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Worksheets

Lewis Structures

Total questions: 17

Worksheet time: 1hrs 1mins

Name
Class
Date
1.
According to the octet rule most elements need _______ valence electrons.
a)
2
b)
8
c)
6
d)
18
2.
Hydrogen needs _____ electrons in its valence shell to be stable.
a)
4
b)
6
c)
8
d)
2
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.
When writing Lewis Structures, only __________ electrons are used.
a)
Inner shell
b)
Core 
c)
Valence
d)
Stable
7.

What is the correct Lewis Dot Structure for ammonia NH3

a)
b)
c)
d)
8.

Which is the correct molecular structure for carbon dioxide?

a)
b)
c)
d)
9.

Is this the correct structure for CH2O?

a)

Yes

b)

No

10.
Which of the following is an acceptable Lewis structure for CH3Cl?
a)
Option A
b)
Option B
c)
Option C
d)
Option D
11.

Which of the following compounds has only single bonds?

a)

I only

b)

II only

c)

III only

d)

I and III

e)

III and IV

12.

NH3 has how many lone pairs?

a)

0

b)

1

c)

2

d)

3

13.

CCl4 has how many double bonds?

a)

0

b)

1

c)

2

d)

3

14.

In HCN (Carbon is usually the central atom) what kind of bond is between the C and N

a)

Single

b)

Double

c)

Triple

15.

How many valence electrons are in the compound N2O?

(a)  

16.

Why is this Lewis Structure incorrect? Select all that appy.

a)

There should be a single bond between H and C.

b)

There should be a triple bond between C and N.

c)

Carbon has too many bonds around it.

d)

Hydrogen needs more electrons.

17.

Why is this Lewis Structure incorrect? Choose all that apply.

a)

There are too many bonds around Si.

b)

There should only be single bonds in this Lewis Structure.

c)

The Structure is missing a triple bond.

d)

Chlorine only has 6 electrons surrounding it.