12.7.1 Structure and bonding of N2
12.7.2 Ammonia and its reactions as base, ligand and reducing agent
12.7.3 Ammonium salts
12.7.4 Oxides of nitrogen
12.7.5 Nitric(III) (nitrous) acid and salts
12.7.6 Nitric(V) (nitric) acid and salts