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Ga

Gallium

3169.72
General Information
  • Melting Point: 303 K (30°C)
  • Boiling Point: 2673 K (2400°C)
  • Density: 5.910 g/cm3
  • Type of Substance: Post-Transition Metal
  • Discovered By: Paul-Emile Lecoq de Boisbaudran
  • Year of Discovery: 1875
Electrons and Ionisation
  • Electron Configuration: [Ar] 3d10 4s2 4p1
  • Electrons Per Shell: 2, 8, 18, 3
  • Oxidation States: 3, 2, 1, −1, −2, −4, −5
  • Electronegativity: 1.81
History

Gallium was an element whose existence was predicted by Mendeleev in 1871. He predicted that the then unknown element gallium should resemble aluminium in its properties. Gallium was discovered spectroscopically by Paul-Emile Lecoq de Boisbaudran in 1875, who in the same year obtained the free metal by electrolysis of a solution of the hydroxide

Engineering
  • Resistivity: 270  nΩ·m
  • Poisson Ratio: 0.47
  • Magnetism: Diamagnetism
  • Young's Modulus: 9.8 GPa
  • Mohs Hardness: 2
  • Brinell Hardness: 56 - 8 MPa
  • Thermal Expansion: 18×10-6 K-1
  • Thermal Conductivity: 40.6 W/m·K