Erbium
Lanthanide| Atomic number | 68 |
|---|---|
| Category | Lanthanide |
| Atomic mass | 167.26 |
| Electron configuration | [Xe]4f¹² 6s² |
| Oxidation states | +3 |
| Electronegativity | 1.24 |
| Melting point | 1,529 °C |
| Boiling point | 2,868 °C |
| Density | 9.07 g/cm³ |
| Crystal structure | Close-packed hexagonal |
| Period | 6 |
| Block | f |
| Discovered | 1,843 |
| Crustal abundance | 3.5 ppm |