Krypton vs Zirconium
| Property | Kr Krypton | Zr Zirconium |
|---|---|---|
| Atomic number | 36 | 40 |
| Symbol | Kr | Zr |
| Name | Krypton | Zirconium |
| Category | noble-gas | transition-metal |
| Standard Atomic Weight | 83.798 u | 91.224 u |
| Period | 4 | 5 |
| Group | 18 | 4 |
| Block | p | s |
| Phase at STP | gas | solid |
| Electron configuration | [Ar]4s23d104p6 | [Kr]5s24d2 |
| Oxidation states | [0, 1, 2] | [1, 2, 3, 4] |
| Electronegativity (Pauling) | 3 | 1.33 |
| Electron affinity | -1 eV | 0.426 eV |
| Density | 3.733 kg/m³ | 6520 kg/m³ |
| Melting point | -157.36 °C | 1854.85 °C |
| Boiling point | -153.42 °C | 4408.85 °C |
| Discovery year | 1898 | 1789 |