Mg + N2 = Mg3N2=

Fe + N2 = FeN=

P + N2 = P3N2=

NH3 + Mg = Mg3N2 + H2=

Mg3N2 + PCl3 = MgCl2 + P3N5=

P3N5 + O2 = P2O5 + N2=