Beryllium has five neutrons, four electrons and four protons. Its atomic number is 4, and its chemical symbol is Be. This element belongs to the second group on the periodic table, which contains the alkaline earth metals.
Beryllium has a density of 1.85 grams per cubic centimeter, and its boiling point is 4,480 degrees Fahrenheit. In nature, minerals such as beryl and emerald contain the element beryllium. However, it was not until 1828, when two chemist independently isolated beryllium from beryllium chloride, that the element was created in a pure form. In the nuclear industry, beryllium serves as an alloying agent with metals such as copper and nickel, and it is used in structural parts for space vehicles.