Argon vs Tantalum
| Property | Ar Argon | Ta Tantalum |
|---|---|---|
| Atomic number | 18 | 73 |
| Symbol | Ar | Ta |
| Name | Argon | Tantalum |
| Category | noble-gas | transition-metal |
| Standard Atomic Weight | 39.948 u | 180.94788 u |
| Period | 3 | 6 |
| Group | 18 | 5 |
| Block | p | s |
| Phase at STP | gas | solid |
| Electron configuration | [Ne]3s23p6 | [Xe]6s24f145d3 |
| Oxidation states | [0] | [-3, -1, 0, 1, 2, 3, 4, 5] |
| Electronegativity (Pauling) | N/A | 1.5 |
| Electron affinity | -1 eV | 0.322 eV |
| Density | 1.7837 kg/m³ | 1.640000e+4 kg/m³ |
| Melting point | -189.35 °C | 3016.85 °C |
| Boiling point | -185.85 °C | 5457.85 °C |
| Discovery year | 1894 | 1802 |