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Holmium

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

Original source

Holmium (Ho) is chemical element 67, a lanthanide in the f-block, period 6 (PubChem).

  • Atomic number: 67
  • Symbol: Ho
  • Group: none (f-block)
  • Period: 6
  • Atomic mass: 164.93033 u
  • Electron configuration: [Xe]6s2 4f11
  • Electronegativity (Pauling scale): 1.23
  • Atomic radius (van der Waals): 216 pm
  • Ionization energy: 6.022 eV
  • Oxidation states: +3
  • Standard state: Solid
  • Melting point: 1747 K
  • Boiling point: 2973 K
  • Density: 8.80 g/cm³
  • Chemical group: Lanthanide
  • Year discovered: 1878

Source and provenance

Original source
pubchem.ncbi.nlm.nih.gov
Published on Koskamo by
Koskamo
Citation version
Document v1
Reuse
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