Nomenclature
Naming Binary Compounds
Binary Ionic Compounds
 Contain 2 different elements
 Name the metal first, then the nonmetal as -ide.
 Use name of a metal with a fixed charge
Groups 1, 2, 13
and Ag, Zn, and Cd
Examples:
NaCl
sodium chloride
ZnI2
zinc iodide
Al2O3
aluminum oxide
Naming Binary Compounds
Complete the names of the following binary
compounds:
Na3N
sodium
________________
KBr
potassium________________
Al2O3
aluminum ________________
MgS
_________________________
Solution
Complete the names of the following binary
compounds:
Na3N
sodium nitride
KBr
potassium bromide
Al2O3
aluminum oxide
MgS
magnesium sulfide
Transition Metals
Most form 2 or more positive ions
1+
2+
1+ or 2+
2+ or 3+
Ag+
Cd2+
Cu+, Cu2+
Fe2+, Fe3+
silver
ion
cadmium
ion
copper(I) ion iron(II) ion
copper (II) ion iron(III) ion
Zn2+
zinc ion
Names of Variable Ions
Use a roman number after the name of a
metal that forms two or more ions
Transition metals and
the metals in groups 14 and 15
FeCl3
(Fe3+)
iron (III) chloride
CuCl
SnF4
PbCl2
Fe2S3
(Cu+ )
(Sn4+)
(Pb2+)
(Fe3+)
copper (I) chloride
tin (IV) fluoride
lead (II) chloride
iron (III) sulfide
Naming Binary Compounds
Name the following compounds:
A. CaO
1) calcium oxide
2) calcium(I) oxide
3) calcium (II) oxide
B. SnCl4
1) tin tetrachloride
3) tin(IV) chloride
2) tin(II) chloride
C. Co2O3
1) cobalt oxide
3) cobalt trioxide
2) cobalt (III) oxide
Solution
Name the following compounds:
A. CaO
1) calcium oxide
B.
SnCl4
3) tin(IV) chloride
C.
Co2O3
2) cobalt (III) oxide
More Binary Compounds
Complete the names of the following binary
compounds with variable metal ions:
FeBr2
iron (_____) bromide
Cu2O
copper (_____) oxide
SnCl4
___(_____ ) ______________
Fe2O3
___ (_____) ______________
CuS
________________________
Solution
Complete the names of the following binary
compounds with variable metal ions:
FeBr2
iron ( II ) bromide
Cu2O
copper ( I ) oxide
SnCl4
tin (IV) chloride
Fe2O3
iron (III) oxide
CuS
copper (II) sulfide
Naming Binary Covalent
Compounds
Two nonmetals
 Name each element
 End the last element in -ide
 Add prefixes to show more than 1 atom
Prefixes
mon
di
tri
tetra
1
2
3
4
hexa
hepta
octa
nona
6
7
8
9
penta
5
deca
10
Naming Binary Covalent Compounds
CO
carbon ______oxide
CO2
carbon _______________
PCl3
phosphorus _______chloride
CCl4
carbon ________chloride
N 2O
_____nitrogen oxide
Solution
CO
carbon monoxide
CO2
carbon dioxide
PCl3
phosphorus trichloride
CCl4
carbon tetrachloride
N 2O
dinitrogen oxide
Binary Covalent Compounds
A.
P2O5
1) phosphorus oxide
2) phosphorus pentoxide
3) diphosphorus pentoxide
B.
Cl2O7
1) dichlorine heptoxide
2) dichlorine oxide
3) chlorine heptoxide
C.
Cl2
1) chlorine
2) dichlorine
3) dichloride
Solution
A.
P2O5
3) diphosphorus pentoxide
B.
Cl2O7
1) dichlorine heptoxide
C.
Cl2
1) chlorine (element)
Binary Elements
There are seven (7) elements which exist in
nature as diatomic species. This means that
two atoms combine to form a molecule.
These elements are: hydrogen, nitrogen,
oxygen, fluorine, chlorine, bromine, and
iodine. Remember: HONClBrIF
Binary Acids
An acid is a compound that is formed
between hydrogen and a second
nonmetal. Examine these two
compounds:
HCl and
HCl(aq)
These compounds are named:
hydrogen chloride and hydrochloric acid.
Binary Acids
The first compound is a typical binary
compound and follows the standard
binary system of nomenclature.
The second compound has (aq) after the
fromula which means aqueous. The
compound is dissolved in water. The
name for this compound is
prefix = hydro (means water)
add = acid (means that hydrogen is
present)
name = 2nd nonmetal with –ic added