List of Atomic elements, with weights and symbols
| Element | Symbol | Weight | Discovered |
|---|---|---|---|
| Actinium | Ac | 227.0000 | 1899 |
| Aluminum | Al | 26.9815 | 1825 |
| Americium | Am | 243.0000 | 1944 |
| Antimony | Sb | 121.7600 | 0 |
| Argon | Ar | 39.9480 | 1894 |
| Arsenic | As | 74.9216 | 0 |
| Astatine | At | 210.0000 | 1940 |
| Barium | Ba | 137.3270 | 1808 |
| Berkelium | Bk | 247.0000 | 1949 |
| Beryllium | Be | 9.0122 | 1797 |
| Bismuth | Bi | 208.9804 | 0 |
| Bohrium | Bh | 264.0000 | 1981 |
| Boron | B | 10.8110 | 1808 |
| Bromine | Br | 79.9040 | 1826 |
| Cadmium | Cd | 112.4110 | 1817 |
| Calcium | Ca | 40.0780 | 1808 |
| Californium | Cf | 251.0000 | 1950 |
| Carbon | C | 12.0107 | 0 |
| Cerium | Ce | 140.1160 | 1803 |
| Cesium | Cs | 132.9055 | 1860 |
| Chlorine | Cl | 35.4530 | 1774 |
| Chromium | Cr | 51.9961 | 1797 |
| Cobalt | Co | 58.9332 | 1735 |
| Copper | Cu | 63.5460 | 0 |
| Curium | Cm | 247.0000 | 1944 |
| Dubnium | Db | 262.0000 | 1967 |
| Dysprosium | Dy | 162.5000 | 1886 |
| Einsteinium | Es | 252.0000 | 1952 |
| Erbium | Er | 167.2590 | 1842 |
| Europium | Eu | 151.9640 | 1901 |
| Fermium | Fm | 257.0000 | 1952 |
| Fluorine | F | 18.9984 | 1886 |
| Francium | Fr | 223.0000 | 1939 |
| Gadolinium | Gd | 157.2500 | 1880 |
| Gallium | Ga | 69.7230 | 1875 |
| Germanium | Ge | 72.6400 | 1886 |
| Gold | Au | 196.9665 | 0 |
| Hafnium | Hf | 178.4900 | 1923 |
| Hassium | Hs | 277.0000 | 1984 |
| Helium | He | 4.0026 | 1895 |
| Holmium | Ho | 164.9303 | 1867 |
| Hydrogen | H | 1.0079 | 1776 |
| Indium | In | 114.8180 | 1863 |
| Iodine | I | 126.9045 | 1811 |
| Iridium | Ir | 192.2170 | 1803 |
| Iron | Fe | 55.8450 | 0 |
| Krypton | Kr | 83.8000 | 1898 |
| Lanthanum | La | 138.9055 | 1839 |
| Lawrencium | Lr | 262.0000 | 1961 |
| Lead | Pb | 207.2000 | 0 |
| Lithium | Li | 6.9410 | 1817 |
| Lutetium | Lu | 174.9670 | 1907 |
| Magnesium | Mg | 24.3050 | 1755 |
| Manganese | Mn | 54.9380 | 1774 |
| Meitnerium | Mt | 268.0000 | 1982 |
| Mendelevium | Md | 258.0000 | 1955 |
| Mercury | Hg | 200.5900 | 0 |
| Molybdenum | Mo | 95.9400 | 1781 |
| Neodymium | Nd | 144.2400 | 1885 |
| Neon | Ne | 20.1797 | 1898 |
| Neptunium | Np | 237.0000 | 1940 |
| Nickel | Ni | 58.6934 | 1751 |
| Niobium | Nb | 92.9064 | 1801 |
| Nitrogen | N | 14.0067 | 1772 |
| Nobelium | No | 259.0000 | 1958 |
| Osmium | Os | 190.2300 | 1803 |
| Oxygen | O | 15.9994 | 1774 |
| Palladium | Pd | 106.4200 | 1803 |
| Phosphorus | P | 30.9738 | 1669 |
| Platinum | Pt | 195.0780 | 1735 |
| Plutonium | Pu | 244.0000 | 1940 |
| Polonium | Po | 209.0000 | 1898 |
| Potassium | K | 39.0983 | 1807 |
| Praseodymium | Pr | 140.9077 | 1885 |
| Promethium | Pm | 145.0000 | 1945 |
| Protactinium | Pa | 231.0359 | 1913 |
| Radium | Ra | 226.0000 | 1898 |
| Radon | Rn | 222.0000 | 1900 |
| Rhenium | Re | 186.2070 | 1925 |
| Rhodium | Rh | 102.9055 | 1803 |
| Rubidium | Rb | 85.4678 | 1861 |
| Ruthenium | Ru | 101.0700 | 1844 |
| Rutherfordium | Rf | 261.0000 | 1964 |
| Samarium | Sm | 150.3600 | 1879 |
| Scandium | Sc | 44.9559 | 1879 |
| Seaborgium | Sg | 266.0000 | 1974 |
| Selenium | Se | 78.9600 | 1817 |
| Silicon | Si | 28.0855 | 1824 |
| Silver | Ag | 107.8682 | 0 |
| Sodium | Na | 22.9897 | 1807 |
| Strontium | Sr | 87.6200 | 1790 |
| Sulfur | S | 32.0650 | 0 |
| Tantalum | Ta | 180.9479 | 1802 |
| Technetium | Tc | 98.0000 | 1937 |
| Tellurium | Te | 127.6000 | 1783 |
| Terbium | Tb | 158.9253 | 1843 |
| Thallium | Tl | 204.3833 | 1861 |
| Thorium | Th | 232.0381 | 1829 |
| Thulium | Tm | 168.9342 | 1879 |
| Tin | Sn | 118.7100 | 0 |
| Titanium | Ti | 47.8670 | 1791 |
| Tungsten | W | 183.8400 | 1783 |
| Uranium | U | 238.0289 | 1789 |
| Vanadium | V | 50.9415 | 1830 |
| Xenon | Xe | 131.2930 | 1898 |
| Ytterbium | Yb | 173.0400 | 1878 |
| Yttrium | Y | 88.9059 | 1794 |
| Zinc | Zn | 65.3900 | 0 |
| Zirconium | Zr | 91.2240 | 1789 |