Argon vs Lanthanum
| Property | Ar Argon | La Lanthanum |
|---|---|---|
| Atomic number | 18 | 57 |
| Symbol | Ar | La |
| Name | Argon | Lanthanum |
| Category | noble-gas | lanthanide |
| Standard Atomic Weight | 39.948 u | 138.90547 u |
| Period | 3 | 6 |
| Group | 18 | N/A |
| Block | p | s |
| Phase at STP | gas | solid |
| Electron configuration | [Ne]3s23p6 | [Xe]6s25d1 |
| Oxidation states | [0] | [0, 1, 2, 3] |
| Electronegativity (Pauling) | N/A | 1.1 |
| Electron affinity | -1 eV | 0.47 eV |
| Density | 1.7837 kg/m³ | 6150 kg/m³ |
| Melting point | -189.35 °C | 917.85 °C |
| Boiling point | -185.85 °C | 3463.85 °C |
| Discovery year | 1894 | 1839 |