The transition metals can form more than one type of cation. Indicate charge on metal with Roman numerals.
Fe3+
Iron (III)
Fe2+
Iron (II)
Cu2+
Copper (II)
Cu+
Copper (I)
Co3+
Cobalt (III)
Co2+
Cobalt (II)
Sn4+
Tin (IV)
Sn2+
Tin (II)
Pb4+
Lead (IV)
Pb2+
Lead (II)
Hg2+
Mercury (II)
Hg22+
Mercury (I)