(Stock
system)
Symbol
(Stock system)
Common
Symbol
Common
Cu
+
copper(I)
cuprous
Hg
2
2+
mercury(I)
mercurous
Cu
2+
copper(II)
cupric
Hg
2+
mercury(II)
mercuric
Fe
2+
iron(II)
ferrous
Pb
2+
lead(II)
plumbous
Fe
3+
iron(III)
ferric
Pb
4+
lead(IV)
plumbic
Sn
2+
tin(II)
stannous
Co
2+
cobalt(II)
cobaltous
Sn
4+
tin(IV)
stannic
Co
3+
cobalt(III)
cobaltic
Cr
2+
chromium(II)
chromous
Ni
2+
nickel(II)
nickelous
Cr
3+
chromium(III)
chromic
Ni
4+
nickel(IV)
nickelic
Mn
2+
manganese(II)
manganous
Au
+
gold(I)
aurous
Mn
3+
manganese(III)
manganic
Au
3+
gold(III)
auric