The Periodic Table of Elements
57
La
Lanthanum
138.90547(7) amu
Additional Information:
| State | Group Block | Density | Atomic Radius | Electron Affinity | Ionization Energy | Melting Point | Boiling Point | Year Discovered |
|---|---|---|---|---|---|---|---|---|
| solid | lanthanoid | 6.146 kg/L | 169 pm | -48 | 538 kJ/mol | 1193 °K | 3737 °K | 1839 |
