Yttrium vs Thulium
| Property | Y Yttrium | Tm Thulium |
|---|---|---|
| Atomic number | 39 | 69 |
| Symbol | Y | Tm |
| Name | Yttrium | Thulium |
| Category | transition-metal | lanthanide |
| Standard Atomic Weight | 88.90584 u | 168.93422 u |
| Period | 5 | 6 |
| Group | 3 | N/A |
| Block | s | s |
| Phase at STP | solid | solid |
| Electron configuration | [Kr]5s24d1 | [Xe]6s24f13 |
| Oxidation states | [0, 1, 2, 3] | [0, 1, 2, 3] |
| Electronegativity (Pauling) | 1.22 | 1.25 |
| Electron affinity | 0.307 eV | 1.029 eV |
| Density | 4470 kg/m³ | 9320 kg/m³ |
| Melting point | 1521.85 °C | 1544.85 °C |
| Boiling point | 3344.85 °C | 1949.85 °C |
| Discovery year | 1794 | 1879 |