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

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


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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Electrical Conductivity Shear Modulus
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Heat of Combustion Van Der Waals Radius
Heat of Fusion Vickers Hardness
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Ionization Energies Young Modulus