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 |