Free Printable Lewis Diagrams Practice

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.

How many valence electrons are in Phosphorus?

a)

15

b)

4

c)

5

d)

31

5.

How many electrons does each line indicate are shared?

a)

1

b)

2

c)

3

d)

4

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.

Which of the following is the correct Lewis structure for water?

a)

A

b)

B

c)

C

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.

Three pairs of electrons are shared in a

a)

Single bond

b)

Double bond

c)

Triple bond

12.

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

a)

Li

b)

Al

c)

C

d)

Be

13.

How many valence electrons does chlorine have?

a)

1

b)

6

c)

7

d)

8

14.

What is the symbol for chlorine?

a)

Cl

b)

H

c)

C

d)

O

15.

How many valence electrons does hydrogen have?

a)

1

b)

2

c)

6

d)

8

16.

How many valence electrons does carbon have?

a)

1

b)

2

c)

4

d)

8

17.

How many valence electrons does oxygen have?

a)

1

b)

2

c)

4

d)

6

18.

What is the simplest molecule?

a)

Hydrogen

b)

Oxygen

c)

Carbon

d)

Chlorine

19.

How many shared electrons are represented by a single bond?

a)

1

b)

2

c)

4

d)

6

20.

How many shared electrons are represented by a double bond?

a)

1

b)

2

c)

4

d)

6

21.

How many valence electrons does sulfur trioxide have?

a)

6

b)

8

c)

18

d)

24

22.

What is the central atom in sulfur trioxide?

a)

Sulfur

b)

Oxygen

c)

Hydrogen

d)

Carbon

23.

How many valence electrons does the central atom in sulfur trioxide have?

a)

6

b)

8

c)

18

d)

24

24.

NH₃ has how many lone pairs (aka unshared pairs of electrons)?

a)

0

b)

1

c)

2

d)

3

25.

This could be the dot diagram of

a)

Mg

b)

Cl

c)

C

d)

O

26.

This is a correct dot diagram for neon (Ne)

a)

true

b)

false

27.

This could be the dot diagram of

a)

Mg

b)

Cl

c)

C

d)

O

28.

How many electrons should sodium, atomic number 11, have around its Lewis dot model?

a)

1

b)

2

c)

3

d)

4

29.

How many valence electrons does Aluminum Have?

a)

1 Valence electron

b)

2 Valence electron

c)

3 Valence electron

d)

4 Valence electron

e)

5 Valence electron

30.

How would you draw a Lewis dot diagram for Magnesium?

a)

b)

c)

d)

31.

Which of the following shows a correct Lewis dot structure?

a)

b)

c)

d)

32.

Which of these is correct?

a)

b)

c)

33.

What is the goal of the Lewis Dot Structure?

a)

To determine the electron position.

b)

To show the element's valence electrons & bonding capabilities.

c)

To find the atomic mass of an element.

d)

To search for the number of electrons in an individual atom.

34.

How many valence electrons should Lithium have in its Lewis dot model?

a)

1

b)

2

c)

3

d)

4

35.

How many valence electrons should Oxygen have in its Lewis dot model?

a)

5

b)

6

c)

7

d)

8

36.

How many valence electrons should Magnesium have in its Lewis dot model?

a)

1

b)

2

c)

3

d)

4

37.

This is a correct dot diagram for carbon (C)

a)

true

b)

false

38.

How many electrons should Boron have around its Lewis dot model?

a)

1

b)

2

c)

3

d)

4

39.

What's a valence electron?

a)

electrons in the second energy level

b)

electrons in the outermost energy level

c)

the atomic number

d)

electrons in the first level

40.

What is the total number of valence electrons in CO2?

a)

16

b)

12

c)

4

d)

8

41.

Which group in the periodic table has elements with 7 valence electrons?

a)

Group 17

b)

Group 13

c)

Group 15

d)

Group 1

42.

In a Lewis structure, where does hydrogen usually go?

a)

In the center

b)

Does not appear

c)

On the outside

d)

Varies with compound

43.

H₂O has how many covalent bonds?

a)

0

b)

1

c)

2

d)

3

44.

What is the formula of this molecule?

a)

CH

b)

HC₄

c)

CH₄

d)

C₄H₄

Lewis Diagrams Practice

Total questions: 44

Worksheet time: 1hrs 5mins

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