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Fe2+
Iron (II)
Fe3+
Iron (III)
Cu+
Copper (1)
Cu2+
Coper (II)
Co2+
Cobalt (II)
Co3+
Cobalt (III)
Cr2+
Chronium (II)
Cr3+
Chronium (III)
Sn2+
Tin(II)
Sn4+
Tin(IV)
Pb2+
lead (II)
Pb4+
Lead (IV)
Hg2 2+
Mercury (I)
Hg2_
Mercury (II)