Argon vs Bromine
| Property | Ar Argon | Br Bromine |
|---|---|---|
| Atomic number | 18 | 35 |
| Symbol | Ar | Br |
| Name | Argon | Bromine |
| Category | noble-gas | halogen |
| Standard Atomic Weight | 39.948 u | 79.904 u |
| Period | 3 | 4 |
| Group | 18 | 17 |
| Block | p | p |
| Phase at STP | gas | liquid |
| Electron configuration | [Ne]3s23p6 | [Ar]4s23d104p5 |
| Oxidation states | [0] | [-1, 1, 2, 3, 4, 5, 7] |
| Electronegativity (Pauling) | N/A | 2.96 |
| Electron affinity | -1 eV | 3.3635 eV |
| Density | 1.7837 kg/m³ | 3102.8 kg/m³ |
| Melting point | -189.35 °C | -7.2 °C |
| Boiling point | -185.85 °C | 58.8 °C |
| Discovery year | 1894 | 1825 |