Gallium vs Krypton
| Property | Ga Gallium | Kr Krypton |
|---|---|---|
| Atomic number | 31 | 36 |
| Symbol | Ga | Kr |
| Name | Gallium | Krypton |
| Category | post-transition-metal | noble-gas |
| Standard Atomic Weight | 69.723 u | 83.798 u |
| Period | 4 | 4 |
| Group | 13 | 18 |
| Block | p | p |
| Phase at STP | solid | gas |
| Electron configuration | [Ar]4s23d104p1 | [Ar]4s23d104p6 |
| Oxidation states | [-5, -4, -3, -2, -1, 0, 1, 2, 3] | [0, 1, 2] |
| Electronegativity (Pauling) | 1.81 | 3 |
| Electron affinity | 0.3 eV | -1 eV |
| Density | 5910 kg/m³ | 3.733 kg/m³ |
| Melting point | 29.76 °C | -157.36 °C |
| Boiling point | 2203.85 °C | -153.42 °C |
| Discovery year | 1875 | 1898 |