Gallium, Ga, is a soft silvery metallic main group element, found in
Group IIIb of
the periodic table.
- Atomic Number : 31
- Relative Atomic Mass : 69.72
- Melting Point : 30 degC
- Boiling Point : 2403 degC
- Relative Density : 6
Gallium was discovered by Lecoq de Boisbaudran in 1875AD, when he
was studying zinc blende from the Pyrennees.
Gallium is widely distributed in minute quantities. It occurs in
germanite ore at approximately 0.5% level.
Gallium is isolated by the electrolysis of the alkaline solutions of
Gallium is a soft metal with a low melting point.
Gallium is used
- in thermometers for temperatures up to 100 degC, where it
is a liquid in alloy with indium and tin,
- in the semi-conductor industry in the manufacture of diodes
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