Argon vs Lead
| Property | Ar Argon | Pb Lead |
|---|---|---|
| Atomic number | 18 | 82 |
| Symbol | Ar | Pb |
| Name | Argon | Lead |
| Category | noble-gas | post-transition-metal |
| Standard Atomic Weight | 39.948 u | 207.2 u |
| Period | 3 | 6 |
| Group | 18 | 14 |
| Block | p | p |
| Phase at STP | gas | solid |
| Electron configuration | [Ne]3s23p6 | [Xe]6s24f145d106p2 |
| Oxidation states | [0] | [-4, -2, -1, 0, 1, 2, 3, 4] |
| Electronegativity (Pauling) | N/A | 2.33 |
| Electron affinity | -1 eV | 0.364 eV |
| Density | 1.7837 kg/m³ | 1.134200e+4 kg/m³ |
| Melting point | -189.35 °C | 327.46 °C |
| Boiling point | -185.85 °C | 1748.85 °C |
| Discovery year | 1894 | 2021 |