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.

The Elements book Mad Science book Periodic Table Poster  Click here to buy a book, photographic periodic table poster, card deck, or 3D print based on the images you see here!
 
Common Properties
Abundance in Earth's Crust Discovery Year
Abundance in Humans Electrical Conductivity
Abundance in Meteorites Electron Affinity
Abundance in the Ocean Electron Configuration
Abundance in the Sun Electronegativity
Abundance in the Universe Half Life
Atomic Mass Heat of Fusion
Atomic Number Heat of Vaporization
Atomic Radius Ionization Energies
Boiling Point Melting Point
Covalent Radius Specific Heat
Density
 
Other Properties
Adiabatic Index Mohs Hardness
Allotrope Names Molar Magnetic Susceptibility
Alternate Names Molar Volume
Block Neutron Cross Section
Brinell Hardness Neutron Mass Absorption
Bulk Modulus NFPA Label
CAS Number Period
CID Number Phase
Color Poisson Ratio
Critical Pressure Quantum Numbers
Critical Temperature Radioactive
Crystal Structure Refractive Index
Curie Point Resistivity
Decay Mode RTECS Number
DOT Hazard Class Series
DOT Numbers Shear Modulus
Electrical Type Space Group Name
Gas Atomic Multiplicities Space Group Number
Group Speed of Sound
Isotope Abundances Superconducting Point
Isotopes (All Known) Symbol
Isotopes (Stable) Thermal Conductivity
Lattice Angles Thermal Expansion
Lattice Constants Valence
Lifetime Van Der Waals Radius
Liquid Density Vickers Hardness
Magnetic Type Volume Magnetic Susceptibility
Mass Magnetic Susceptibility Young Modulus
Memberships