| Cobalt | |
| Elemental State | Co |
| Electron Configuration | 1s22s22p63s23p64s23d7 |
| First Ionization Potential | 7.881 eV |
| Electron Affinity | 0.662 eV |
| Z* | 5.576 (Clementi-Raimondi) |
| Pauling Electronegativity | 1.88 |
| Covalent Radius | 1.26 Å |
| Metallic Radius | 1.25 Å |
| Ionic Radius | 0.72 Å Co2+ coordination number
= 4; high spin
0.81 Å Co2+ coordination number = 5 0.79 Å Co2+ coordination number = 6; low spin 0.885 Å Co2+ coordination number = 6; high spin 1.04 Å Co2+ coordination number = 8 0.685 Å Co3+ coordination number = 6; low spin 0.75 Å Co3+ coordination number = 6; high spin |
| van der Waal's Radius | |
| Melting Point | 1495 oC |
| Boiling Point | 2927 oC |
| Density | 8.9 g/cm3 |
| Other Properties | |