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
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