Technetium
 Data1: Titanium
 Data1: Vanadium
 Data2: Bromine
 Data2: Chlorine
 Data2: Chromium
 Data2: Hydrogen
 Data2: Lead
 Data2: Platinum
 Data2: Silver
 Document: Abundance of the Elements in the Solar System
 Document: Chemical makeup of the human body
 Document: The Actinoid Series
 Document: The Alkali (Group 1) Metals
 Document: The Halogens (Group 17)
 Document: The Lanthanoid Series
 Document: The Noble Gases (Group 18)
 Equation: pH defined
 Glossary: Alkali Metal
 Glossary: Atom
 Glossary: Heavy water (D2O)
 Glossary: Mole
 Glossary: Molecule
 Glossary: Noble Gasses (inert gasses)
 Glossary: Nucleus
 Glossary: Organic chemistry
 Glossary: Oxidation State
 Glossary: Periods
 Glossary: pH
 Glossary: The Pauling Scale
 Glossary: Transactinides
 Isotope: Hydrogen
 Isotope: Lithium
 Isotope: Oxygen
 MAC data: Hydrogen
 Names: Hydrogen
 On This Day... 12 February
 On This Day... 16 December
 On This Day... 20 September
 On This Day... 21 September
 On This Day... 22 April
 On This Day... 26 May
 On This Day... 29 January
 On This Day... 31 January
 On This Day... 4 May
 On This Day... 9 December
 On This Day... 9 January
 Production: Arsenic
 Production: Boron
 Production: Carbon
 Production: Chlorine
 Production: Einsteinium
 Production: Fermium
 Production: Helium
 Production: Hydrogen
 Production: Neon
 Production: Oxygen
 Production: Rhenium
 Production: Ruthenium
 Production: Tellurium
 Production: Tungsten
 Production: Zinc
 Reactions: Aluminium
 Reactions: Barium
 Reactions: Beryllium
 Reactions: Cadmium
 Reactions: Caesium
 Reactions: Calcium
 Reactions: Carbon
 Reactions: Cerium
 Reactions: Chromium
 Reactions: Cobalt
 Reactions: Copper
 Reactions: Dysprosium
 Reactions: Erbium
 Reactions: Europium
 Reactions: Gadolinium
 Reactions: Holmium
 Reactions: Hydrogen
 Reactions: Iron
 Reactions: Lanthanum
 Reactions: Lithium
 Reactions: Lutetium
 Reactions: Magnesium
 Reactions: Manganese
 Reactions: Neodymium
 Reactions: Nickel
 Reactions: Potassium
 Reactions: Praseodymium
 Reactions: Promethium
 Reactions: Radium
 Reactions: Rubidium
 Reactions: Samarium
 Reactions: Scandium
 Reactions: Sodium
 Reactions: Strontium
 Reactions: Terbium
 Reactions: Thulium
 Reactions: Tin
 Reactions: Titanium
 Reactions: Uranium
 Reactions: Ytterbium
 Reactions: Yttrium
 Reactions: Zinc
 Spectrum: Hydrogen
 
hydrogenases (1)
 Production: Hydrogen
 
hydrogenating (1)
 Data1: Lithium
 
hydrogenation (3)
 Data1: Hydrogen
 Data1: Lutetium
 On This Day... 1 June
 
hydrogene (2)
 Glossary: pH
 Names: Hydrogen
 
hydrogenii (1)
 Glossary: pH
 
hydrogenium (1)
 Names: Hydrogen
 
hydrogens (1)
 Data1: Carbon
 
hydrohalic (1)
 Document: The Halogens (Group 17)
 
hydrokryptoacetylene (1)
 Compounds: Krypton
 
hydrolysis (2)
 On This Day... 6 April
 Production: Gallium
 
hydrolyzed (1)
 Compounds: Chlorine
 
hydrolyzes (1)
 Glossary: Base
 
hydrometallurgical (1)
 Production: Zinc
 
hydrometallurgy (1)
 Production: Zinc
 
hydronium (3)
 Equation: Acid dissociation constant
 Equation: Base ionisation constant
 Glossary: Base
 
hydrophobic (1)
 Compounds: Zinc
 
hydroquinone (1)
 On This Day... 24 July
 
hydrothermal (1)
 Production: Sulfur
 
hydrous (2)
 Compounds: Cobalt
 Production: Nickel
 
hydroxenoacetylene (2)
 Compounds: Xenon
 Data1: Xenon
 
hydroxide (59)
 Compounds: Aluminium
 Compounds: Lithium
 Compounds: Magnesium
 Compounds: Nickel
 Compounds: Potassium
 Compounds: Xenon
 Compounds: Zinc
 Compounds: Zirconium
 Data1: Calcium
 Data1: Curium
 Data1: Gallium
 Data1: Palladium
 Data1: Rhodium
 Data1: Thallium
 Data1: Uranium
 Data1: Xenon
 Document: The Alkali (Group 1) Metals
 Equation: Base ionisation constant
 Glossary: Deliquescent
 Glossary: pH
 Production: Chlorine
 Production: Curium
 Production: Gallium
 Production: Potassium
 Production: Sodium
 Production: Thorium
 Reactions: Aluminium
 Reactions: Barium
 Reactions: Beryllium
 Reactions: Caesium
 Reactions: Calcium
 Reactions: Cerium
 Reactions: Dysprosium
 Reactions: Erbium
 Reactions: Europium
 Reactions: Fluorine
 Reactions: Gadolinium
 Reactions: Holmium
 Reactions: Lanthanum
 Reactions: Lithium
 Reactions: Lutetium
 Reactions: Magnesium
 Reactions: Neodymium
 Reactions: Nickel
 Reactions: Potassium
 Reactions: Praseodymium
 Reactions: Radium
 Reactions: Rubidium
 Reactions: Samarium
 Reactions: Silicon
 Reactions: Sodium
 Reactions: Strontium
 Reactions: Sulfur
 Reactions: Terbium
 Reactions: Thallium
 Reactions: Thulium
 Reactions: Tungsten
 Reactions: Ytterbium
 Reactions: Zinc
 
hydroxides (6)
 Allotrope: Phosphorus
 Document: The Alkali (Group 1) Metals
 Document: The Alkaline Earth Metals (Group 2)
 Glossary: Alkali Metal
 Glossary: Alkali Metal (alkaline-earth metals)
 Glossary: Metals
 
hydroxy (1)
 Data1: Zinc
 
hydroxyl (1)
 Data1: Oxygen
 
hydroxylapatite (1)
 Compounds: Calcium
 
hydroxylbastnasite (1)
 Production: Cerium
 
hygroscopic (7)
 Compounds: Bromine
 Compounds: Calcium
 Compounds: Dysprosium
 Compounds: Lithium
 Glossary: Deliquescent
 Glossary: Desiccant
 Glossary: Hygroscopic
 
hypercalcemia (1)
 Compounds: Phosphorus
 
hyperons (1)
 Glossary: Baryon
 
hyperphosphatemia (1)
 Compounds: Lanthanum
 
hypersensitivity (1)
 Compounds: Potassium
 
hypertension (1)
 Compounds: Copper
 
hyperthyroidism (1)
 Compounds: Iodine
 
hypervelocity (1)
 Compounds: Hafnium
 
hypo (1)
 Compounds: Sodium
 
hypoallergenic (1)
 Data1: Tungsten
 
hypobromite (1)
 Reactions: Bromine
 
hypochlorite (5)
 Compounds: Boron
 Compounds: Calcium
 Compounds: Chlorine
 Compounds: Sodium
 Reactions: Chlorine
 
hypodermic (1)
 Data1: Iridium
 
hypoiolite (1)
 Reactions: Iodine
 
hypotheses (1)
 Biography: Joseph Louis Gay-Lussac
 
hypothesis (5)
 Biography: Ida Eva Tacke Noddack
 Biography: Jean Charles Galissard de Marignac
 Biography: Jöns Jacob Berzelius
 Glossary: Island of Stability
 On This Day... 13 July
 
hypothesize (1)
 Compounds: Sodium
 
hypothesized (3)
 Compounds: Sodium
 Data1: Tungsten
 Glossary: Electron Capture
 
hypothetical (2)
 Data1: Gallium
 Glossary: Oxidation State
 
hypothyroidism (1)
 Compounds: Iodine
 
hzno2 (1)
 Reactions: Zinc
 
hzro3 (1)
 Reactions: Zirconium