HHomeBackground Color:He
LiBeBlack White GrayBCNOFNe
NaMgAlSiPSClAr
KCaScTiVCrMnFeCoNiCuZnGaGeAsSeBrKr
RbSrYZrNbMoTcRuRhPdAgCdInSnSbTeIXe
CsBaLaCePrNdPmSmEuGdTbDyHoErTmYbLuHfTaWReOsIrPtAuHgTlPbBiPoAtRn
FrRaAcThPaUNpPuAmCmBkCfEsFmMdNoLrRfDbSgBhHsMtDsRgUubUutUuqUupUuhUusUuo

Atomic Weight of the elements

Text lists sorted by: Value | Atomic Number | Alphabetical
Plots: 3D Live | Shaded | Ball | Crossed Line | Scatter | Sorted Scatter
Log scale plots: 3D Live | Shaded | Ball | Crossed Line | Scatter | Sorted Scatter
Good for this property: Scatter

Hydrogen1.00794 Niobium92.90638 Thallium204.3833
Helium4.002602 Molybdenum95.94 Lead207.2
Lithium6.941 Technetium98[note] Bismuth208.98038
Beryllium9.012182 Ruthenium101.07 Polonium209[note]
Boron10.811 Rhodium102.9055 Astatine210[note]
Carbon12.0107 Palladium106.42 Radon222[note]
Nitrogen14.0067 Silver107.8682 Francium223[note]
Oxygen15.9994 Cadmium112.411 Radium226[note]
Fluorine18.9984032 Indium114.818 Actinium227[note]
Neon20.1797 Tin118.71 Thorium232.0381
Sodium22.98977 Antimony121.76 Protactinium231.03588
Magnesium24.305 Tellurium127.6 Uranium238.02891
Aluminum26.981538 Iodine126.90447 Neptunium237[note]
Silicon28.0855 Xenon131.293 Plutonium244[note]
Phosphorus30.973761 Cesium132.90545 Americium243[note]
Sulfur32.065 Barium137.327 Curium247[note]
Chlorine35.453 Lanthanum138.9055 Berkelium247[note]
Argon39.948 Cerium140.116 Californium251[note]
Potassium39.0983 Praseodymium140.90765 Einsteinium252[note]
Calcium40.078 Neodymium144.24 Fermium257[note]
Scandium44.95591 Promethium145[note] Mendelevium258[note]
Titanium47.867 Samarium150.36 Nobelium259[note]
Vanadium50.9415 Europium151.964 Lawrencium262[note]
Chromium51.9961 Gadolinium157.25 Rutherfordium261[note]
Manganese54.938049 Terbium158.92534 Dubnium262[note]
Iron55.845 Dysprosium162.5 Seaborgium266[note]
Cobalt58.9332 Holmium164.93032 Bohrium264[note]
Nickel58.6934 Erbium167.259 Hassium277[note]
Copper63.546 Thulium168.93421 Meitnerium268[note]
Zinc65.409 Ytterbium173.04 Darmstadtium281[note]
Gallium69.723 Lutetium174.967 Roentgenium272[note]
Germanium72.64 Hafnium178.49 Ununbium285[note]
Arsenic74.9216 Tantalum180.9479 Ununtrium284[note]
Selenium78.96 Tungsten183.84 Ununquadium289[note]
Bromine79.904 Rhenium186.207 Ununpentium288[note]
Krypton83.798 Osmium190.23 Ununhexium292[note]
Rubidium85.4678 Iridium192.217 UnunseptiumN/A
Strontium87.62 Platinum195.078 Ununoctium294[note]
Yttrium88.90585 Gold196.96655
Zirconium91.224 Mercury200.59


Notes on the Atomic Weight of particular elements:

Technetium: Atomic mass number given for longest lived isotope.

Promethium: Atomic mass number given for longest lived isotope.

Polonium: Atomic mass number given for longest lived isotope.

Astatine: Atomic mass number given for longest lived isotope.

Radon: Atomic mass number given for longest lived isotope.

Francium: Atomic mass number given for longest lived isotope.

Radium: Atomic mass number given for longest lived isotope.

Actinium: Atomic mass number given for longest lived isotope.

Neptunium: Atomic mass number given for longest lived isotope.

Plutonium: Atomic mass number given for longest lived isotope.

Americium: Atomic mass number given for longest lived isotope.

Curium: Atomic mass number given for longest lived isotope.

Berkelium: Atomic mass number given for longest lived isotope.

Californium: Atomic mass number given for longest lived isotope.

Einsteinium: Atomic mass number given for longest lived isotope.

Fermium: Atomic mass number given for longest lived isotope.

Mendelevium: Atomic mass number given for longest lived isotope.

Nobelium: Atomic mass number given for longest lived isotope.

Lawrencium: Atomic mass number given for longest lived isotope.

Rutherfordium: Atomic mass number given for longest lived isotope.

Dubnium: Atomic mass number given for longest lived isotope.

Seaborgium: Atomic mass number given for longest lived isotope.

Bohrium: Atomic mass number given for longest lived isotope.

Hassium: Atomic mass number given for longest lived isotope.

Meitnerium: Atomic mass number given for longest lived isotope.

Darmstadtium: Atomic mass number given for longest lived isotope.

111: Atomic mass number given for longest lived isotope.

112: Atomic mass number given for longest lived isotope.

113: Atomic mass number given for longest lived isotope.

114: Atomic mass number given for longest lived isotope.

115: Atomic mass number given for longest lived isotope.

116: Atomic mass number given for longest lived isotope.

118: Atomic mass number given for longest lived isotope.

Up to date, curated data provided by Mathematica's ElementData function from Wolfram Research, Inc.

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Absolute Boiling Point Isotope Abundances
Absolute Melting Point Known Isotopes
Abundance in Earth's Crust Lattice Angles
Abundance in Humans Lattice Constants
Abundance in Meteorites Lifetime
Abundance in the Ocean Liquid Density
Abundance in the Sun Magnetic Type
Abundance in the Universe Mass Magnetic Susceptibility
Adiabatic Index Melting Point
Allotrope Names Memberships
Alternate Names Mohs Hardness
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Autoignition Point Neel Point
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Density Refractive Index
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Heat of Combustion Van Der Waals Radius
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Ionization Energies Young Modulus