1. Naming Molecular Compounds
How are the chemical formula and name of a molecular compound related?

2. Molecular Compounds Molecular Formula Number of Atoms of First Element
Number of Atoms of Second Element
Name of Compound
CO2
Carbon dioxide
Cl2O
Dichlorine monoxide
PCl5
Phosphorus pentachloride
N2O5
Dinitrogen pentoxide
Molecular compounds are composed of nonmetals bonded with nonmetals.
Covalent bonding is present in molecular compounds.
How do the names of the compounds relate to the number of atoms in the compound?
What are some ways that all the listed compounds are similar?
1,2
2,1
1,5
2,5
The prefixes indicate the number of atoms for each element.
They are all binary compounds, meaning the compound is made up of only two elements.

3. Prefixes & Suffixes Prefix Numerical Value mono- di- tri- tetra-
penta-
hexa-
hepta-
octa-
nona-
deca-
Molecular Formula
Name of Compound
SF6
Sulfur hexafluoride
IBr7
Iodine heptabromide
Cl2O
Dichlorine monoxide
P4O10
Tetraphosphorus decoxide
B5H9
Pentaboron nonahydride
Br3O8
Tribromine octoxide
All the compounds end in –ide.
When there is only one atom of the first element in the compound.
What suffix do all compounds share?
When is a prefix not used for the first element?

4. Practice Naming Molecular Formula Name of Compound PBr3 SCl4 N2F2 SO3
BrF
Disulfur decafluoride
Carbon tetrachloride
Oxygen difluoride
Dinitrogen trioxide
Tetraphosphorus heptasulfide
Phosphorus tribromide
Sulfur tetrachloride
Dinitrogen tetrafluoride
Sulfur trioxide
Bromine monofluoride
S2F10
CCl4
OF2
N2O3
P4S7

5. Mixed Naming Practice Molecular Formula Type of Compound/Bonding
Name of Compound
MgF2
CuF2
SF2
Sodium bromide
Gold(I) bromide
Iodine monobromide
Ionic Magnesium fluoride
Ionic Copper (II) fluoride
Molecular/Covalent Sulfur difluoride
NaBr Ionic
AuBr Ionic
Ibr Molecular/Covalent