| name | Potassium |
| latin | Kalium |
| french | Potassium |
| german | Kalium |
| symbol | K |
| proton number | 19 |
| atomic weight | 39.0983 |
| Pauling electronegativity | 0.82 |
| electronic configuration | [Ar] 4s1 1s22s22p63s23p64s1 |
| melting point | 336.53 K, 63.38°C, 146.08°F |
| boiling point | 1032 K, 759°C, 1398°F |
| group | 1 |
| period | 4 |
| state (by 20°C) | solid |
| oxidation states | +1 |
| Year of discovery | Discoverer |
| 1807 | Sir Humphry Davy (1778-1829) |