Argon vs Zirconium
| Property | Ar Argon | Zr Zirconium |
|---|---|---|
| Atomic number | 18 | 40 |
| Symbol | Ar | Zr |
| Name | Argon | Zirconium |
| Category | noble-gas | transition-metal |
| Standard Atomic Weight | 39.948 u | 91.224 u |
| Period | 3 | 5 |
| Group | 18 | 4 |
| Block | p | s |
| Phase at STP | gas | solid |
| Electron configuration | [Ne]3s23p6 | [Kr]5s24d2 |
| Oxidation states | [0] | [1, 2, 3, 4] |
| Electronegativity (Pauling) | N/A | 1.33 |
| Electron affinity | -1 eV | 0.426 eV |
| Density | 1.7837 kg/m³ | 6520 kg/m³ |
| Melting point | -189.35 °C | 1854.85 °C |
| Boiling point | -185.85 °C | 4408.85 °C |
| Discovery year | 1894 | 1789 |