Free Printable Counting Atoms Quiz

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Worksheets

Counting Atoms Quiz

Total questions: 37

Worksheet time: 2hrs 44mins

Name

Class

Date

1.

How many atoms are in one CH₄ molecule?

a)

2

b)

3

c)

4

d)

5

2.

How many atoms are in one molecule of C₆H₁₂O₆?

a)

6

b)

12

c)

18

d)

24

3.

How many atoms of C are in one molecule of C₆H₁₂O₆?

a)

6

b)

12

c)

18

d)

24

4.

How many atoms are in the formula unit Al(OH)₃?

a)

3 atoms

b)

6 atoms

c)

7 atoms

d)

8 atoms

5.

How many total atoms are in the formula unit (NH₄)₂O?

a)

3 atoms

b)

7 atoms

c)

10 atoms

d)

11 atoms

6.

How many atoms of H are in the formula unit (NH₄)₂O?

a)

1 atom

b)

4 atoms

c)

8 atoms

d)

11 atoms

7.

How many atoms of H are in the formula unit Be(C₂H₃O₂)₂?

a)

2 atoms

b)

3 atoms

c)

5 atoms

d)

6 atoms

8.

How many atoms of Hydrogen are in this compound?

a)

1

b)

2

c)

3

d)

4

9.

KMnO_{4
How many total atoms are in this compound?}

a)

1

b)

3

c)

6

d)

8

10.

The formula for sodium nitrate is NaNO3.

How many total atoms make up this compound? _____

a)

5

b)

4

c)

3

d)

2

11.

Which of these molecules have the same number of Carbon Atoms?

a)

Substance 1 and 4

b)

Substance 2

c)

Substance 1 and 3

d)

Substance 2 and 4

12.

Which of these formulas contain equal numbers of nitrogen atoms?

a)

Formulas I and III

b)

Formulas I and IV

c)

Formulas I, II and V

d)

Formulas II and III

13.

How many nitrogen atoms in
Mg(NO₃)₂

a)

1

b)

2

c)

3

d)

6

14.

How many magnesium atoms in
Mg(NO₃)₂

a)

1

b)

2

c)

3

d)

6

15.

How many atoms are there TOTAL in:
H₂SO₄

a)

6

b)

5

c)

7

d)

3

16.

How many total atoms are in the element Carbon in this compound?
H₂C₃O₄N₅

a)

2

b)

3

c)

4

d)

5

17.

$C_6H_{12}O_6$

How many elements make up this chemical formula?

(a)

18.

$CO_2$

How many elements make up this chemical formula?

(a)

19.

$Sn\left(NO_3\right)_2$

How many elements make up this chemical formula?

(a)

20.

$\left(NH_4\right)_2Cr_2O_7$

How many elements make up this chemical formula?

(a)

21.

$Sn\left(NO_3\right)_2$

How many atoms of Tin are there?

(a)

22.

$2\ Pb\left(NO_3\right)_2$

How many elements make up this chemical formula?

(a)

23.

Count the atoms

$2HCO_3$

_Carbon: (a)

_Hydrogen: (b)

_Oxygen: (c)

Choose from the below words

2

6

15

8

4

24.

How many hydrogen atoms are in this chemical formula:

a)

4 hydrogen atoms

b)

1 hydrogen atom

c)

2 hydrogen atoms

d)

3 hydrogen atoms

25.

How many TOTAL ATOMS are in the chemical formula shown?

a)

8

b)

4

c)

5

d)

6

26.

Number of H in 3(NH₄)₂CrO₄:

a)

4

b)

2

c)

8

d)

24

27.

Label the parts of the chemical formula

a)Coefficient

b)Subscript

c)Element

d)Compound

1

2

3

4

1)

2)

3)

4)

28.

How many oxygen (O) are in C₂H₄(OH)₂ ?

29.

How many atoms of sodium (Na) are in one molecule of baking soda?

a)

1

b)

2

c)

3

d)

4

30.

This is used to represent the number of each atom being represented.

a)

A Exponent

b)

The Coefficient

c)

A Molecule

d)

The Subscript

31.

In a molecule of 5BaC₄H₄O₆

Ba = (a) C = (b) H = (c) O = (d)

Choose from the below words

5

20

30

4

6

2

1

22

35

25

32.

In a molecule of 7C₂S₂

C = (a) S = (b)

Choose from the below words

14

9

2

21

7

28

15

33.

How many total atoms are in Na₂CO₃?

34.

What is the total number of atoms in an ammonia (NH₃) molecule?

a)

1

b)

2

c)

3

d)

4

35.

What is the chemical formula for this molecule?

a)

H₁F₂

b)

H₁F₁

c)

HF

d)

HeF

36.

The 3 in the above formula is called a _____________.

a)

A coefficient

b)

B subscript

c)

C superscript

d)

D mininumber

37.

Coefficients in chemical formulas

a)

A Multiply only what is in parenthesis

b)

B Multiply everything

c)

C add to the subscripts if it has them

d)

D do nothing

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