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Covalent Bonding and Lewis Structures

Total questions: 21

Worksheet time: 2hrs 43mins

Name
Class
Date
1.

What two types of atoms make a covalent bond?

a)

2 non-metals

b)

1 metal and 1 non-metal

c)

2 metals

2.

The number of covalent bonds group 17 can form

a)

1

b)

2

c)

3

d)

4

3.

The number of covalent bonds group 16 can form

a)

1

b)

2

c)

3

d)

4

4.
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
5.

Covalent bonds

a)

share electrons

b)
transfer electrons
c)
contain a sea of electrons
d)
conduct electricity
6.
According to the octet rule most elements need _______ valence electrons.
a)
2
b)
8
c)
6
d)
18
7.

Hydrogen is an exception to the octet rule. Hydrogen (H) needs _____ electrons in its outer energy level to be stable.

a)

4

b)

6

c)

8

d)

2

8.

A covalent bond is

a)

a bond that shares electrons metallicaly

b)

A bond that shares electrons between non metals

c)

Metalloids bonding

d)

metals and nonmetals bonding

9.

When drawing Lewis structures, only __________ electrons are used.

a)

inner shell

b)

core

c)

valence

d)

stable

10.
What is the correct formula for this molecule?
a)
Si4F
b)
SiF4
c)
SiF
d)
Si4F4
11.
 A lone pair is defined as
a)
A pair of bonding electrons
b)
One non-bonding electron
c)
A pair of non-bonding electrons
d)
A pair of electrons on the central atom
12.

15. 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 type of bond is this?
a)
ionic
b)
covalent
14.
This picture shows a...
a)
Ionic Bond
b)
Covalent Bond
c)
Both bonds
d)
Neither bond
15.

Which of the following is the correct Lewis dot structure for a molecule of fluorine, F2?

a)
b)
c)
d)
16.

Which of the following is a valid Lewis structure for CH3Cl?

a)

b)

c)

d)

17.

Which of the following is a valid Lewis structure for hydrogen cyanide, HCN?

a)
b)
c)
d)
18.

Click on the portion of this image that shows a single bond.

19.
The lewis dot structure for a compound is shown. Which element could be represented by element X?
a)
Bromine (Br)
b)
Sulfur (S)
c)
Nitrogen (N)
d)
Silicon (Si)
20.

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

a)

There are too many bonds around the Si atom.

b)

The structure only required two double bonds to fulfill the octet.

c)

The Structure is missing a triple bond.

d)

Each chlorine only has 6 electrons surrounding it.

21.

Match the following

a)

Ionic

1.

electrons are transfered

b)

Covalent

2.

Electrons are shared

c)

Compound

3.

Two or more chemically combined elements