Nitrogen is an enormously important element with a versatile chemistry. It is part of every protein. Our air consist of 78% of N₂. the chemical bond between the two atoms of the same element. This makes N₂ a very stable and inert gas. Ammonia, NH₃ which is itself toxic, is the base material for the nitrogen chemistry and is one of the most produced chemicals in the world. From this, for example fertilizers and explosives are made.