| Lanthanum ✕ | |
|---|---|
| Symbol | La |
| Atomic number | 57 |
| Chemical property | Lanthanide |
| Origin o the name | the Greek lanthanein, 'to lie hidden' |
| Group | 3 |
| Period | 6 |
| Atomic weight (u) | 138.90547 |
| Atomic weight uncertainty (u) | 0.00007 |
| Density (g/cm³) | 6.145 |
| Melting point (K) | 1193 |
| Boiling point (K) | 3737 |
| Heat capacity (J/(g·K)) | 0.195 |
| Electro-negativity | 1.1 |
| Abundance in earth's crust (mg/kg) | 39 |