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

Atomic Mass of the elements

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

Actinium227[note] Hafnium178.49 Praseodymium140.90766
Aluminum26.9815385 Hassium270[note] Promethium145
Americium243[note] Helium4.002602 Protactinium231.03588[note]
Antimony121.76 Holmium164.93033 Radium226[note]
Argon39.948 Hydrogen1.008 Radon222[note]
Arsenic74.921595 Indium114.818 Rhenium186.207
Astatine210[note] Iodine126.90447 Rhodium102.9055
Barium137.327 Iridium192.217 Roentgenium281[note]
Berkelium247[note] Iron55.845 Rubidium85.4678
Beryllium9.0121831 Krypton83.798 Ruthenium101.07
Bismuth208.9804 Lanthanum138.90547 Rutherfordium267[note]
Bohrium270[note] Lawrencium262[note] Samarium150.36
Boron10.81 Lead207.2 Scandium44.955908
Bromine79.904 Lithium6.94 Seaborgium269[note]
Cadmium112.414 Livermorium293[note] Selenium78.971
Calcium40.078 Lutetium174.9668 Silicon28.085
Californium251[note] Magnesium24.305 Silver107.8682
Carbon12.011 Manganese54.938044 Sodium22.98976928
Cerium140.116 Meitnerium278[note] Strontium87.62
Cesium132.90545196 Mendelevium258[note] Sulfur32.06
Chlorine35.45 Mercury200.592 Tantalum180.94788
Chromium51.9961 Molybdenum95.95 Technetium97[note]
Cobalt58.933194 Moscovium289[note] Tellurium127.6
Copernicium285[note] Neodymium144.242 Tennessine293[note]
Copper63.546 Neon20.1797 Terbium158.92535
Curium247[note] Neptunium237[note] Thallium204.38
Darmstadtium281[note] Nickel58.6934 Thorium232.0377
Dubnium270[note] Nihonium286[note] Thulium168.93422
Dysprosium162.5 Niobium92.90637 Tin118.71
Einsteinium252[note] Nitrogen14.007 Titanium47.867
Erbium167.259 Nobelium259[note] Tungsten183.84
Europium151.964 Oganesson294[note] Uranium238.02891
Fermium257[note] Osmium190.23 Vanadium50.9415
Flerovium289[note] Oxygen15.999 Xenon131.293
Fluorine18.998403163 Palladium106.42 Ytterbium173.045
Francium223[note] Phosphorus30.973761998 Yttrium88.90584
Gadolinium157.25 Platinum195.084 Zinc65.38
Gallium69.723 Plutonium244[note] Zirconium91.224
Germanium72.63 Polonium209[note]
Gold196.966569 Potassium39.0983


Notes on the Atomic Mass of particular elements:

Technetium: 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.

Protactinium: 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.

Roentgenium: Atomic mass number given for longest lived isotope.

Copernicium: Atomic mass number given for longest lived isotope.

Nihonium: Atomic mass number given for longest lived isotope.

Flerovium: Atomic mass number given for longest lived isotope.

Moscovium: Atomic mass number given for longest lived isotope.

Livermorium: Atomic mass number given for longest lived isotope.

Tennessine: Atomic mass number given for longest lived isotope.

Oganesson: 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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Common Properties
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Abundance in Meteorites Electron Affinity
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Abundance in the Universe Half Life
Atomic Mass Heat of Fusion
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CAS Number Period
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Color Poisson Ratio
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Critical Temperature Radioactive
Crystal Structure Refractive Index
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