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Praseodymium

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

Original source

Praseodymium (Pr) is chemical element 59, a lanthanide in the f-block, period 6 (PubChem).

  • Atomic number: 59
  • Symbol: Pr
  • Group: none (f-block)
  • Period: 6
  • Atomic mass: 140.90766 u
  • Electron configuration: [Xe]6s2 4f3
  • Electronegativity (Pauling scale): 1.13
  • Atomic radius (van der Waals): 239 pm
  • Ionization energy: 5.464 eV
  • Oxidation states: +3
  • Standard state: Solid
  • Melting point: 1204 K
  • Boiling point: 3793 K
  • Density: 6.77 g/cm³
  • Chemical group: Lanthanide
  • Year discovered: 1885

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