1H2He3Li4Be5B6C7N8O9F10Ne11Na12Mg13Al14Si15P16S17Cl18Ar19K20Ca21Sc22Ti23V24Cr25Mn26Fe27Co28Ni29Cu30Zn31Ga32Ge33As34Se35Br36Kr37Rb38Sr39Y40Zr41Nb42Mo43Tc44Ru45Rh46Pd47Ag48Cd49In50Sn51Sb52Te53I54Xe55Cs56BaLa*Lanthanides57La58Ce59Pr60Nd61Pm62Sm63Eu64Gd65Tb66Dy67Ho68Er69Tm70Yb71Lu72Hf73Ta74W75Re76Os77Ir78Pt79Au80Hg81Tl82Pb83Bi84Po85At86Rn87Fr88RaAc*Actinides89Ac90Th91Pa92U93Np94Pu95Am96Cm97Bk98Cf99Es100Fm101Md102No103Lr104Rf105Db106Sg107Bh108Hs109Mt110Ds111Rg112Cn113Nh114Fl115Mc116Lv117Ts118Og
Atomic mass
Mass of an atom of a chemical element in u, the atomic mass unit. The atomic mass is slightly less than the sum of the masses of its protons, neutrons and electrons due to the mass loss of binding energy.
| Element | Atomic mass | ||
|---|---|---|---|
| 1H | Hydrogen | 1.008 u | |
| 2He | Helium | 4.002 u | |
| 3Li | Lithium | 6.946 u | |
| 4Be | Beryllium | 9.012 u | |
| 5B | Boron | 10.81 u | |
| 6C | Carbon | 12.01 u | |
| 7N | Nitrogen | 14 u | |
| 8O | Oxygen | 15.99 u | |
| 9F | Fluorine | 18.99 u | |
| 10Ne | Neon | 20.17 u | |
| 11Na | Sodium | 22.98 u | |
| 12Mg | Magnesium | 24.3 u | |
| 13Al | Aluminum | 26.98 u | |
| 14Si | Silicon | 28.08 u | |
| 15P | Phosphorus | 30.97 u | |
| 16S | Sulfur | 32.06 u | |
| 17Cl | Chlorine | 35.45 u | |
| 18Ar | Argon | 39.94 u | |
| 19K | Potassium | 39.09 u | |
| 20Ca | Calcium | 40.07 u | |
| 21Sc | Scandium | 44.95 u | |
| 22Ti | Titanium | 47.86 u | |
| 23V | Vanadium | 50.94 u | |
| 24Cr | Chromium | 51.99 u | |
| 25Mn | Manganese | 54.93 u | |
| 26Fe | Iron | 55.84 u | |
| 27Co | Cobalt | 58.93 u | |
| 28Ni | Nickel | 58.69 u | |
| 29Cu | Copper | 63.54 u | |
| 30Zn | Zinc | 65.38 u | |
| 31Ga | Gallium | 69.72 u | |
| 32Ge | Germanium | 72.63 u | |
| 33As | Arsenic | 74.92 u | |
| 34Se | Selenium | 78.97 u | |
| 35Br | Bromine | 79.9 u | |
| 36Kr | Krypton | 83.79 u | |
| 37Rb | Rubidium | 85.46 u | |
| 38Sr | Strontium | 87.62 u | |
| 39Y | Yttrium | 88.9 u | |
| 40Zr | Zirconium | 91.22 u | |
| 41Nb | Niobium | 92.9 u | |
| 42Mo | Molybdenum | 95.95 u | |
| 43Tc | Technetium | (98.9 u) | |
| 44Ru | Ruthenium | 101 u | |
| 45Rh | Rhodium | 102.9 u | |
| 46Pd | Palladium | 106.4 u | |
| 47Ag | Silver | 107.8 u | |
| 48Cd | Cadmium | 112.4 u | |
| 49In | Indium | 114.8 u | |
| 50Sn | Tin | 118.7 u | |
| 51Sb | Antimony | 121.7 u | |
| 52Te | Tellurium | 127.6 u | |
| 53I | Iodine | 126.9 u | |
| 54Xe | Xenon | 131.2 u | |
| 55Cs | Caesium | 132.9 u | |
| 56Ba | Barium | 137.3 u | |
| 57La | Lanthanum | 138.9 u | |
| 58Ce | Cerium | 140.1 u | |
| 59Pr | Praseodymium | 140.9 u | |
| 60Nd | Neodymium | 144.2 u | |
| 61Pm | Promethium | 146.9 u | |
| 62Sm | Samarium | 150.3 u | |
| 63Eu | Europium | 151.9 u | |
| 64Gd | Gadolinium | 157.2 u | |
| 65Tb | Terbium | 158.9 u | |
| 66Dy | Dysprosium | 162.5 u | |
| 67Ho | Holmium | 164.9 u | |
| 68Er | Erbium | 167.2 u | |
| 69Tm | Thulium | 168.9 u | |
| 70Yb | Ytterbium | 173 u | |
| 71Lu | Lutetium | 174.9 u | |
| 72Hf | Hafnium | 178.4 u | |
| 73Ta | Tantalum | 180.9 u | |
| 74W | Tungsten | 183.8 u | |
| 75Re | Rhenium | 186.2 u | |
| 76Os | Osmium | 190.2 u | |
| 77Ir | Iridium | 192.2 u | |
| 78Pt | Platinum | 195 u | |
| 79Au | Gold | 196.9 u | |
| 80Hg | Mercury | 200.5 u | |
| 81Tl | Thallium | 204.3 u | |
| 82Pb | Lead | 207.2 u | |
| 83Bi | Bismuth | 208.9 u | |
| 84Po | Polonium | (209.9 u) | |
| 85At | Astatine | (209.9 u) | |
| 86Rn | Radon | (222 u) | |
| 87Fr | Francium | (223 u) | |
| 88Ra | Radium | (226 u) | |
| 89Ac | Actinium | (227 u) | |
| 90Th | Thorium | 232 u | |
| 91Pa | Protactinium | 231 u | |
| 92U | Uranium | 238 u | |
| 93Np | Neptunium | (237 u) | |
| 94Pu | Plutonium | (244 u) | |
| 95Am | Americium | (243 u) | |
| 96Cm | Curium | (247 u) | |
| 97Bk | Berkelium | (247 u) | |
| 98Cf | Californium | (251 u) | |
| 99Es | Einsteinium | (252 u) | |
| 100Fm | Fermium | (257 u) | |
| 101Md | Mendelevium | (258 u) | |
| 102No | Nobelium | (259 u) | |
| 103Lr | Lawrencium | (266 u) | |
| 104Rf | Rutherfordium | (261.1 u) | |
| 105Db | Dubnium | (262.1 u) | |
| 106Sg | Seaborgium | (263.1 u) | |
| 107Bh | Bohrium | (262.1 u) | |
| 108Hs | Hassium | (265.2 u) | |
| 109Mt | Meitnerium | (268 u) | |
| 110Ds | Darmstadtium | (281 u) | |
| 111Rg | Roentgenium | (280 u) | |
| 112Cn | Copernicium | (277 u) | |
| 113Nh | Nihonium | (287 u) | |
| 114Fl | Flerovium | (289 u) | |
| 115Mc | Moscovium | (288 u) | |
| 116Lv | Livermorium | (293 u) | |
| 117Ts | Tennessine | (292 u) | |
| 118Og | Oganesson | (294 u) | |