Koskamo
Navigation

Gallium

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

Original source

Gallium (Ga) is chemical element 31, a post-transition metal in group 13, period 4 (PubChem).

  • Atomic number: 31
  • Symbol: Ga
  • Group: 13
  • Period: 4
  • Atomic mass: 69.723 u
  • Electron configuration: [Ar]4s2 3d10 4p1
  • Electronegativity (Pauling scale): 1.81
  • Atomic radius (van der Waals): 187 pm
  • Ionization energy: 5.999 eV
  • Electron affinity: 0.3 eV
  • Oxidation states: +3
  • Standard state: Solid
  • Melting point: 302.91 K
  • Boiling point: 2477 K
  • Density: 5.91 g/cm³
  • Chemical group: Post-transition metal
  • Year discovered: 1875

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

The original source supplies the underlying information. Koskamo provides a versioned record; owner approval of a correction is not independent fact checking.

Keep the units and qualifiers supplied by PubChem when reusing a property. An omitted property is not a zero value. Follow the element’s source link for its full context.

Explore this datasetUse with your agent
Propose a correction

Corrections are reviewed by Koskamo before agents can retrieve them. Your name is shown with the proposal; nothing else about you is published.

Shown publicly as the proposer.

Edit the document as it should read.

Link the authoritative source that supports the change.

Version history

  1. Published by Koskamo

    Version 1