Potassium
Alkali metal| Atomic number | 19 |
|---|---|
| Category | Alkali metal |
| Atomic mass | 39.098 |
| Electron configuration | [Ar]4s¹ |
| Oxidation states | +1 |
| Electronegativity | 0.82 |
| Melting point | 63.4 °C |
| Boiling point | 759 °C |
| Density | 0.862 g/cm³ |
| Crystal structure | Body-centred cubic |
| Group | 1 |
| Period | 4 |
| Block | s |
| Discovered | 1,807 |
| Crustal abundance | 20,900 ppm |
