Cobalt vs Iodine
| Property | Co Cobalt | I Iodine |
|---|---|---|
| Atomic number | 27 | 53 |
| Symbol | Co | I |
| Name | Cobalt | Iodine |
| Category | transition-metal | halogen |
| Standard Atomic Weight | 58.933194 u | 126.90447 u |
| Period | 4 | 5 |
| Group | 9 | 17 |
| Block | s | p |
| Phase at STP | solid | solid |
| Electron configuration | [Ar]4s23d7 | [Kr]5s24d105p5 |
| Oxidation states | [-3, -1, 0, 1, 2, 3, 4, 5] | [-1, 1, 2, 3, 4, 5, 6, 7] |
| Electronegativity (Pauling) | 1.88 | 2.66 |
| Electron affinity | 0.661 eV | 3.059 eV |
| Density | 8860 kg/m³ | 4930 kg/m³ |
| Melting point | 1494.85 °C | 113.7 °C |
| Boiling point | 2926.85 °C | 184.4 °C |
| Discovery year | 1735 | 1811 |