Lithium
Alkali metal| Atomic number | 3 |
|---|---|
| Category | Alkali metal |
| Atomic mass | 6.94 |
| Electron configuration | [He]2s¹ |
| Oxidation states | +1 |
| Electronegativity | 0.98 |
| Melting point | 180.5 °C |
| Boiling point | 1,342 °C |
| Density | 0.534 g/cm³ |
| Crystal structure | Body-centred cubic |
| Group | 1 |
| Period | 2 |
| Block | s |
| Discovered | 1,817 |
| Crustal abundance | 20 ppm |
