Copper vs Gallium
| Property | Cu Copper | Ga Gallium |
|---|---|---|
| Atomic number | 29 | 31 |
| Symbol | Cu | Ga |
| Name | Copper | Gallium |
| Category | transition-metal | post-transition-metal |
| Standard Atomic Weight | 63.546 u | 69.723 u |
| Period | 4 | 4 |
| Group | 11 | 13 |
| Block | s | p |
| Phase at STP | solid | solid |
| Electron configuration | [Ar]4s13d10 | [Ar]4s23d104p1 |
| Oxidation states | [-2, 0, 1, 2, 3, 4] | [-5, -4, -3, -2, -1, 0, 1, 2, 3] |
| Electronegativity (Pauling) | 1.9 | 1.81 |
| Electron affinity | 1.235 eV | 0.3 eV |
| Density | 8933 kg/m³ | 5910 kg/m³ |
| Melting point | 1084.62 °C | 29.76 °C |
| Boiling point | 2561.85 °C | 2203.85 °C |
| Discovery year | N/A | 1875 |