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Gallium is a chemical element in the periodic table that has the symbol Ga and atomic number 31.

A rare, soft silvery metallic poor metal, gallium is a brittle solid at low temperatures but liquefies slightly above room temperature and indeed will melt in the hand.

It occurs in trace amounts in bauxite and zinc ores.

An important application is in the compound gallium arsenide, used as a semiconductor, most notably in light-emitting diodes (LEDs).

Elemental gallium is not found in nature, but it is easily obtained by smelting.

Note:   The above text is excerpted from the Wikipedia article "Gallium", which has been released under the GNU Free Documentation License.
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December 1, 2015

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