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28
Ni
58.693
Nickel
Transition metals · Group 10 · Period 4
Atomic properties
| Atomic number | 28 |
|---|---|
| Symbol | Ni |
| Standard atomic weight | 58.693 |
| Classification | Transition metals |
| Group | 10 |
| Period | 4 |
| Block | d-block |
| Electron configuration | [Ar] 3d8 4s2 |
| Electronegativity (Pauling) | 1.91 |
| Common oxidation states | +2, +3 |
Physical properties
| Phase at 20 °C | Solid |
|---|---|
| Density | 8.908 g/cm³ |
| Melting point | 1455 °C |
| Boiling point | 2913 °C |
| Discovered | 1751 |
| CAS number | 7440-02-0 |
Reference guides for this element
High-purity drawn nickel wire for electronics, battery tabs and vacuum applications.
Nickel Wire 99.98+%