Europium vs Thulium
| Property | Eu Europium | Tm Thulium |
|---|---|---|
| Atomic number | 63 | 69 |
| Symbol | Eu | Tm |
| Name | Europium | Thulium |
| Category | lanthanide | lanthanide |
| Standard Atomic Weight | 151.964 u | 168.93422 u |
| Period | 6 | 6 |
| Group | N/A | N/A |
| Block | s | s |
| Phase at STP | solid | solid |
| Electron configuration | [Xe]6s24f7 | [Xe]6s24f13 |
| Oxidation states | [0, 2, 3] | [0, 1, 2, 3] |
| Electronegativity (Pauling) | N/A | 1.25 |
| Electron affinity | 0.116 eV | 1.029 eV |
| Density | 5240 kg/m³ | 9320 kg/m³ |
| Melting point | 821.85 °C | 1544.85 °C |
| Boiling point | 1528.85 °C | 1949.85 °C |
| Discovery year | 1896 | 1879 |