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 Protactinium231.03588
Sodium22.98977 Antimony121.76 Thorium232.0381
Magnesium24.305 Iodine126.90447 Neptunium237[note]
Aluminum26.981538 Tellurium127.6 Uranium238.02891
Silicon28.0855 Xenon131.293 Americium243[note]
Phosphorus30.973761 Cesium132.90545 Plutonium244[note]
Sulfur32.065 Barium137.327 Curium247[note]
Chlorine35.453 Lanthanum138.9055 Berkelium247[note]
Potassium39.0983 Cerium140.116 Californium251[note]
Argon39.948 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 Rutherfordium261[note]
Chromium51.9961 Gadolinium157.25 Lawrencium262[note]
Manganese54.938049 Terbium158.92534 Dubnium262[note]
Iron55.845 Dysprosium162.5 Bohrium264[note]
Nickel58.6934 Holmium164.93032 Seaborgium266[note]
Cobalt58.9332 Erbium167.259 Meitnerium268[note]
Copper63.546 Thulium168.93421 Roentgenium272[note]
Zinc65.409 Ytterbium173.04 Hassium277[note]
Gallium69.723 Lutetium174.967 Darmstadtium281[note]
Germanium72.64 Hafnium178.49 Ununtrium284[note]
Arsenic74.9216 Tantalum180.9479 Ununbium285[note]
Selenium78.96 Tungsten183.84 Ununpentium288[note]
Bromine79.904 Rhenium186.207 Ununquadium289[note]
Krypton83.798 Osmium190.23 Ununhexium292[note]
Rubidium85.4678 Iridium192.217 Ununoctium294[note]
Strontium87.62 Platinum195.078 UnunseptiumN/A
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
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Abundance in the Universe Mass Magnetic Susceptibility
Adiabatic Index Melting Point
Allotrope Names Memberships
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Ionization Energies Young Modulus