Fluorine vs Iodine
| Property | F Fluorine | I Iodine |
|---|---|---|
| Atomic number | 9 | 53 |
| Symbol | F | I |
| Name | Fluorine | Iodine |
| Category | halogen | halogen |
| Standard Atomic Weight | 18.998403 u | 126.90447 u |
| Period | 2 | 5 |
| Group | 17 | 17 |
| Block | p | p |
| Phase at STP | gas | solid |
| Electron configuration | [He]2s22p5 | [Kr]5s24d105p5 |
| Oxidation states | -1 | [-1, 1, 2, 3, 4, 5, 6, 7] |
| Electronegativity (Pauling) | 3.98 | 2.66 |
| Electron affinity | 3.4011 eV | 3.059 eV |
| Density | 1.696 kg/m³ | 4930 kg/m³ |
| Melting point | -219.62 °C | 113.7 °C |
| Boiling point | -188.12 °C | 184.4 °C |
| Discovery year | 1886 | 1811 |