Er
Erbium (Atomic Number 68)
Category: lanthanide | Period 6, Group 3 | Block: f
Pink rare earth metal amplifying optical signals in fiber cables.
Atomic & Physical Constants
- Standard Atomic Weight:
- 167.2593 u
- Standard State Phase:
- Solid
- Electron Configuration:
- 2, 8, 18, 30, 8, 2
- Electronegativity (Pauling):
- 1.24
- Melting Point:
- 1802 K
- Boiling Point:
- 3141 K
Historical Discovery & Real-World Applications
Industrial & Scientific Uses
Erbium-doped fiber amplifiers (EDFA) for global internet cables
Discovery History
Discovered by Carl Gustaf Mosander (1843).
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