monatomic ion metals w multiple # of cations

Copper ions

Cu + Copper (I) ion
Cu 2+ Copper (II) ion

Iron ions

Fe 2+ Iron (III) ion
Fe 3+ Iron (IV) ion

Cobalt ions

Co 2+ Cobalt (II) ion
Co 3+ Cobalt (III) ion

Nickel ions

Ni 2+, Ni 3+

chromium ions

Cr 2+, Cr 3+

manganese ions

Mn 2+, Mn 3+

tin ions

Sn 2+, Sn 4+

Lead ions - plumbous/plumbic

Pb 2+, Pb 4+