Krypton vs Iodine
| Property | Kr Krypton | I Iodine |
|---|---|---|
| Atomic number | 36 | 53 |
| Symbol | Kr | I |
| Name | Krypton | Iodine |
| Category | noble-gas | halogen |
| Standard Atomic Weight | 83.798 u | 126.90447 u |
| Period | 4 | 5 |
| Group | 18 | 17 |
| Block | p | p |
| Phase at STP | gas | solid |
| Electron configuration | [Ar]4s23d104p6 | [Kr]5s24d105p5 |
| Oxidation states | [0, 1, 2] | [-1, 1, 2, 3, 4, 5, 6, 7] |
| Electronegativity (Pauling) | 3 | 2.66 |
| Electron affinity | -1 eV | 3.059 eV |
| Density | 3.733 kg/m³ | 4930 kg/m³ |
| Melting point | -157.36 °C | 113.7 °C |
| Boiling point | -153.42 °C | 184.4 °C |
| Discovery year | 1898 | 1811 |