| Erbium | |
| Elemental State | Er |
| Electron Configuration | 1s22s22p63s23p63d104s24p64d105s25p66s24f12 |
| First Ionization Potential | 6.108 eV |
| Electron Affinity | |
| Z* | |
| Pauling Electronegativity | 1.24 |
| Covalent Radius | |
| Metallic Radius | |
| Ionic Radius | |
| van der Waal's Radius | |
| Melting Point | 1529 oC |
| Boiling Point | 2868 oC |
| Density | 9.066 g/cm3 |
| Other Properties | |