← Back to the periodic table
71
Lu
174.97
Lutetium
Lanthanides · Group 17 · Period 6–7 (f)
Atomic properties
| Atomic number | 71 |
|---|---|
| Symbol | Lu |
| Standard atomic weight | 174.97 |
| Classification | Lanthanides |
| Group | f-block series |
| Period | 6 |
| Block | f-block (lanthanide) |
| Electron configuration | [Xe] 4f14 5d1 6s2 |
| Electronegativity (Pauling) | 1.27 |
| Common oxidation states | +3 |
Physical properties
| Phase at 20 °C | Solid |
|---|---|
| Density | 9.841 g/cm³ |
| Melting point | 1663 °C |
| Boiling point | 3402 °C |
| Discovered | 1907 |
| CAS number | — |