Cobalt vs Nickel
Pick up to 3 elements and see how they stack up.
| Property | Cobalt | Nickel |
|---|---|---|
| Atomic number | 27 | 28 |
| Atomic mass | 58.933 | 58.693 |
| Electronegativity | 1.88 | 1.91 |
| Melting point | 1,768 K (1,494.8 °C) | 1,728 K (1,454.8 °C) |
| Boiling point | 3,200 K (2,926.8 °C) | 3,186 K (2,912.8 °C) |
| Density | 8.9 g/cm³ | 8.908 g/cm³ |
| Atomic radius | 192 pm | 163 pm |
| Ionization energy | 7.881 eV | 7.64 eV |
| Discovered | 1735 | 1751 |
| Category | Transition metal | Transition metal |
| State at room temp. | Solid | Solid |
| Block | d | d |
| Group | 9 | 10 |
| Period | 4 | 4 |
| Valence electrons | 2 | 2 |
| Common charges | +2, +3 | +2, +3 |
| Electron configuration | [Ar] 3d7 4s2 | [Ar] 3d8 4s2 |