Free Printable Lewis Dot Diagrams and Chemical Bonds

Free Printable Worksheets

Worksheets

Lewis Dot Diagrams and Chemical Bonds

Total questions: 23

Worksheet time: 40mins

Name

Class

Date

1.

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

a)

5

b)

6

c)

7

d)

8

2.

How many valence electrons does chlorine (Cl) have?

a)

2

b)

5

c)

6

d)

7

3.

Which of these elements has 8 valence electrons?

a)

P

b)

Be

c)

O

d)

Ar

4.

This is the correct dot diagram for nitrogen (N)

a)

true

b)

false

5.

This is the correct dot diagram for sodium (Na)

a)

true

b)

false

6.

This could be the dot diagram of

a)

Ne

b)

H

c)

C

d)

F

7.

How many valence electrons are in Phosphorus?

a)

15

b)

4

c)

5

d)

31

8.

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

a)

5

b)

6

c)

7

d)

8

9.

How many electrons does Si contain? (click to see image)

a)

14

b)

28

c)

2

d)

None of these

10.

What is the correct formula for this molecule?

a)

NH

b)

N₃H

c)

NH₃

d)

NH₄

11.

How many extra electrons are in the Lewis structure of the phosphate ion, (PO₄)^3-?

a)

0

b)

2

c)

3

d)

4

12.

What is the correct formula for this molecule?

a)

Si₄F

b)

SiF₄

c)

SiF

d)

Si₄F₄

13.

What is the correct Lewis Dot Structure for ammonia NH3

a)

b)

c)

d)

14.

Which is the correct molecular structure for carbon dioxide?

a)

b)

c)

d)

15.

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

a)

8

b)

4

c)

2

d)

3

16.

CO₂ has how many lone pairs on its central atom?

a)

0

b)

1

c)

2

d)

3

e)

4

17.

Benzene is a petrochemicals and part of crude oil. It has a gasoline-like odour and is a colourless liquid. Benzene is highly toxic and carcinogenic in nature. The structures for benzene (C₆H₆) could best be described as (click on structure to enlarge)

a)

unrelated structures

b)

resonance structures

c)

isotopes of each other

d)

exactly the same as each other

e)

slightly different Ionic structures of each other

18.

Which of the following is the correct Lewis dot structure for the molecule fluorine (F₂)? (click on structure to enlarge)

a)

A

b)

B

c)

C

d)

D

19.

(NO₃) ^-

a)

Ionic

b)

Covalent

c)

Polyatomic Ion

d)

Metallic

20.

The octet rule means that all valence shells want to have the number......

a)

1

b)

9

c)

8

d)

16

21.

What bond is formed between 2 or more nonmetals sharing electrons?

a)

Covalent bond

b)

Ionic bond

c)

Metallic bond

22.

Which Lewis Dot Model drawing correctly shows an O₂ molecule?

a)

b)

c)

d)

23.

Is this molecule polar or nonpolar?

a)

polar

b)

nonpolar

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