Skip to content
aidb
gallium
Image: Wikimedia Commons

gallium

Chemical element with symbol Ga and atomic number 31

Chemical elementchemical elementchalcophile elementQ861

Also known as 31Ga · Ga · element 31

Symbol
Atomic number
Mass
Melting point
  • 302.91 K
Boiling point
  • 2,673 K
Density
  • 5.904 g/cm³
  • , 6.095 g/cm³
Discovered by
Discovered
  • 1875

Overview

All data

147 statements · 22% with external sources · numbers in brackets are citations

Named after
Electronegativity
  • 1.81
Oxidation state
  • 3
  • 1
  • 2
  • -5
  • -4
  • -3
  • -2
  • -1
Show 1 more
  • 0
Canonical SMILES
Formula
Unicode character
Part of
Has effect
Different from
Ionic radius
  • 0.47 ångström charge number: 3 · coordination number: 4
  • 0.62 ångström charge number: 3 · coordination number: 6
Made from material
Bulk modulus
  • 50B Pa
Shear modulus
  • 30B Pa
Poisson's ratio
  • 0.25
Thermal conductivity
  • 29 watt per metre kelvin
Electrical conductivity
  • 7,140,000 siemens per metre
Specific heat capacity
  • 371 joule per kilogram kelvin
Speed of sound
  • 2,740 m/s
Electrical resistivity
  • 2.7e-7 ohm metre
Standard enthalpy of formation
  • 271.96 kilojoule per mole state of matter: gas
  • 5.58 kilojoule per mole state of matter: liquid
Standard molar entropy
  • 169.03 joule per mole kelvin state of matter: gas
  • 59.25 joule per mole kelvin state of matter: liquid
  • 40.83 joule per mole kelvin state of matter: solid
Mohs' hardness
  • 1.5
Has characteristic
Ionization energy
Subclass of
Electron configuration
IPA transcription
Crystal system
Atomic radius
  • 130 picometre
Covalent radius
  • 122 picometre
Van der Waals radius
  • 187 picometre

On other databases

75 identifiers linking gallium across the web's reference databases