Argon vs Antimony
| Property | Ar Argon | Sb Antimony |
|---|---|---|
| Atomic number | 18 | 51 |
| Symbol | Ar | Sb |
| Name | Argon | Antimony |
| Category | noble-gas | metalloid |
| Standard Atomic Weight | 39.948 u | 121.76 u |
| Period | 3 | 5 |
| Group | 18 | 15 |
| Block | p | p |
| Phase at STP | gas | solid |
| Electron configuration | [Ne]3s23p6 | [Kr]5s24d105p3 |
| Oxidation states | [0] | [-3, -2, -1, 0, 1, 2, 3, 4, 5] |
| Electronegativity (Pauling) | N/A | 2.05 |
| Electron affinity | -1 eV | 1.07 eV |
| Density | 1.7837 kg/m³ | 6685 kg/m³ |
| Melting point | -189.35 °C | 630.63 °C |
| Boiling point | -185.85 °C | 1586.85 °C |
| Discovery year | 1894 | 1707 |