Phosphorus vs Iodine
| Property | P Phosphorus | I Iodine |
|---|---|---|
| Atomic number | 15 | 53 |
| Symbol | P | I |
| Name | Phosphorus | Iodine |
| Category | nonmetal | halogen |
| Standard Atomic Weight | 30.973762 u | 126.90447 u |
| Period | 3 | 5 |
| Group | 15 | 17 |
| Block | p | p |
| Phase at STP | solid | solid |
| Electron configuration | [Ne]3s23p3 | [Kr]5s24d105p5 |
| Oxidation states | [-3, -2, -1, 0, 1, 2, 3, 4, 5] | [-1, 1, 2, 3, 4, 5, 6, 7] |
| Electronegativity (Pauling) | 2.19 | 2.66 |
| Electron affinity | 0.7466 eV | 3.059 eV |
| Density | 1820 kg/m³ | 4930 kg/m³ |
| Melting point | 44.15 °C | 113.7 °C |
| Boiling point | 280.5 °C | 184.4 °C |
| Discovery year | 1669 | 1811 |