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Worksheets4.2 MOLECULAR GEOMETRY AND POLARITY
Total questions: 15
Worksheet time: 6mins
State VSEPR Theory.
The electron pairs in the valence shell surrounding a terminal atom repel one another and arrange themselves as far apart as possible to minimize the repulsion.
The electron pairs in the valence shell surrounding a central atom repel one another and arrange themselves as far apart as possible to minimize the repulsion.
The electron pairs in the valence shell surrounding a central atom repel one another and arrange themselves as close as possible to minimize the repulsion.
Any molecule with only two atoms must be linear. Three-atom molecules such as BeCl2 can also be linear. For linear molecules, the bond angle is
90°
180°
108°
120°
Which molecule would have this molecular geometry?
BF3
CH4
PCl5
CO2
What molecular geometry would PH3 have?
Trigonal Pyramidal
Trigonal Bipyramidal
Linear
Bent
A molecular geometry with 2 lone pairs and 4 bonding pairs is
Tetrahedral
Trigonal Bipyramidal
Square Planar
Square Pyramidal
Consider the molecule above. Determine the molecular geometry at each of the 2 labeled carbons.
C1 = tetrahedral, C2 = linear
C1 = trigonal planar, C2 = bent
C1 = bent, C2 = trigonal planar
C1 = trigonal planar, C2 = tetrahedral
To determine the molecular geometry of a compound by using VSEPR theory, double bond and triple bonds are considered as
two or three bonding pairs
two bonding pairs
five bonding pairs
one bonding pair
Determine the electron pair arrangement and molecular geometry of XeF4 (Lewis structure is shown).
tetrahedral ; tetrahedral
linear ; linear
octahedral ; square planar
trigonal bipyramidal ; tetrahedral
Classify the above molecule.
Polar
Non polar
Which of the following polyatomic molecules are non polar?
XeF2
O3
ICl4
PF3
Why is the molecule polar?
There is a non bonding pair electrons on the central atom.
There are different types of elements bonded to the central atom.
There are no non bonding pairs on the central atom and all of the atoms bonded to the central atom are the same.
Bond angle for trigonal pyramidal
120o
109.5o
104.5o
107.3o
