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Lewis Structures

Total questions: 40

Worksheet time: 1hrs 9mins

Name
Class
Date
1.

CH2O has which of the following?

a)

Multiple double bonds

b)

Multiple single bonds

c)

One double bond

d)

One single bond

e)

One lone pair

2.

When you have C-H atoms, what is the polarity?

a)

nonpolar

b)

polar

c)

ionic

3.

Is this molecule polar or non-polar?

a)

Polar

b)

Non-polar

4.

When you have Mn-O atoms, what is the polarity?

a)

nonpolar

b)

polar

c)

ionic

5.
According to the octet rule most elements need _______ valence electrons.
a)
2
b)
8
c)
6
d)
18
6.

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

a)

8

b)

4

c)

2

d)

3

7.

Is this molecule polar or non-polar?

a)

Non-polar

b)

Polar

8.

The following diatomic molecules are non-polar and only experience London Dispersion forces. Identify the molecule with the strongest London Dispersion forces.

a)
F2
b)
Br2
c)
Cl2
d)
I2
9.

Identify the correct Lewis Dot Structure for ammonia, NH3

a)
b)
c)
d)
10.

Identify the strongest intermolecular force for water, H2O

a)

Van der Waals Forces

b)

Hydrogen bonds

c)

Dispersion Forces

11.

The image shows two water molecules. Briefly explain why oxygen has a partial negative (δ-) and hydrogen a partial positive sign (δ+).  

a)

Oxygen is more reactive than hydrogen and will therefore have a partial negative charge.

b)

Oxygen is less electronegative than hydrogen, so electrons are pulled away from oxygen.

c)

Oxygen is more electronegative than hydrogen, so electrons are pulled towards oxygen.

d)

Hydrogen is more reactive than oxygen and will therefore have a partial positive charge.

12.

Is this molecule polar or nonpolar?

a)

polar

b)

nonpolar

13.

Identify ALL intermolecular forces experienced by a sample of water, H2O

a)

Van der Waals Forces

b)

Hydrogen bonds

c)

Dispersion Forces

d)

All of the above

14.

If electrons are NOT shared equally between nonmetal atoms, then the bond is....

a)

Non-polar covalent

b)

Ionic

c)

Non-polar ionic

d)

Polar covalent

15.

When you have Be-F atoms, what is the polarity?

a)

nonpolar

b)

polar

c)

ionic

16.

Which of the following is the correct Lewis structure for a molecule fluorine?

a)

A

b)

B

c)

C

d)

D

17.

Identify the molecule that could potentially experience hydrogen bonding.

a)

CBr4

b)

NO2

c)

H2S

d)

NH3

18.

When you have F-F atoms, what is the polarity?

a)

nonpolar

b)

polar

c)

ionic

19.

Determine the type of bond in a hydrogen molecule (H2).

a)

Double covalent

b)

Single covalent

c)

Ionic

d)

Triple covalent

20.
Hydrogen needs _____ electrons in its valence shell to be stable.
a)
4
b)
6
c)
8
d)
2
21.
What molecule could this be? 
a)
BF3
b)
CH4
c)
H2O
d)
CO2
22.
Which of the following is the correct Lewis structure for CH2O?
a)
Option A
b)
Option B
c)
Option C
d)
Option D
23.
This is the correct dot diagram for nitrogen (N)
a)
true
b)
false
24.

Metal and nonmetal atoms form which kind of bond?

a)

Polar covalent

b)

Ionic

c)

Non-polar covalent

d)

Metallic

25.

Is this molecule polar or nonpolar?

a)

polar

b)

nonpolar

26.

Which is the correct molecular structure for carbon dioxide?

a)
b)
c)
d)
27.
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
28.

Identify the correct Lewis structure for the compound PBr3

a)
structure A
b)
structure B
c)
structure C
d)
structure D
29.
When writing Lewis Structures, only __________ electrons are used.
a)
Inner shell
b)
Core 
c)
Valence
d)
Stable
30.

When you have Si-O atoms, what is the polarity?

a)

nonpolar

b)

polar

c)

ionic

31.
Which of the following is the correct Lewis dot structure for the molecule fluorine (F2)?
a)
A
b)
B
c)
C
d)
D
32.

How many total valence electrons are non-bonding in the molecule pictured?

a)

8

b)

4

c)

2

d)

3

33.
According to the octet rule most elements need _______ valence electrons.
a)
2
b)
8
c)
6
d)
18
34.
Which of the following is an acceptable Lewis structure for CH3Cl?
a)
Option A
b)
Option B
c)
Option C
d)
Option D
35.

When you have Zn-F atoms, what is the polarity?

a)

nonpolar

b)

polar

c)

ionic

36.

When drawing Lewis Structures, only __________ electrons are used.

a)
Inner shell
b)
Core 
c)
Valence
d)
Stable
37.
This is the correct dot diagram for sodium (Na)
a)
true
b)
false
38.

When you have H-Cl atoms, what is the polarity?

a)

nonpolar

b)

polar

c)

ionic

39.

If electrons are shared equally between nonmetal atoms, then the bond is....

a)

Non-polar covalent

b)

Ionic

c)

Non-polar ionic

d)

Polar covalent

40.
Each line in a Lewis Structure represents __________ electron(s).
a)
3
b)
2
c)
1
d)
4

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