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Silver
Ag+
Zinc
Zn2+
Copper
Cu+, Cu2+
Mercury
Hg2+, Hg22+
Gold
Au+, Au3+
Iron
Fe2+, Fe3+
Cobalt
Co2+, Co3+
Nickel
Ni2+, Ni3+
Tin
Sn2+, Sn4+
Lead
Pb2+, Pb4+