Europium vs Tantalum
| Property | Eu Europium | Ta Tantalum |
|---|---|---|
| Atomic number | 63 | 73 |
| Symbol | Eu | Ta |
| Name | Europium | Tantalum |
| Category | lanthanide | transition-metal |
| Standard Atomic Weight | 151.964 u | 180.94788 u |
| Period | 6 | 6 |
| Group | N/A | 5 |
| Block | s | s |
| Phase at STP | solid | solid |
| Electron configuration | [Xe]6s24f7 | [Xe]6s24f145d3 |
| Oxidation states | [0, 2, 3] | [-3, -1, 0, 1, 2, 3, 4, 5] |
| Electronegativity (Pauling) | N/A | 1.5 |
| Electron affinity | 0.116 eV | 0.322 eV |
| Density | 5240 kg/m³ | 1.640000e+4 kg/m³ |
| Melting point | 821.85 °C | 3016.85 °C |
| Boiling point | 1528.85 °C | 5457.85 °C |
| Discovery year | 1896 | 1802 |