Name:___________________________________ Date:____________ Period:_____
WS Naming Covalent (Molecular) Compounds
Rules for naming binary molecular compounds
 1st element has normal element name.
 2nd element has ending changed to –ide.
 Use prefixes to indicate how many of each element.
 Only use mono- with a single oxygen as 2nd element.
1 mono
6 hexa
Molecular Naming Prefixes
2 di
3 tri
4 tetra
7 hepta
8 octa
9 nona
5 penta
10 deca
A) Write Names for these Molecular Compounds.
Formula
Name
1.
Cl2O7
_______________________________
2.
N2O5
_______________________________
3.
P2Cl3
_______________________________
4.
ClO4
_______________________________
5.
SBr2
_______________________________
6.
SF6
_______________________________
7.
PCl3
_______________________________
8.
S2F10
_______________________________
9.
N2O
_______________________________
10.
NF3
_______________________________
11.
SeF6
_______________________________
12.
Si2Br6
_______________________________
13.
CCl4
_______________________________
14.
CO
_______________________________
15.
P2O5
_______________________________
16.
NF3
_______________________________
17.
P4S5
_______________________________
18.
SO2
_______________________________
19.
XeF4
_______________________________
20.
SiH4
_______________________________
OVER 
1
B) Write Formulas for these Molecular Compounds.
Name
Formula
1.
dinitrogen tetrahydride
____________
2.
carbon tetrachloride
____________
3.
diphosphorus trioxide
____________
4.
dichlorine heptoxide
____________
5.
carbon dioxide
____________
6.
carbon disulfide
____________
7.
iodine monofluoride
____________
8.
nitrogen triiodide
____________
9.
silicon disulfide
____________
10.
dinitrogen tetrabromide
____________
11.
arsenic tribromide
____________
12.
hexaboron silicide
____________
13.
chlorine dioxide
____________
14.
hydrogen iodide
____________
15.
iodine pentafluoride
____________
16.
dinitrogen trioxide
____________
17.
ammonia
____________
18.
phosphorus triiodide
____________
19.
tetraphosphorus decoxide
____________
20.
dihydrogen monoxide
____________
2