Zirconium vs Lanthanum
| Property | Zr Zirconium | La Lanthanum |
|---|---|---|
| Atomic number | 40 | 57 |
| Symbol | Zr | La |
| Name | Zirconium | Lanthanum |
| Category | transition-metal | lanthanide |
| Standard Atomic Weight | 91.224 u | 138.90547 u |
| Period | 5 | 6 |
| Group | 4 | N/A |
| Block | s | s |
| Phase at STP | solid | solid |
| Electron configuration | [Kr]5s24d2 | [Xe]6s25d1 |
| Oxidation states | [1, 2, 3, 4] | [0, 1, 2, 3] |
| Electronegativity (Pauling) | 1.33 | 1.1 |
| Electron affinity | 0.426 eV | 0.47 eV |
| Density | 6520 kg/m³ | 6150 kg/m³ |
| Melting point | 1854.85 °C | 917.85 °C |
| Boiling point | 4408.85 °C | 3463.85 °C |
| Discovery year | 1789 | 1839 |