The rare earth that keeps the internet running: erbium amplifies light inside fibre-optic cable.
- Atomic number
- 68
- Atomic mass
- 167.259 u
- Phase
- Solid
- Electron configuration
- [Xe] 4f¹² 6s²
- Melting point
- 1,802 K · 1,528.9 °C
- Boiling point
- 3,141 K · 2,867.9 °C
- Density
- 9.066 g/cm³
- Electronegativity
- 1.24
- Period / Group
- 6 / —
- Discovery year
- 1843