Periodic table Relative Atomic Masses in tabular form
The Table below gives the relative atomic masses and the symbols of the elements. The relative atomic masses are accurate to one decimal place.
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| Element | Symbol | Ar | Element | Symbol | Ar | Element | Symbol | Ar |
| Actinium | Ac | – | Hafnium | Hf | 178.5 | Potassium | K | 39.1 |
| Aluminium | Al | 27.0 | Hahnium | Ha | – | Praseodymium | Pr | 140.9 |
| Americium | Am | – | Helium | He | 4.0 | Promethium | Pm | – |
| Antimony | Sb | 121.8 | Holmium | Ho | 164.9 | Protactinium | Pa | – |
| Argon | Ar | 39.9 | Hydrogen | H | 1.0 | Radium | Ra | – |
| Arsenic | As | 74.9 | Indium | In | 114.8 | Radon | Rn | – |
| Astatin | At | – | Iodine | I | 126.9 | Rhenium | Re | 186.2 |
| Barium | Ba | 137.3 | Iridium | Ir | 192.2 | Rhodium | Rh | 102.9 |
| Berkelium | Bk | – | Iron | Fe | 55.8 | Rubidium | Rb | 85.5 |
| Beryllium | Be | 9.0 | Krypton | Kr | 83.8 | Ruthenium | Ru | 101.1 |
| Bismuth | Bi | 209.0 | Kurebatovium | Ku | – | Samarium | Sm | 150.4 |
| Boron | B | 10.8 | Lanthanum | La | 138.9 | Scandium | Sc | 45.0 |
| Bromine | Br | 79.9 | Lawrencium | Lr | – | Selenium | Se | 79.0 |
| Cadmium | Cd | 112.4 | Lead | Pb | 207.2 | Silicon | Si | 28.1 |
| Caesium | Cs | 132.9 | Lithium | Li | 6.9 | Silver | Ag | 107.9 |
| Calcium | Ca | 40.1 | Lutetium | Lu | 175.0 | Sodium | Na | 23.0 |
| Californium | Cf | – | Magnesium | Mg | 24.3 | Stronium | Sr | 87.6 |
| Carbon | C | 12.0 | Manganese | Mn | 54.9 | Sulphur | S | 32.1 |
| Cerium | Ce | 140.1 | Mendelevium | Md | – | Tantalum | Ta | 180.9 |
| Chlorine | Cl | 35.5 | Mercury | Hg | 200.6 | Technetium | Tc | – |
| Chromium | Cr | 52.0 | Molybdenum | Mo | 95.9 | Tellurim | Te | 127.6 |
| Cobalt | Co | 58.9 | Neodynium | Nd | 144.2 | Terbium | Tb | 158.9 |
| Copper | Cu | 63.5 | Nickel | Ni | 58.7 | Thallium | Ti | 204.4 |
| Curium | Cm | – | Niobium | Nb | 92.9 | Thorium | Th | 232.0 |
| Dysprosium | Dy | 162.5 | Nitrogen | N | 14.0 | Thuliam | Tm | 169.9 |
| Einsteinium | Es | – | Nobelium | No | – | Tin | Sn | 118.7 |
| Erbium | Er | 167.3 | Osmium | Os | 190.2 | Titanium | Ti | 47.9 |
| Europium | Eu | 152.0 | Oxygen | O | 16.0 | Tungsten | W | 183.9 |
| Fermium | Fm | – | Palladium | Pd | 106.4 | Uranium | U | 238.0 |
| Flourine | F | 19.0 | Phosphorus | P | 31.0 | Vanadium | V | 50.9 |
| Francium | Fr | – | Platinum | Pt | 195.1 | Xenon | Xe | 131.3 |
| Gadolinium | Gd | 157.3 | Plutonium | Pu | – | ytterbium | Yb | 173.0 |
| Gallium | Ga | 69.7 | Polonium | Po | – | Yttrium | Y | 88.9 |
| Germanium | Ge | 72.6 | Neptonium | Np | – | Zinc | Zn | 65.4 |
| Gold | Au | 197.0 | Neon | Ne | 20.2 | Zirconium | Zr | 91.2 |
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