CHEM110
Molecular Geometry Practice
Name:
KEY
Fill in the missing information about the following covalent compounds or polyatomic ions:
formula/name
valence
electrons
PCl3 phosphorus trichloride.
5 + 3x7 =
26
LDS
molecular geometry/bond angles
trigonal pyramidal
<109
carbon tetrafluoride.
4 + 4x7 =
32
tetrahedral
CS2
carbon disulfide.
4 + 2x6 =
16
linear
H2S
hydrogen sulfide
CF4
2x1 + 6= 8
109
180
angular/bent
<109
formula/name
SiH4
NO3
NO2
-
-
silicon tetrahydride
(silane).
nitrate (ion) .
nitrite (ion) .
BCl3 boron trichloride
valence
electrons
2x1 + 6= 8
5 + 3x6 + 1
= 24
5 + 2x6 + 1
= 18
3 + 3x7 =
24
LDS
molecular geometry/bond angles
tetrahedral
109
trigonal planar
angular
120
<120
trigonal planar
120