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Manganese

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

Original source

Manganese (Mn) is chemical element 25, a transition metal in group 7, period 4 (PubChem).

  • Atomic number: 25
  • Symbol: Mn
  • Group: 7
  • Period: 4
  • Atomic mass: 54.93804 u
  • Electron configuration: [Ar]4s2 3d5
  • Electronegativity (Pauling scale): 1.55
  • Atomic radius (van der Waals): 197 pm
  • Ionization energy: 7.434 eV
  • Oxidation states: +7, +4, +3, +2
  • Standard state: Solid
  • Melting point: 1519 K
  • Boiling point: 2334 K
  • Density: 7.3 g/cm³
  • Chemical group: Transition metal
  • Year discovered: 1774

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