Lutetium (Lu) — Element 71: Properties & Data | Aladdin Scientific
Lutetium(Lu) — Element 71
Lutetium (Lu) is a lanthanide with atomic number 71 and atomic mass 174.967. It has melting point 1936 K (1663 °C), boiling point 3675 K (3402 °C), density 9.84 g/cm³. It sits in period 6 of the periodic table and was discovered in 1907.
Key facts
| Atomic mass | 174.9667 u |
|---|---|
| Electron configuration | [Xe]6s2 4f14 5d1 |
| Oxidation states | +3 |
| Electronegativity (Pauling) | 1.27 |
| Atomic radius (van der Waals) | 221 pm |
| Ionization energy | 5.426 eV |
| Melting point | 1936 K |
| Boiling point | 3675 K |
| Density | 9.84 g/cm³ |
| Standard state | Solid |
| Year discovered | 1907 |
Frequently asked questions
What is the electron configuration of lutetium?
The ground-state electron configuration of lutetium is [Xe]6s2 4f14 5d1.
What group and period is lutetium in?
Lutetium (Lu) is in period 6 (lanthanide series) of the periodic table, classified as a lanthanide.
What is the melting point of lutetium?
Lutetium melts at 1936 K (1663 °C).
What is the standard state of lutetium?
Lutetium is a solid at standard temperature and pressure.
Related elements
About this data: property values compiled from IUPAC Standard Atomic Weights (2021), the NIST Atomic Spectra Database, and PubChem. Curated by the Aladdin Scientific technical team. Last reviewed: .