Gallium
From Citizendium, the Citizens' Compendium
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Gallium is a chemical element, having the chemical symbol Ga. Its atomic number (the number of protons) is 31. It has a Standard Atomic Weight of 69.72, and is typically found as a solid in its elemental form.
Gallium is considered to be a member of the "Post-Transition Metal" family of elements, and has a boiling point of 2204°C.

