Nickel vs Copper
| Property | Ni Nickel | Cu Copper |
|---|---|---|
| Atomic number | 28 | 29 |
| Symbol | Ni | Cu |
| Name | Nickel | Copper |
| Category | transition-metal | transition-metal |
| Standard Atomic Weight | 58.6934 u | 63.546 u |
| Period | 4 | 4 |
| Group | 10 | 11 |
| Block | s | s |
| Phase at STP | solid | solid |
| Electron configuration | [Ar]4s23d8 | [Ar]4s13d10 |
| Oxidation states | [-2, -1, 0, 1, 2, 3, 4] | [-2, 0, 1, 2, 3, 4] |
| Electronegativity (Pauling) | 1.91 | 1.9 |
| Electron affinity | 1.156 eV | 1.235 eV |
| Density | 8912 kg/m³ | 8933 kg/m³ |
| Melting point | 1454.85 °C | 1084.62 °C |
| Boiling point | 2912.85 °C | 2561.85 °C |
| Discovery year | 1751 | N/A |