Free Printable Chemistry Review

1.

How can blocks be used to represent atoms?

a)

By arranging blocks in a specific way to represent the atomic structure.

b)

By stacking blocks randomly to represent the atomic structure.

c)

By using different colored blocks to represent different elements.

d)

By arranging blocks in a specific way to represent the molecular structure.

2.

If a compound has 3 oxygen atoms and 2 hydrogen atoms, what is the total number of atoms in the compound?

a)

6

b)

4

c)

7

d)

5

3.

What is the term used to identify atoms in a compound?

a)

atomic number

b)

chemical formula

c)

molecular structure

d)

element symbol

4.

In a compound with the formula H2O, how many hydrogen atoms are present?

a)

1

b)

3

c)

4

d)

2

5.

If a compound has 4 carbon atoms and 10 oxygen atoms, what is the total number of atoms in the compound?

a)

6

b)

8

c)

12

d)

14

6.

In a compound with the formula CO2, how many oxygen atoms are present?

a)

1

b)

3

c)

4

d)

2

7.

Which chemical formula correctly displays 1 atom of Ni, and 2 atoms of F?

a)

niF2

b)

NIF₂

c)

Ni₁F₂

d)

NiF₂

8.

What does the subscript in a chemical formula tell you?

a)

How many molecules are present

b)

How many atoms are present

c)

How many elements are present

d)

How many neutrons are present

9.

How many elements are in this chemical formula?

HCl

a)

1

b)

2

c)

3

d)

4

10.

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

a)

6

b)

1

c)

12

11.

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

a)

2

b)

4

c)

3

12.

Which chemical formula correctly displays 1 atom of Ni, and 2 atoms of F?

a)

niF2

b)

NIF₂

c)

Ni₁F₂

d)

NiF₂

13.

What is the total number of atoms in this chemical formula? $C_8H_3NaBr_{12}$

a)

18

b)

12

c)

25

d)

24

14.

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

a)

Ag

b)

Au

c)

N

d)

O

15.

Molecules that are made of more than one type of atom are called?

a)

Molecules

b)

Elements

c)

Mixtures

d)

Compounds

16.

How many different types of elements are in this chemical formula? $NaHCO_3$

a)

1

b)

2

c)

3

d)

4

17.

How many H atoms are in 4H₂O?

a)

6

b)

8

c)

2

d)

4

18.

How many different types of elements are in C₆H₁₂O₆?

a)

1

b)

2

c)

3

d)

4

19.

How many atoms are there TOTAL in:
H₂SO₄

a)

6

b)

5

c)

7

d)

3

20.

How many Sodium (Na) are in 6NaCl?

a)

1

b)

12

c)

6

21.

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

a)

H₃SO₄

b)

HSO₄

c)

H₄S₃O

d)

H₂O

22.

How many different types of Elements are in the compound C₂H₈O ?

a)

2

b)

1

c)

3

d)

0

23.

How many atoms of H are in this compound

a)

1

b)

2

c)

3

d)

4

24.

How many C atoms are in this compound?

H₂C₃O₄N₅

a)

2

b)

3

c)

4

d)

5

25.

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

26.

Number of C's in 2Na₂CO₃

a)

1

b)

2

c)

3

d)

5

27.

The number of Na's in Na₂CO₃

a)

1

b)

2

c)

3

d)

6

28.

What are the subatomic particles?

a)

Protons, Electrons, Neutrons

b)

Molecules, and atoms

c)

Electrons, Protons, Nucleus

d)

Nucleus, and Electrons

29.

What is this subatomic particle that has positive charge?

a)

Electron

b)

Neutron

c)

Proton

d)

Megatron

30.

What is this subatomic particle that has negative charge?

a)

Electron

b)

Neutron

c)

Proton

d)

Megatron

31.

What is this subatomic particle that has no charge?

a)

Electron

b)

Neutron

c)

Proton

d)

Megatron

32.

What is the small, DENSE REGION consisting of protons and neutrons at the CENTER of an atom?

a)

Molecules

b)

Nucleus

c)

Subatomic particle

d)

Atoms

33.

True or False - Protons and Neutrons have about the same mass.

a)

True - They have about the same mass

b)

False - They do not have about the same mass

34.

Which two subatomic particles make up the nucleus of an atom?

a)

Protons and Electrons

b)

Neutrons and Electrons

c)

Electrons and Protons

d)

Protons and Neutrons

35.

Where are the Electrons found in the structure of an atom?

a)

In the nucleus

b)

In spaces around the nucleus

36.

Which of the following is MOST reactive?

a)

Lithium

b)

Lead

c)

Tin

d)

Copper

37.

Which metal is more reactive than calcium?

a)

magnesium

b)

potassium

c)

silver

d)

aluminum

38.

Which two groups on the Periodic Table are the MOST reactive?

a)

Group 1 and Group 17

b)

Group 2 and Group 16

c)

Group 13 and Group 15

d)

Group 17 and Group 18

39.

How many valence electrons are elements trying to reach in their outer shells?

a)

1

b)

2

c)

5

d)

8

40.

What determines the reactivity of an element?

a)

Size of its nucleus

b)

Number of total electrons

c)

Number of valence electrons

d)

Number of shells

41.

In the chemical formula $C_{12}H_{22}O_{11}$ , how many elements are there?

a)

1

b)

2

c)

3

d)

4

42.

Jin bought a heat pack that weighs 15 g. He shook it so it would release heat to warm his hands. The release of heat indicates a chemical reaction took place in a closed system. What would be the mass of the heat pack after the chemical reaction?

a)

5 g

b)

10 g

c)

12 g

d)

15 g

43.

In the chemical formula $C_{12}H_{22}O_{11}$ , how many elements are there?

a)

1

b)

2

c)

3

d)

4

44.

In the chemical formula $C_{12}H_{22}O_{11}$ , how many C atoms are there?

a)

12

b)

22

c)

11

d)

45

45.

In the chemical formula $C_{12}H_{22}O_{11}$ , how many O atoms are there?

a)

12

b)

22

c)

11

d)

45

46.

In the chemical formula $C_{12}H_{22}O_{11}$ , how many H atoms are there?

a)

12

b)

22

c)

11

d)

45

47.

What is the TOTAL number of atoms in the chemical formula $C_{12}H_{22}O_{11}$ ?

a)

12

b)

22

c)

11

d)

45

48.

Which of the following substances CANNOT be broken down into simpler substance? ?

a)

$Na$

b)

$H_2O$

c)

$C_6H_{12}O_6$

d)

$CO$

49.

How does a balanced chemical equation satisfy the Law of Conservation of Mass?

a)

During a chemical reaction, matter is destroyed.

b)

During a chemical reaction, the total number of atoms increases.

c)

During a chemical reaction, one or more new substances are formed.

d)

During a chemical reaction, the total amount of matter stays the same.

50.

What happens to the total mass of the substances after a chemical reaction?

a)

It decreases.

b)

It increases.

c)

It remains the same.

d)

It increases then decreases.

51.

In a chemical reaction, the number of atoms in the products will always equal which amount?

a)

the number of atoms in the reactants

b)

half of the number of atoms in the reactants

c)

twice the number of the atoms in the reactants

d)

thrice the number of the atoms in the reactants

52.

Jin bought a heat pack that weighs 15 g. He shook it so it would release heat to warm his hands. The release of heat indicates a chemical reaction took place in a closed system. What would be the mass of the heat pack after the chemical reaction?

a)

5 g

b)

10 g

c)

12 g

d)

15 g

53.

The chemical formula for baking soda is $NaHCO_3$ . How many O atoms does it have?

a)

1

b)

2

c)

3

d)

4

54.

Matter can not be created nor destroyed: it can only be

a)

Destroyed a little bit

b)

Invisible

c)

Transformed, changed

d)

None of the above

55.

The number to the lower side of an element is a

a)

Subscript

b)

Superscript

c)

Coefficient

d)

Charge

56.

The number in front of a compound or element is a

a)

Subscript

b)

Coefficient

c)

Superscript

d)

Charge

57.

A chemical reaction is balanced when

a)

both sides have the same elements

b)

Both sides have the same number of atoms

c)

Same subscripts

d)

Same coefficients

58.

If reaction starts with 20g of reactants it should produce

a)

a total of 40g of products

b)

a total of 10g of products

c)

a total of 80 g of products

d)

a total of 20g of products

59.

What is the Law of Conservation of mass?

a)

Mass is created in a chemical reaction

b)

Mass is created in a physical change

c)

New chemicals formed from a chemical reaction have a larger overall mass than the original reactants

d)

Mass is never created or destroyed

60.

Maria fills a bowl with 200 g of water. She puts the bowl of water in the freezer, and the water freezes. Which will most likely be the mass of the frozen water?

a)

50 g

b)

100 g

c)

200 g

d)

400 g

61.

How many atoms do you have in the compound 2MgCl₂?

a)

2 atoms

b)

4 atoms

c)

6 atoms

d)

8 atoms

62.

How many Ca (Calcium) atoms are found in Ca(OH)_2?

a)

5 atoms

b)

3 atoms

c)

2 atoms

d)

1 atom

63.

a)

Periods

b)

Groups

64.

a)

Periods

b)

Groups

65.

a)

Periods

b)

Groups

66.

a)

Periods

b)

Groups

67.

a)

energy levels

b)

valence electrons

c)

protons

d)

neutrons

68.

a)

energy levels

b)

valence electrons

c)

protons

d)

neutrons

69.

a)

Same group

b)

Same period

70.

a)

Group 1

b)

Group 17

c)

Group 2

d)

Group 18

71.

a)

Group 1

b)

Group 17

c)

Group 18

d)

Group 2

72.

a)

Group 1

b)

Group 17

c)

Group 18

d)

Group 2

73.

a)

Metals

b)

Nonmetals

c)

Metalloids

74.

a)

Metals

b)

Nonmetals

c)

Metalloids

75.

a)

Metals

b)

Nonmetals

c)

Metalloids

76.

a)

Metals

b)

Nonmetals

c)

Metalloids

77.

a)

Metals

b)

Nonmetals

c)

Metalloids

78.

a)

Metals

b)

Nonmetals

c)

Metalloids

79.

a)

Metals

b)

Nonmetals

c)

Metalloids

80.

a)

Metals

b)

Nonmetals

c)

Metalloids

Chemistry Review

Total questions: 80

Worksheet time: 7hrs 40mins

Similar Resources on Wayground