Free Printable Counting Atoms in Chemical Formulas

1.

Identify the types of atoms present in the chemical formula $H_2O$ .

a)

Hydrogen and Oxygen

b)

Hydrogen and Nitrogen

c)

Oxygen and Nitrogen

d)

Hydrogen and Carbon

2.

How many hydrogen atoms are present in the chemical formula $C_6H_{12}O_6$ ?

a)

6

b)

12

c)

18

d)

24

3.

In the chemical formula $2NaCl$ , how many sodium (Na) atoms are there?

a)

1

b)

2

c)

3

d)

4

4.

What is the total number of oxygen atoms in the formula $3CO_2$ ?

a)

3

b)

6

c)

9

d)

12

5.

Identify the types of atoms present in the chemical formula $CH_4$ .

a)

Carbon and Hydrogen

b)

Carbon and Oxygen

c)

Hydrogen and Oxygen

d)

Carbon and Nitrogen

6.

How many chlorine atoms are present in the chemical formula $CaCl_2$ ?

a)

1

b)

2

c)

3

d)

4

7.

In the chemical formula $4NH_3$ , how many nitrogen (N) atoms are there?

a)

1

b)

2

c)

3

d)

4

8.

What is the total number of hydrogen atoms in the formula $5H_2SO_4$ ?

a)

5

b)

10

c)

15

d)

20

9.

Identify the types of atoms present in the chemical formula $KNO_3$ .

a)

Potassium, Nitrogen, and Oxygen

b)

Potassium, Nitrogen, and Hydrogen

c)

Potassium, Carbon, and Oxygen

d)

Potassium, Carbon, and Hydrogen

10.

How many carbon atoms are present in the chemical formula $C_2H_5OH$ ?

a)

1

b)

2

c)

3

d)

4

11.

In the chemical formula $6H_2O$ , how many oxygen (O) atoms are there?

a)

6

b)

12

c)

18

d)

24

12.

What is the total number of nitrogen atoms in the formula $2N_2O$ ?

a)

2

b)

3

c)

4

d)

5

13.

Identify the types of atoms present in the chemical formula $H_2SO_4$ .

a)

Hydrogen, Sulfur, and Oxygen

b)

Hydrogen, Sulfur, and Nitrogen

c)

Hydrogen, Carbon, and Oxygen

d)

Hydrogen, Carbon, and Nitrogen

14.

How many sulfur atoms are present in the chemical formula $3SO_2$ ?

a)

1

b)

2

c)

3

d)

4

15.

In the chemical formula $2C_2H_6$ , how many hydrogen (H) atoms are there?

a)

6

b)

8

c)

10

d)

12

Counting Atoms in Chemical Formulas

Total questions: 15

Worksheet time: 8mins

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