Argon vs Iodine
| Property | Ar Argon | I Iodine |
|---|---|---|
| Atomic number | 18 | 53 |
| Symbol | Ar | I |
| Name | Argon | Iodine |
| Category | noble-gas | halogen |
| Standard Atomic Weight | 39.948 u | 126.90447 u |
| Period | 3 | 5 |
| Group | 18 | 17 |
| Block | p | p |
| Phase at STP | gas | solid |
| Electron configuration | [Ne]3s23p6 | [Kr]5s24d105p5 |
| Oxidation states | [0] | [-1, 1, 2, 3, 4, 5, 6, 7] |
| Electronegativity (Pauling) | N/A | 2.66 |
| Electron affinity | -1 eV | 3.059 eV |
| Density | 1.7837 kg/m³ | 4930 kg/m³ |
| Melting point | -189.35 °C | 113.7 °C |
| Boiling point | -185.85 °C | 184.4 °C |
| Discovery year | 1894 | 1811 |