- This article is about Beryllium. You may be looking for other element indicated by "Be", Beium.
Beryllium (symbol Be) is a chemical element, an alkaline earth metal with atomic number 4 on the periodic table. Beryllium has an atomic mass of 9.0122, and was discovered by Humans for the first time on Earth's European continent in the year 1828. (ST reference: Star Fleet Medical Reference Manual)