In detail

Gallium (Ga) properties


Atomic mass, symbol and atomic number

gallium is a naturally occurring element with the element symbol Ga and the atomic number 31. In the periodic table it stands with an atomic mass of 69.723 u in the 3rd main group. The chemical element discovered by Paul de Boisbaudran in 1875 is not radioactive and is in a solid state at room temperature.

Profile: Gallium (English gallium)

General
Chemical element:gallium
Symbol:Ga
Atomic number:31
Group:boron group
Period:4
Block:p-block
Series:metals
Appearance:silver
explorers:Paul Émile Lecoq de Boisbaudran
Year of discovery:1875
Atomic properties
Atomic mass:69,723 u
Atomic radius:130 pm
Covalent radius:122 pm
Van der Waals radius:187 pm
Electron configuration:Ar 3d10 4s2 4p1
ionization:578.8 kJ / mol
Physical Properties
Physical state:firmly
Density:5.904 g / cm3
Crystal structure:???
Magnetism:diamagnetic
molar volume:11,80 · 10-6 m3/ mol
Mohs hardness:1,5
Melting point:29 ° C
Boiling point:2400 ° C
Heat of fusion:5.59 kJ / mol
Heat of vaporization:256 kJ / mol
Thermal conductivity:29 W
Chemical properties
electronegativity:1,81

Did you know that ...

  • the chemist Dmitri Mendelejew predicted the existence of gallium four years before the actual discovery?
  • Gallium can be obtained by the Bayer process?
  • Photovoltaic systems consist to a certain extent of gallium?
  • Gallium with only 29 ° C has the lowest melting point of all metals?