Gallium

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Crystals of Gallium (the shapes you can see in the silver coloured block) joined together.  They are very pure.
Crystals of Gallium (the shapes you can see in the silver coloured block) joined together. They are very pure.

Gallium (chemical symbol: Ga) is chemical element 31 on the periodic table.

Gallium is a metal, but is has some interesting properties. If you hold gallium in your hand, it will melt. Gallium does not conduct electricity well, and is known as a semiconductor. That means gallium can be used in computers to make them work.

Gallium is not dangerous to people because there is not much of it on the Earth.