Thulium vs Ytterbium
| Property | Tm Thulium | Yb Ytterbium |
|---|---|---|
| Atomic number | 69 | 70 |
| Symbol | Tm | Yb |
| Name | Thulium | Ytterbium |
| Category | lanthanide | lanthanide |
| Standard Atomic Weight | 168.93422 u | 173.054 u |
| Period | 6 | 6 |
| Group | N/A | N/A |
| Block | s | s |
| Phase at STP | solid | solid |
| Electron configuration | [Xe]6s24f13 | [Xe]6s24f14 |
| Oxidation states | [0, 1, 2, 3] | [0, 1, 2, 3] |
| Electronegativity (Pauling) | 1.25 | N/A |
| Electron affinity | 1.029 eV | -0.02 eV |
| Density | 9320 kg/m³ | 6900 kg/m³ |
| Melting point | 1544.85 °C | 818.85 °C |
| Boiling point | 1949.85 °C | 1195.85 °C |
| Discovery year | 1879 | 1878 |