Beryllium
From Citizendium, the Citizens' Compendium
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Beryllium is a chemical element, having the chemical symbol Be. Its atomic number (the number of protons) is 4. It has a Standard Atomic Weight of 9.012, and is typically found as a solid in its elemental form.
Beryllium is considered to be a member of the "Alkaline Earth Metal" family of elements, and has a boiling point of 2471°C.
Beryllium is toxic to living organisms.

