The formula for the compound made from beryllium and bromine is BeBr2. Beryllium has a 2+ charge and bromine has a 1- charge, so two bromine ions are needed to balance the charge of one beryllium ion. Sodium nitride (Na3N) is the inorganic compound with the formula Na3N. In contrast to lithium nitride and some other nitrides, sodium nitride is an extremely unstable alkali metal nitride. It can be generated by combining atomic beams of sodium and nitrogen deposited onto a low-temperature sapphire substrate.last but least BaO
