La
Lanthanum (Atomic Number 57)
Category: lanthanide | Period 6, Group 3 | Block: f
Soft, ductile rare earth metal forming start of lanthanide series.
Atomic & Physical Constants
- Standard Atomic Weight:
- 138.905477 u
- Standard State Phase:
- Solid
- Electron Configuration:
- 2, 8, 18, 18, 9, 2
- Electronegativity (Pauling):
- 1.1
- Melting Point:
- 1193 K
- Boiling Point:
- 3737 K
Historical Discovery & Real-World Applications
Industrial & Scientific Uses
Hybrid car NiMH batteries, camera lens optical glass
Discovery History
Discovered by Carl Gustaf Mosander (1839).
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