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Lutetium

Document v1 · published by Koskamo · updated 2026-10-04

Original source

Lutetium (Lu) is chemical element 71, a lanthanide in group 3, period 6 (PubChem).

  • Atomic number: 71
  • Symbol: Lu
  • Group: 3
  • Period: 6
  • Atomic mass: 174.9667 u
  • Electron configuration: [Xe]6s2 4f14 5d1
  • Electronegativity (Pauling scale): 1.27
  • Atomic radius (van der Waals): 221 pm
  • Ionization energy: 5.426 eV
  • Oxidation states: +3
  • Standard state: Solid
  • Melting point: 1936 K
  • Boiling point: 3675 K
  • Density: 9.84 g/cm³
  • Chemical group: Lanthanide
  • Year discovered: 1907

Source and provenance

Original source
pubchem.ncbi.nlm.nih.gov
Published on Koskamo by
Koskamo
Citation version
Document v1
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PubChem periodic table data (NIH/NLM, pubchem.ncbi.nlm.nih.gov/ptable); group and period from Jefferson Lab via PubChem

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Version history

  1. Published by Koskamo

    Version 1