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VSEPR and Lewis Structures

Total questions: 96

Worksheet time: 52mins

Name
Class
Date
1.
A Lewis structure can be used for showing an ionic bond but instead for dashes for the bonds positive and negative _____ are represented.
a)
atoms
b)
ions
c)
molecules
d)
electrons
2.

How many valence electrons should be used in the Lewis Structure for : NO3 -

a)

23

b)

20

c)

18

d)

24

3.

Which of the following is the correct Lewis dot structure for the molecule fluorine (F2)?

a)

A

b)

B

c)

C

d)

D

4.
What is the correct structure for BF3?
a)
Option A.
b)
Option B. 
c)
Option C.
d)
Option D.
5.
How many valence electrons are in Phosphorus?
a)
15
b)
4
c)
5
d)
31
6.
What is the correct formula for this molecule?
a)
NH
b)
N3H
c)
NH3
d)
NH4
7.
What is the correct formula for this molecule?
a)
Si4F
b)
SiF4
c)
SiF
d)
Si4F4
8.

What is the overall formal charge of this compound?

a)

0

b)

-1

c)

4

d)

-4

e)

+1

9.
Will this molecule be polar or nonpolar? PH3
a)
polar
b)
nonpolar
10.
Which of the following is the correct Lewis structure for the compound PBr3?
a)
structure A
b)
structure B
c)
structure C
d)
structure D
11.
Will this molecule be polar or nonpolar? CS2
a)
polar
b)
nonpolar
12.

Which image could be a representation of NH3?

a)

A

b)

B

c)

C

13.

A molecule of water has what molecular shape?

a)

Linear

b)

Tetrahedral

c)

Bent

d)

Triangular

14.
What molecule could this be? 
a)
BF3
b)
CH4
c)
H2O
d)
CO2
15.

What molecule could this be?

a)

CH4

b)

CO2

c)

PCl5

d)

BF3

16.

A molecule of methane has what molecular shape?

a)

Tetrahedral

b)

Triangular

c)

Pyramidal

d)

Octahedral

17.
What molecule could this be? 
a)
H2O
b)
CCl4
c)
PCl5
d)
NaCl
18.
Which molecule would have this molecular geometry?
a)
BF3
b)
CH4
c)
PCl5
d)
CO2
19.

What molecule could this be? Note the dark blue is considered a lone pair.

a)

H2O

b)

NH3

c)

CO2

d)

CH4

20.

What compound could this be? Note the dark blue is considered a lone pair.

a)

CO2

b)

NH3

c)

H2S

d)

CH4

21.
Multiple bonds are possible if _______, ______, and ________ are present in a molecule.
a)
C,H,O
b)
H,O,N
c)
C,N,S
d)
C,N,O
22.
The theory that is used to predict the arrangement of atoms about a central atom is called?
a)
Valence shell repulsion
b)
Valence shell electron sharing
c)
Valence shell electron pair repulsion
d)
Valence electron shell repulsion pair
23.
This is the correct dot diagram for sodium (Na)
a)
true
b)
false
24.
 Lone electron pairs in a molecule...
a)
Never exist
b)
Are lost in space
c)
Creates an isotope
d)
Push the bonded atoms closer
25.
This is a correct dot diagram for fluorine (F)
a)
true
b)
false
26.
Which of the following shapes has an unshared pairs of electrons on the central atom? 
a)
Bipyramidal
b)
Bent
c)
Trigonal Planar
d)
Tetrahedral
27.
What is the molecular shape of a silicon dioxide molecule?
a)
linear
b)
trigonal planar
c)
bent
d)
tetrahedral
28.
According to the octet rule most elements need _______ valence electrons.
a)
2
b)
8
c)
6
d)
18
29.
When writing Lewis Structures, only __________ electrons are used.
a)
Inner shell
b)
Core 
c)
Valence
d)
Stable
30.
How many electrons does each line indicate are shared?
a)
1
b)
2
c)
3
d)
4
31.
Hydrogen needs _____ electrons in its valence shell to be stable.
a)
4
b)
6
c)
8
d)
2
32.
Atoms of H only form _________ bonds.
a)
Double
b)
Single
c)
Multiple
d)
Triple
33.
A Lewis structure can be used for showing an ionic bond but instead for dashes for the bonds positive and negative _____ are represented.
a)
atoms
b)
ions
c)
molecules
d)
electrons
34.
This is a correct dot diagram for oxygen (O)
a)
true
b)
false
35.

How many valence electrons does Carbon have

a)

1

b)

4

c)

5

d)

3

36.
What is the VSEPR theory used to predict?
a)
Bond Strength
b)
Polarity
c)
Molecular Shape
d)
Electronegativity
37.
What molecular shape is the structure shown here? (BCl3)
a)
linear
b)
trigonal planar
c)
tetrahedral
d)
trigonal pyramidal
38.
How many lone pairs are in this molecule's structure?
a)
6
b)
2
c)
0
d)
4
39.
What molecular shape is the structure shown here? (NH4+)
a)
linear
b)
trigonal planar
c)
tetrahedral
d)
trigonal pyramidal
40.
Consider the molecule below.  Determine the molecular geometry at each of the 2 labeled carbons.
a)
C1 = tetrahedral, C2 = linear
b)
C1 = trigonal planar, C2 = bent
c)
C1 = bent, C2 = trigonal planar
d)
C1 = trigonal planar, C2 = tetrahedral
41.

Molecules such as boron trichloride that have three bonded atoms and no unshared pairs have what shape?

a)

trigonal planar

b)

trigonal pyramidal

c)

trigonal bipyramidal

d)

tetrahedral

42.
In the correct Lewis structure for CH4, how many unshared electron pairs surround the carbon?
a)
2
b)
8
c)
0
d)
4
43.

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

a)

360°360\degree

b)

180°180\degree

c)

120°120\degree

d)

90°90\degree

44.
This is the correct dot diagram for nitrogen (N)
a)
true
b)
false
45.
How many electrons should Oxygen have around its Lewis dot model?
a)
5
b)
6
c)
7
d)
8
46.
What is the measure of a tetrahedral bond angle?
a)
90 Degrees
b)
109.5 Degrees
c)
120 Degrees
d)
180 Degrees
47.
Each line in a Lewis Structure represents __________ electron(s).
a)
3
b)
2
c)
1
d)
4
48.
This is a correct dot diagram for fluorine (F)
a)
true
b)
false
49.
This is a correct dot diagram for oxygen (O)
a)
true
b)
false
50.
This is the correct dot diagram for sodium (Na)
a)
true
b)
false
51.

Using the chart, determine the molecular shape of a molecule with 3 bonded atoms and 2 lone pairs?

a)

T-Shape

b)

Trigonal Bipyramid

c)

See-Saw

d)

Square Planar

52.
*
a)
linear
b)
trigonal planar
c)
trigonal pyramid
d)
bent of angular
53.
Which of the following is the correct Lewis structure for the compound PBr3?
a)
structure A
b)
structure B
c)
structure C
d)
structure D
54.

Which Lewis Dot Model drawing correctly shows an O2 molecule?

a)
b)
c)
d)
55.
Which of the following is the correct Lewis structure for water?
a)
A
b)
B
c)
C
56.
In CO2, how many UNSHARED pairs of electrons does each oxygen have?
a)
2
b)
1
c)
4
d)
6
57.

Which of the elements in the picture has correct electron dot notation?

a)

1

b)

2

c)

3

d)

4

58.
Atoms of H only form _________ bonds.
a)
Double
b)
Single
c)
Multiple
d)
Triple
59.
How many electrons should Sulfur have around its Lewis dot model?
a)
5
b)
6
c)
7
d)
8
60.
This is the correct dot diagram for nitrogen (N)
a)
true
b)
false
61.
This is a correct dot diagram for nitrogen (N)
a)
true
b)
false
62.

Which image could be a representation of NH3?

a)

A

b)

B

c)

C

63.

SiCl4 has what shape?

a)

trigonal planar

b)

pyramidal

c)

tetrahedral

d)

trigonal pyramidal

64.

3 atoms bonded and 0 lone pairs give what geometry?

a)

linear

b)

trigonal planar

c)

bent

d)

tetrahedral

e)

trigonal pyramidal

65.

3 atoms bonded and 1 lone pairs give what geometry

a)

true linear

b)

trigonal planar

c)

bent

d)

tetrahedral

e)

trigonal pyramidal

66.
Which of the following is the correct Lewis structure for the compound PBr3?
a)
structure A
b)
structure B
c)
structure C
d)
structure D
67.

Which of the following is the correct Lewis structure for Hydrogen Cyanide (HCN)

a)

A

b)

B

c)

C

d)

D

68.
Which of the following is the correct Lewis structure for CH2O?
a)
Option A
b)
Option B
c)
Option C
d)
Option D
69.

Which of the following molecules will have this molecular geometry?

a)

SF4

b)

CCl4

c)

SiO4

d)

CF2

70.
What is the correct formula for this molecule?
a)
Si4F
b)
SiF4
c)
SiF
d)
Si4F4
71.

Which of these molecules will have this molecular geometry?

a)

PCl5

b)

SF6

c)

CF5

d)

SnF4

72.
How many electrons should Beryllium have around its Lewis dot model?
a)
1
b)
2
c)
3
d)
4
73.
How many electrons should Sodium have around its Lewis dot model?
a)
1
b)
2
c)
3
d)
4
74.
How many electrons should Neon have around its Lewis dot model?
a)
5
b)
6
c)
7
d)
8
75.
How many electrons should Boron have around its Lewis dot model?
a)
1
b)
3
c)
5
d)
7
76.
 Lone electron pairs in a molecule...
a)
Never exist
b)
Are lost in space
c)
Creates an isotope
d)
Push the bonded atoms closer
77.
How many electrons should Phosphorus have around its Lewis dot model?
a)
2
b)
4
c)
5
d)
7
78.

In Lewis structures, pairs of electrons that are attached to only one atom are known as ___

a)

isoelectronic doublets

b)

free electrons

c)

lone pairs

d)

bonding pairs

79.

In Lewis structures, bonds are formed by pairs of valence electrons called ___

a)

structural electrons

b)

orbital electrons

c)

lone pairs

d)

bonding pairs

80.

How many valence electrons does carbon have?

a)

two

b)

three

c)

four

d)

six

81.
This could be the dot diagram of 
a)
Ne
b)
Si
c)
Al
d)
Be
82.
?
a)
Helium
b)
Hydrogen
c)
Argon
d)
Silver
83.

How many total valence electrons are participating in bonding in the molecule above?

a)

8

b)

4

c)

2

d)

3

84.

Which Lewis Dot Diagram would represent Chlorine?

a)
b)
c)
d)
85.

What element does this Lewis Dot Digram represent?

a)

Li

b)

Al

c)

C

d)

Be

86.

This could be the dot diagram of

a)

Si

b)

Br

c)

B

d)

S

87.

Which molecular geometry is correct for IF4 ?

a)
b)
c)
d)
88.

Which of the following molecules has this molecular geometry?

a)

PCl5

b)

SiO4

c)

SCl6

d)

CH4

89.

Which of the following is the correct LD Diagram for Hydrogen Cyanide, HCN?

a)

A

b)

B

c)

C

d)

D

90.

What charge does this atom form to get a full valence shell?

a)

6-

b)

6+

c)

8

d)

2-

e)

2+

91.

Which of these structures has one un-shared pairs of electrons?

a)
b)
c)
d)
92.

This could be the dot diagram of

a)

Mg

b)

Cl

c)

C

d)

O

93.
Which of the following is an acceptable Lewis structure for CH3Cl?
a)
Option A
b)
Option B
c)
Option C
d)
Option D
94.

This is a Bohr Diagram of Aluminum. How many valence electrons does Aluminum have?

a)

3

b)

4

c)

5

95.

Which is the correct molecular structure for carbon dioxide?

a)
b)
c)
d)
96.

By replacing the element symbol, this could be a diagram of which element?

a)

Li

b)

Al

c)

C

d)

Be

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