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Lewis Dot Structure Covalent Bonds

Total questions: 21

Worksheet time: 23mins

Name
Class
Date
1.

What is the correct Lewis Dot Structure for ammonia NH3

a)
b)
c)
d)
2.

Which is the correct molecular structure for carbon dioxide CO2?

a)
b)
c)
d)
3.

CCl4 has how many double bonds?

a)

0

b)

1

c)

2

d)

3

4.

In HCN how many total electrons will there be in the drawing? (Hint: A column)

a)

14

b)

18

c)

10

d)

4

5.
This is a correct dot diagram for oxygen (O)
a)
true
b)
false
6.
This is a correct dot diagram for fluorine (F)
a)
true
b)
false
7.

Which Lewis Dot Model drawing correctly shows an O2 molecule?

a)
b)
c)
d)
8.
According to the octet rule most elements need _______ valence electrons.
a)
2
b)
8
c)
6
d)
18
9.

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

a)

8

b)

4

c)

2

d)

3

10.
What is the correct formula for this molecule?
a)
Si4F
b)
SiF4
c)
SiF
d)
Si4F4
11.

Covalent compounds

a)

contain a sea of electrons

b)

share electrons

c)

transfer electrons

d)

conduct electricity

12.

What is a valence electron?

a)

an electron that is found in the outermost shell of an atom.

b)

an electron found in the innermost shell of an atom.

c)

an electron found in the middle shell.

13.

What is the number of valence electrons for Neon and the other Noble Gases?

a)

5

b)

6

c)

7

d)

8

14.
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
15.
When writing Lewis Structures, only __________ electrons are used.
a)
Inner shell
b)
Core 
c)
Valence
d)
Stable
16.

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

a)

Single

b)

Double

c)

Triple

17.

CHCl3 has how many double bonds?

a)

0

b)

1

c)

2

d)

3

18.
Which of the following is the correct Lewis structure for water?
a)
A
b)
B
c)
C
19.
Why do elements bond?
a)
To be friends
b)
To create a new element
c)
To become stable
20.
The chemical formula shows one carbon atom bonded to __________ oxygen atoms.
a)
one
b)
two
c)
three
d)
four
21.

What is the formula of this molecule?

a)

CH

b)

HC4

c)

CH4

d)

C4H4