Iron vs Krypton
| Property | Fe Iron | Kr Krypton |
|---|---|---|
| Atomic number | 26 | 36 |
| Symbol | Fe | Kr |
| Name | Iron | Krypton |
| Category | transition-metal | noble-gas |
| Standard Atomic Weight | 55.845 u | 83.798 u |
| Period | 4 | 4 |
| Group | 8 | 18 |
| Block | s | p |
| Phase at STP | solid | gas |
| Electron configuration | [Ar]4s23d6 | [Ar]4s23d104p6 |
| Oxidation states | [-4, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7] | [0, 1, 2] |
| Electronegativity (Pauling) | 1.83 | 3 |
| Electron affinity | 0.151 eV | -1 eV |
| Density | 7874 kg/m³ | 3.733 kg/m³ |
| Melting point | 1537.85 °C | -157.36 °C |
| Boiling point | 2860.85 °C | -153.42 °C |
| Discovery year | N/A | 1898 |