28Ni58.693
Nickel
Transition Metal
Solid at STP
Period 4Group 10Block DDiscovered 1751
[Ar]4s2 3d8
Nickel is a chemical element with symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden tinge. Nickel belongs to the transition metals and is hard and ductile.
📖 Read more on Wikipedia →Atomic Properties
| Atomic Number | 28 |
| Atomic Mass | 58.693 u |
| Electron Configuration | [Ar]4s2 3d8 |
| Oxidation States | +3, +2 |
| Electronegativity | 1.91 (Pauling) |
| Atomic Radius | 163 pm |
| Ionization Energy | 7.64 eV |
| Electron Affinity | 1.156 eV |
| Block | D |
Physical Properties
| Appearance | lustrous, metallic, and silver with a gold tinge |
| Standard State | Solid |
| Melting Point | 1728 K (1454.8 °C) |
| Boiling Point | 3186 K (2912.8 °C) |
| Density | 8.912 g/cm³ |
| Molar Heat | 26.07 J/(mol·K) |
| CPK Color | #50D050 |
Classification
| Category | Transition Metal |
| Group Block | Transition metal |
| Period | 4 |
| Group | 10 |
| Block | D |
Discovery
| Year Discovered | 1751 |
| Discovered By | Axel Fredrik Cronstedt |
| Electron Shells | 2, 8, 16, 2 |