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La
Lanthanum
#57 · Lanthanide
| Mass | 138.91 u |
| Density | 6.145 g/cm³ |
| Melting | 1193.0 K |
| Boiling | 3737.0 K |
| Electronegativity | 1.1 |
| Ionization Energy | 538.1 kJ/mol |
| Atomic Radius | 187.0 pm |
| Block | f-block |
| State (RT) | Solid |
| Config | [Xe] 5d1 6s2 |