cobalt(II) (cobaltous)	Co2+
chromium(III) (chromic)	Cr3+
copper(I) (cuprous)	Cu+
copper(II) (cupric)	Cu2+
iron(II) (ferrous)	Fe2+
iron(III) (ferric)	Fe3+
mercury(II) (mercuric)	Hg2+
mercury(I) (mercurous)	Hg22+
manganese(II) (manganous)	Mn2+
lead(II) (plumbous)	Pb2+
tin(II) (stannous)	Sn2+