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Cobalt
Co^3+ Cobalt (III)
Co^2+ Cobalt (II)
Chromium
Cr^2+ (Chromium II)
Cr^3+ (Chromium III)
Copper
Cu^+
Cu^2+
Iron
Fe^2+
Fe^3+
Lead
Pb^2+
Pb^4+
Mercury
Hg2^2+
Hg^2+
Tin
Sn^2+
Sn^4+
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