Cr2+
Chromium II (chromous)
Mn2+
Manganese (II) - Manganous
Fe2+
Iron (II): Ferrous
Co2+
Cobalt (II): cobaltous
Ni2+
Nickel (II): nickelous
Cu+
Copper (I): cuprous
Au+
Gold (I): aurous
Hg_2^2+
Mercury (I): mercurous
Sn2+
Tin (II): stannous
Pb2+
Lead (II): plumbous
As3+
Arsenic (III)
Sb3+
Antimony (III)
Bi3+
Bismuth (III)