438
| Atomic Mass | Name chemical element | Symbol | Atomic number |
| 1.0079 | Hydrogen | H | 1 |
| 4.0026 | Helium | He | 2 |
| 6.941 | Lithium | Li | 3 |
| 9.0122 | Beryllium | Be | 4 |
| 10.811 | Boron | B | 5 |
| 12.0107 | Carbon | C | 6 |
| 14.0067 | Nitrogen | N | 7 |
| 15.9994 | Oxygen | O | 8 |
| 18.9984 | Fluorine | F | 9 |
| 20.1797 | Neon | Ne | 10 |
| 22.9897 | Sodium | Na | 11 |
| 24.305 | Magnesium | Mg | 12 |
| 26.9815 | Aluminum | Al | 13 |
| 28.0855 | Silicon | Si | 14 |
| 30.9738 | Phosphorus | P | 15 |
| 32.065 | Sulfur | S | 16 |
| 35.453 | Chlorine | Cl | 17 |
| 39.0983 | Potassium | K | 19 |
| 39.948 | Argon | Ar | 18 |
| 40.078 | Calcium | Ca | 20 |
| 44.9559 | Scandium | Sc | 21 |
| 47.867 | Titanium | Ti | 22 |
| 50.9415 | Vanadium | V | 23 |
| 51.9961 | Chromium | Cr | 24 |
| 54.938 | Manganese | Mn | 25 |
| 55.845 | Iron | Fe | 26 |
| 58.6934 | Nickel | Ni | 28 |
| 58.9332 | Cobalt | Co | 27 |
| 63.546 | Copper | Cu | 29 |
| 65.39 | Zinc | Zn | 30 |
| 69.723 | Gallium | Ga | 31 |
| 72.64 | Germanium | Ge | 32 |
| 74.9216 | Arsenic | As | 33 |
| 78.96 | Selenium | Se | 34 |
| 79.904 | Bromine | Br | 35 |
| 83.8 | Krypton | Kr | 36 |
| 85.4678 | Rubidium | Rb | 37 |
| 87.62 | Strontium | Sr | 38 |
| 88.9059 | Yttrium | Y | 39 |
| 91.224 | Zirconium | Zr | 40 |
| 92.9064 | Niobium | Nb | 41 |
| 95.94 | Molybdenum | Mo | 42 |
| 98 | Technetium | Tc | 43 |
| 101.07 | Ruthenium | Ru | 44 |
| 102.9055 | Rhodium | Rh | 45 |
| 106.42 | Palladium | Pd | 46 |
| 107.8682 | Silver | Ag | 47 |
| 112.411 | Cadmium | Cd | 48 |
| 114.818 | Indium | In | 49 |
| 118.71 | Tin | Sn | 50 |
| 121.76 | Antimony | Sb | 51 |
| 126.9045 | Iodine | I | 53 |
| 127.6 | Tellurium | Te | 52 |
| 131.293 | Xenon | Xe | 54 |
| 132.9055 | Cesium | Cs | 55 |
| 137.327 | Barium | Ba | 56 |
| 138.9055 | Lanthanum | La | 57 |
| 140.116 | Cerium | Ce | 58 |
| 140.9077 | Praseodymium | Pr | 59 |
| 144.24 | Neodymium | Nd | 60 |
| 145 | Promethium | Pm | 61 |
| 150.36 | Samarium | Sm | 62 |
| 151.964 | Europium | Eu | 63 |
| 157.25 | Gadolinium | Gd | 64 |
| 158.9253 | Terbium | Tb | 65 |
| 162.5 | Dysprosium | Dy | 66 |
| 164.9303 | Holmium | Ho | 67 |
| 167.259 | Erbium | Er | 68 |
| 168.9342 | Thulium | Tm | 69 |
| 173.04 | Ytterbium | Yb | 70 |
| 174.967 | Lutetium | Lu | 71 |
| 178.49 | Hafnium | Hf | 72 |
| 180.9479 | Tantalum | Ta | 73 |
| 183.84 | Tungsten | W | 74 |
| 186.207 | Rhenium | Re | 75 |
| 190.23 | Osmium | Os | 76 |
| 192.217 | Iridium | Ir | 77 |
| 195.078 | Platinum | Pt | 78 |
| 196.9665 | Gold | Au | 79 |
| 200.59 | Mercury | Hg | 80 |
| 204.3833 | Thallium | Tl | 81 |
| 207.2 | Lead | Pb | 82 |
| 208.9804 | Bismuth | Bi | 83 |
| 209 | Polonium | Po | 84 |
| 210 | Astatine | At | 85 |
| 222 | Radon | Rn | 86 |
| 223 | Francium | Fr | 87 |
| 226 | Radium | Ra | 88 |
| 227 | Actinium | Ac | 89 |
| 231.0359 | Protactinium | Pa | 91 |
| 232.0381 | Thorium | Th | 90 |
| 237 | Neptunium | Np | 93 |
| 238.0289 | Uranium | U | 92 |
| 243 | Americium | Am | 95 |
| 244 | Plutonium | Pu | 94 |
| 247 | Curium | Cm | 96 |
| 247 | Berkelium | Bk | 97 |
| 251 | Californium | Cf | 98 |
| 252 | Einsteinium | Es | 99 |
| 257 | Fermium | Fm | 100 |
| 258 | Mendelevium | Md | 101 |
| 259 | Nobelium | No | 102 |
| 261 | Rutherfordium | Rf | 104 |
| 262 | Lawrencium | Lr | 103 |
| 262 | Dubnium | Db | 105 |
| 264 | Bohrium | Bh | 107 |
| 266 | Seaborgium | Sg | 106 |
| 268 | Meitnerium | Mt | 109 |
| 272 | Roentgenium | Rg | 111 |
| 277 | Hassium | Hs | 108 |
| Darmstadtium | Ds | 110 | |
| Copernicium | Cn | 112 | |
| Nihonium | Nh | 113 | |
| Flerovium | Fl | 114 | |
| Moscovium | Mc | 115 | |
| Livermorium | Lv | 116 | |
| Tennessine | Ts | 117 | |
| Oganesson | Og | 118 |
