Hydrogen vs Gallium
| Property | H Hydrogen | Ga Gallium |
|---|---|---|
| Atomic number | 1 | 31 |
| Symbol | H | Ga |
| Name | Hydrogen | Gallium |
| Category | nonmetal | post-transition-metal |
| Standard Atomic Weight | 1.007975 u | 69.723 u |
| Period | 1 | 4 |
| Group | 1 | 13 |
| Block | s | p |
| Phase at STP | gas | solid |
| Electron configuration | 1s1 | [Ar]4s23d104p1 |
| Oxidation states | [-1, 1] | [-5, -4, -3, -2, -1, 0, 1, 2, 3] |
| Electronegativity (Pauling) | 2.2 | 1.81 |
| Electron affinity | 0.75419 eV | 0.3 eV |
| Density | 0.08988 kg/m³ | 5910 kg/m³ |
| Melting point | -259.34 °C | 29.76 °C |
| Boiling point | -252.87 °C | 2203.85 °C |
| Discovery year | 1766 | 1875 |