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chromium (II)
Cr2+
chromium (III)
Cr3+
manganese (II)
Mn2+
manganese (III)
Mn3+
iron (II)
Fe2+
iron (III)
Fe3+
cobalt (II)
Co2+
cobolt (III)
Co3+
nickel (II)
Ni2+
nickel (III)
Ni3+
gold (I)
Au+
gold (III)
Au3+
copper (I)
Cu+
copper (II)
Cu2+
mercury (I)
Hg22+
mercury (II)
Hg2+
tin (II)
Sn2+
tin (IV)
Sn4+
lead (II)
Pb2+
lead (IV)
Pb4+
bismuth (III)
Bi3+
bismuth (V)
Bi5+