Atomic Properties
- Atomic Number
- 71
- Atomic Mass
- 174.9700 u
- Electron Configuration
- [Xe] 4f14 5d1 6s2
- Electronegativity
- 1.27
- Block
- d-block
- Group
- —
- Period
- 6
Physical Properties
- Phase (STP)
- solid
- Melting Point
- 1925.00 K
- Boiling Point
- 3675.00 K
- Density
- 9.8410 g/cm³
About Lutetium
Hardest and densest lanthanide; used in PET scanners and catalysts.
Isotopes of Lutetium
Lutetium has 2 naturally occurring isotopes.
| Isotope | Mass Number | Atomic Mass (u) | Abundance | Type |
|---|---|---|---|---|
| 175Lu | 175 | 174.9407752 | 97.40% | Stable |
| 176Lu | 176 | 175.9426897 | 2.599% | Stable |
Data source: NIH PubChem (aggregated from IUPAC, NIST)