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Fe2+
ferrous ion
Cu+
cuprous ion
Hg2 2+
mercurous ion
Cr2+
chromous ion
Fe3+
ferric ion
Cu2+
cupric ion
Hg2+
mercuric ion
Cr3+
chromic ion
Mn2+
manganous ion
Co2+
cobaltous ion
Ni2+
nickelous ion
Sn2+
stannous ion
Pb2+
plumbous ion