| Property | Value |
|---|---|
| Atomic number | 68 |
| Atomic weight | 167.2593 amu |
| Element family | N/A |
| Electronic configuration | 1s2 |
| Stable and very long lived isotopes | 162Er: 0.14%, 164Er: 1.61%, 166Er: 33.6%, 167Er: 22.95%, 168Er: 26.8%, 170Er: 14.9% |
| Previous element | Holmium |
| Next element | Thulium |
| Density | 9.066 g/cm3 (STP) |
| Melting | 1522 °C |
| Boiling | 2510 °C |
| Covalent radius | 1.65 Å |
| Ionic radius | 0.881 Å |
| Metallic radius | 1.761 Å |
| First ionization potential | 6.108 eV |
| Electron affinity | 0.312 eV |
| Electronegativity | 1.24 |
| Discovery year | 1843 |
| Sample compounds |
|---|
| Er2O3 |
Erbium is an element number 68 from n/a family. Its symbol is Er. Erbium atomic weight is 167.2593 amu. Er stable and long lived isotopes are 162Er: 0.14%, 164Er: 1.61%, 166Er: 33.6%, 167Er: 22.95%, 168Er: 26.8%, 170Er: 14.9%. Erbium electronic configuration is 1s22s22p63s23p63d104s24p64d105s25p66s24f12. Sample compounds that contain Erbium are Er2O3.
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