| Lithium ✕ | |
|---|---|
| Symbol | Li |
| Atomic number | 3 |
| Chemical property | Alkali metal |
| Origin o the name | the Greek lithos, 'stone' |
| Group | 1 |
| Period | 2 |
| Atomic weight (u) | 6.94 |
| Atomic weight uncertainty (u) | 0 |
| Density (g/cm³) | 0.534 |
| Melting point (K) | 453.69 |
| Boiling point (K) | 1560 |
| Heat capacity (J/(g·K)) | 3.582 |
| Electro-negativity | 0.98 |
| Abundance in earth's crust (mg/kg) | 20 |