Oxygen vs Gallium
| Property | O Oxygen | Ga Gallium |
|---|---|---|
| Atomic number | 8 | 31 |
| Symbol | O | Ga |
| Name | Oxygen | Gallium |
| Category | nonmetal | post-transition-metal |
| Standard Atomic Weight | 15.9994 u | 69.723 u |
| Period | 2 | 4 |
| Group | 16 | 13 |
| Block | p | p |
| Phase at STP | gas | solid |
| Electron configuration | [He]2s22p4 | [Ar]4s23d104p1 |
| Oxidation states | [-2, -1, 0, 1, 2] | [-5, -4, -3, -2, -1, 0, 1, 2, 3] |
| Electronegativity (Pauling) | 3.44 | 1.81 |
| Electron affinity | 1.4611 eV | 0.3 eV |
| Density | 1.429 kg/m³ | 5910 kg/m³ |
| Melting point | -218.79 °C | 29.76 °C |
| Boiling point | -182.95 °C | 2203.85 °C |
| Discovery year | 1771 | 1875 |