Zirconium vs Rutherfordium
| Property | Zr Zirconium | Rf Rutherfordium |
|---|---|---|
| Atomic number | 40 | 104 |
| Symbol | Zr | Rf |
| Name | Zirconium | Rutherfordium |
| Category | transition-metal | transition-metal |
| Standard Atomic Weight | 91.224 u | 263 u |
| Period | 5 | 7 |
| Group | 4 | 4 |
| Block | s | s |
| Phase at STP | solid | solid |
| Electron configuration | [Kr]5s24d2 | [Rn]7s25f146d2 |
| Oxidation states | [1, 2, 3, 4] | [3, 4] |
| Electronegativity (Pauling) | 1.33 | N/A |
| Electron affinity | 0.426 eV | 0.65 eV |
| Density | 6520 kg/m³ | 2.330000e+4 kg/m³ |
| Melting point | 1854.85 °C | 2126.85 °C |
| Boiling point | 4408.85 °C | 5526.85 °C |
| Discovery year | 1789 | 1964 |