Naming Of Transition Metal Salts Worksheet
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1Chem 111/121
9/10/02
Nomenclature Worksheet 3: Naming of Transition metal salts
Like all metals, when transition metals combine with a nonmetal they form ionic compounds. They
differ from the Group A elements in that they can form cations with different charges. For example
2+
3+
iron can form both Fe
and Fe
ions. Because of this the charge (or oxidation state) of the metal in
the compound is usually included in the name. This is done by writing the oxidation state as a roman
numeral in parentheses directly following the name of the element. Sometimes older nomenclature is
used where the lower oxidation state is given an “ous” ending, the higher is given an “ic” ending. For
Chem 111 you should use the roman numeral (IUPAC) method.
IUPAC Name
Older name
2+
Fe
iron(II) ion
Ferrous ion
3+
Fe
iron(III) ion
Ferric ion
The charge for certain elements is so common that it is often not stated. Here are some exceptions:
Accepted Name
IUPAC Name
2+
Ni
nickel ion
nickel(II) ion
2+
Cu
copper ion
copper(II) ion
+
Ag
silver ion
silver(I) ion
2+
Zn
zinc ion
never written as zinc(II)
In addition to the transition metals, the Group 4A metals tin and lead can have +2 or +4 oxidation
2+
states. These are specified in the same manner: lead(IV), tin(II) and tin(IV). Pb
is just called lead
ion.
Name of compound
Formula of compound
1. chromium(II) chloride
2. copper(I) oxide
3. cobalt(II) sulfide
4. silver bromide
5. iron(II) nitride
6. copper fluoride
7. zinc iodide
8. lead(IV) oxide
9. tin(II) chloride
10. manganese(III) oxide
11.
SnF
2
12.
CuS
13.
Zn
P
3
2
14.
NiBr
2
15.
CrO
16.
AgI
17.
FeCl
3
18.
Co
O
2
3
19.
PbS
20.
Ag
S
2
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