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| Size | 512x512 |
#68 Erbium - rarity BROWNIAN-MANIACS
| 1st ionization energy | 6.022 eV | 1.69% |
|---|---|---|
| appearance | Silvery white metallic surface | 3.39% |
| atomic mass | 167.26 u | 0.85% |
| atomic number | 68 | 0.85% |
| atomic radius | 216 picometers (van der Waals radius) | 3.39% |
| boiling point | 3141 K or 2868 °C or 5194 °F | 0.85% |
| cas number | 7440-52-0 | 0.85% |
| cas number of (cl2) | - | 99.15% |
| category | Inner transition metals | 23.73% |
| crystal structure | HCP (Hexagonal close packed) | 5.93% |
| density | 9.06 g/cm3 | 0.85% |
| electronegativity | 1.23 (Pauling scale) | 1.69% |
| electronic configuration | [Xe] 4f12 6s2 | 0.85% |
| electrons | 68 | 0.85% |
| electrons arrangement | 2, 8, 18, 30, 8, 2 | 0.85% |
| main isotopes | 166Er | 0.85% |
| melting point | 1802 K or 1529 °C or 2784 °F | 0.85% |
| neutrons | 99 | 0.85% |
| position | Group: lanthanides, Period: 6, Block: f | 6.78% |
| rarity | BROWNIAN-MANIACS | 33.33% |
| state | Solid | 72.88% |
| sublimation point | - | 99.15% |
| symbol | Er | 0.85% |
| valence electrons | - | 61.02% |
| who discovered | Carl Gustaf Mosander (in 1843) | 0.85% |
Total Rarity Score: 1754.85
Rarity: #86/354