Free Printable Counting atoms test.

1.

a)

element

b)

compound

c)

mixture of elements

d)

mixture of compounds

2.

a)

element

b)

compound

c)

mixture of elements and compounds

d)

mixture of compounds

3.

a)

element

b)

compound

c)

mixture of elements

d)

mixture of compounds and elements

4.

a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous Mixture

5.

a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous Mixture

6.

a)

Element

b)

Compound

c)

Homogeneous Mixture

d)

Heterogeneous Mixture

7.

2 or more different elements that are bonded together is called...

a)

A. element

b)

B. compound

c)

C. mixture

d)

D. solution

8.

A substance that contains only one type of atom is a(n)

a)

compound

b)

element

c)

heterogeneous mixture

d)

homogeneous mixture

9.

What is CO₂ and example of?

a)

element

b)

molecule

c)

compound

10.

Which of the following lists only elements?

a)

H₂O + OH, MgCl₂

b)

H₂O, KF, Ne

c)

KCl, Ag, Au

d)

K, Cl, N

11.

Mg

a)

Element

b)

Compound

c)

Mixture

12.

How many Hydrogen are in 4H₂O?

a)

6

b)

8

c)

2

d)

4

13.

2H₂ + O₂ ----> 2H₂O What is the product?

a)

------>

b)

2H₂O

c)

2H₂+ O₂

14.

2H₂ + O₂--------> 2H₂O What are the reactants?

a)

----->

b)

2H₂O

c)

2H₂ +O₂

15.

How many elements are in C₆H₁₂O₆?

a)

1

b)

2

c)

3

d)

4

16.

How many atoms are there TOTAL in:
H₂SO₄

a)

6

b)

5

c)

7

d)

3

17.

How many Sodium (Na) are in 6NaCl?

a)

1

b)

12

c)

6

18.

Which is the correct formula for:
three hydrogen (H)
one sulfur (S)
four oxygen (O)

a)

H₃SO₄

b)

HSO₄

c)

H₄S₃O

d)

H₂O

19.

How many Elements are in the compound C₂H₈O ?

a)

2

b)

1

c)

3

d)

0

20.

How many atoms of Hydrogen are in this compound

a)

1

b)

2

c)

3

d)

4

21.

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

a)

2

b)

3

c)

4

d)

5

22.

A subscript is the small number below a(n) ________ that tells the number of _______ of that element.

a)

element symbol; atoms

b)

atom; element symbol

c)

subscript; protons

d)

compound; elements

23.

What is a coefficient?

a)

The small number on the right of the chemical symbol.

b)

The large number to the left of a formula.

24.

Which side of a chemical equation is the reactant side?

a)

Left (before the yields sign)

b)

Right (after the yields sign)

25.

The law of conservation of matter states that

a)

chemical reactions change matter.

b)

in chemical reactions, the identity of reactants and products is conserved.

c)

atoms are neither created nor destroyed in chemical reactions.

d)

a chemical equation must be balanced.

26.

A pure substance that cannot be broken down into simpler substances.

a)

element

b)

compound

c)

molecule

d)

carbon dioxide

27.

The number of Na's in Na₂CO₃

a)

1

b)

2

c)

3

d)

6

28.

How many Aluminum are in Al₂O₃?

a)

3

b)

2

c)

5

29.

How many Chlorine are in MgCl₂?

a)

2

b)

1

c)

3

30.

How many atoms are there TOTAL in:
H₂SO₄

a)

6

b)

5

c)

7

d)

3

31.

How many TOTAL atoms are in this compound?
H₂C₃O₄N₅

a)

5

b)

14

c)

15

d)

19

32.

a capital letter or combination of a capital letter and a small letter that is used to represent an element is called a(n) ________

a)

chemical symbol

b)

element sign

33.

How many atoms of Carbon are in this formula? $C_{6\ }H_{12}O_6$

a)

6

b)

1

c)

12

34.

What elements are represented in this chemical formula? $Fe_2O_3$

a)

Iron, Oxygen

b)

Francium, Europium, Oxygen

c)

Ferrium, Oxygen

d)

Berylium, Oxygen

35.

What is the total number of atoms in this formula? $H_2O_2$

a)

2

b)

4

c)

3

36.

How many more atoms of Oxygen than than Magnesium are in this formula? $MgSO_4$

a)

4

b)

3

c)

2

d)

6

37.

Which of the following is a molecule of a compound?

a)

$H_2$

b)

$Cl_2$

c)

$H_2O$

d)

$F_2$

38.

Which element has the greatest number of atoms? $AgNO_3$

a)

Silver

b)

Gold

c)

Nitrogen

d)

Oxygen

39.

How many elements are in this chemical formula? $NaHCO_3$

a)

1

b)

2

c)

3

d)

4

40.

If there is no subscript, there is ______ atom(s) of that element.

a)

0

b)

2

c)

only 1

d)

1 million

41.

What is the left part of a chemical equation called?
H_{2 +}O → H₂O

a)

Reactants

b)

Products

c)

Yields

d)

Chemical Equation

42.

2H₂ + O₂ ----> 2H₂O What is the product?

a)

------>

b)

2H₂O

c)

2H₂+ O₂

43.

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

a)

A Exponent

b)

The Coefficient

c)

A Molecule

d)

The Subscript

44.

This appears on the left side of a chemical formula, and represents how many molecules there are.

a)

An Atom

b)

The Subscript

c)

A Molecule

d)

The Coefficient

45.

If there are 4 H atoms on the reactant side, how many H atoms will be on the product side?

a)

2

b)

4

c)

6

d)

You need more information to answer this question

46.

How many O's are in Al₂(SO₄)₃

a)

4

b)

12

c)

7

d)

24

47.

Number of N in (NH₄)₂CrO₄

a)

1

b)

2

c)

8

d)

16

48.

How many elements are present in this compound?
Mg₂As₃COHNi₂

a)

2

b)

4

c)

6

d)

10

49.

How many Magnesium are in 10MgCl₂?

a)

10

b)

5

c)

20

50.

How many Oxygen atoms are in Al₂(SO₄)₃?

a)

4

b)

12

c)

7

d)

24

51.

How many Hydrogen atoms in 3(NH₄)₂CrO₄?

a)

4

b)

2

c)

8

d)

24

52.

How many Nitrogen atoms are in the in H₂C₃O₄N₅?

a)

2

b)

3

c)

4

d)

5

53.

How many atoms of carbon (C) are in C₆H₁₂O₆?

a)

3

b)

6

c)

12

d)

24

54.

How many Aluminum atoms are in Al₂O₃?

a)

3

b)

2

c)

5

d)

1

55.

Subatomic particles with a negative charge

a)

Electrons

b)

Neutrons

c)

Protons

d)

Quarks

56.

Subatomic particles with a positive charge

a)

neutrons

b)

atomic mass

c)

protons

d)

isotopes

57.

What is the symbol for hydrogen?

a)

Hy

b)

H

c)

He

d)

Ho

58.

What is the symbol for carbon?

a)

Ca

b)

Cr

c)

Co

d)

C

59.

What is the symbol for nitrogen?

a)

N

b)

Ni

c)

Ne

d)

No

60.

What is the symbol for oxygen?

a)

Ox

b)

O

c)

Og

d)

Oh no

61.

What does the C represent?

a)

atomic mass

b)

atomic number

c)

element name

d)

chemical symbol

62.

What does the 6 represent?

a)

Atomic mass

b)

atomic number

c)

chemical symbol

d)

element name

63.

Which element has the symbol He?

a)

Hydrogen

b)

Helium

c)

Mercury

d)

Helenium

64.

What is the symbol for the element Potassium?

a)

P

b)

Po

c)

K

d)

Pm

65.

Water compound

a)

NaCl

b)

H2O

c)

Protein

d)

CaCO

66.

What is this element...Au

a)

Iron

b)

Titanium

c)

Gold

d)

Flourine

Counting atoms test.

Total questions: 66

Worksheet time: 35mins

Similar Resources on Wayground