Free Printable Exam 1 Review

Free Printable Worksheets

Worksheets

Exam 1 Review

Total questions: 76

Worksheet time: 6hrs 20mins

Name

Class

Date

1.

Which characteristic of a substance is considered a chemical property?

a)

its boiling point

b)

its reactivity

c)

its density

d)

its conductivity

2.

Which observations prove a chemical change has occurred?

a)

Dissolving and expected color change

b)

Mixing and dissolving

c)

State of matter change and boiling water bubbles

d)

Unexpected color change and temperature change

3.

A student mixes yellow powder with water. Which observation would prove a CHEMICAL change occurred?

a)

The powder DISSOLVED in the water

b)

The water turned the COLOR yellow

c)

The bag's TEMPERATURE changed

d)

The STATE OF MATTER changed

4.

Which of the following options provides evidence of a CHEMICAL change?

a)

Wood is burned releasing ash and smoke

b)

Rocks separate when soil is sifted

c)

Water turns to ice when you put it in the freezer

d)

Salt dissolves in water

5.

Which of the following examples provides evidence of a PHYSICAL change?

a)

Wood is burned and releases ash and smoke

b)

Iron rusts over time

c)

When mixed, baking soda and vinegar form gas bubbles

d)

A piece of paper changes shape when you rip it up

6.

A white tablet is dropped into water. The water becomes cloudy and bubbles are produced. What type of change has occurred?

a)

Physical change

b)

Chemical change

c)

No change

7.

Which observations prove a chemical change has occurred?

a)

Dissolving and expected color change

b)

Mixing and dissolving

c)

State of matter change and boiling water bubbles

d)

Unexpected color change and temperature change

8.

When mixing milk and vinegar, a white, chunky, solid substance is formed. What has occurred?

a)

Physical change: state of matter

b)

Chemical change: production of a solid

c)

Physical change: freezing

d)

Chemical change: rust

9.

A physical change...

a)

Changes the physical properties of an object, but does not create a new substance.

b)

Creates a new substance and cannot be undone.

10.

A chemical change...

a)

Changes the physical properties of an object, but does not create a new substance.

b)

Creates a new substance and cannot be undone.

11.

Is this an example of a physical or chemical change?

a)

Physical

b)

Chemical

12.

Is this an example of a physical or chemical change?

a)

Physical

b)

Chemical

13.

Is this an example of a physical or chemical change?

a)

Physical

b)

Chemical

14.

Is this an example of a physical or chemical change?

a)

Physical

b)

Chemical

15.

Is this an example of a physical or chemical change?

a)

Physical

b)

Chemical

16.

Is this an example of a physical or chemical change?

a)

Physical

b)

Chemical

17.

Is this an example of a physical or chemical change?

a)

Physical

b)

Chemical

18.

Melting a chocolate bar is a...

a)

Physical change

b)

Chemical change

19.

Which of the following is NOT an example of a physical change?

a)

Crumpling paper

b)

Sharpening a pencil

c)

Clothes shrinking in the dryer

d)

Milk turning sour

20.

A change in which NEW substances are formed.

a)

Chemical change

b)

Physical change

21.

Which of the following is NOT an example of chemical change?

a)

Milk turning sour

b)

Burning wood

c)

Breaking a pencil

d)

Metal turning rusty

22.

The base measurement for mass is...

a)

kilogram

b)

liters

c)

grams

d)

meters

23.

240 cm = ___________ m

a)

2400

b)

24

c)

2.4

d)

0.24

24.

1000 m = ___________ km

a)

100

b)

10

c)

1

d)

0.1

25.

15.6 L = ___________ mL

a)

15,600

b)

156,000

c)

1,560,000

d)

15,600,000

26.

0.57 mL = ___________ L

a)

5.7

b)

0.057

c)

0.0057

d)

0.00057

27.

330 cm = ___________ m

a)

3,300

b)

33

c)

3.3

d)

0.33

28.

32.9 km = ___________ cm

a)

32,900

b)

329,000

c)

3,290,000

d)

32,900,000

29.

1000 grams = _____ kilograms

a)

0.0001

b)

1,000,000

c)

10

d)

1

30.

Convert 5 cm to mm:

a)

5,000mm

b)

0.5 mm

c)

0.05 mm

d)

50 mm

31.

1000 grams = _____ kilograms

a)

0.0001

b)

1,000,000

c)

10

d)

1

32.

6 kg = _____ g

a)

6

b)

6000

c)

600

d)

.006

33.

3. What electrical charge does nucleus carry?

a)

positive charged (protons) and neutrons (which have no electrical charged)

b)

Just positive charged

c)

Electrons and protons

d)

protons, electrons and neutrons

34.

2. Describe the positions of electrons of an atom.

a)

inthe central of atom

b)

outside the nucleus

c)

inside the nucleus

35.

4. What electrical charge do electrons carry?

a)

positive charged

b)

no electricity charged

c)

negative charged

36.

9. What pattern is there in the way that metal atoms?

a)

gain electron

b)

lose electron

37.

What charge does an atom have when it GAINS electrons?

a)

Positive

b)

Negative

c)

Neutral

38.

What is a representation of an ion?

a)

Li

b)

Na-22

c)

O^-2

39.

What is the mass number of bromine?

a)

35

b)

45

c)

80

d)

79.904

40.

How many neutrons does this bromine atom have?

a)

35

b)

45

c)

80

41.

What type of atom is this?

a)

Neutral atom

b)

Cation

c)

Anion

d)

Isotope

42.

What two particles determine the mass number?

a)

Protons and electrons

b)

Electrons and neutrons

c)

Protons and neutrons

43.

What type of atom is this?

a)

Normal Atom

b)

Cation

c)

Anion

d)

Isotope

44.

What is the mass number of this Neon atom?

a)

10

b)

11

c)

21

d)

20

45.

What does it change in an ion?

a)

The number of electrons

b)

The number of protons

c)

The number of neutrons

46.

How many neutrons does this Neon atom have?

a)

21

b)

11

c)

10

d)

12

47.

What does it happen to this atom?

a)

It LOSES electrons

b)

It GAINS electrons

c)

It GAINS protons

d)

It LOSES protons

48.

What is the atomic number of this element?

a)

12

b)

24

c)

23

49.

What type of atom is element C?

a)

Normal atom

b)

Ion

c)

Isotope

50.

What is the mass number of this element?

a)

12

b)

24

c)

23

d)

11

51.

Two atoms of different elements will definitely have different numbers_____

a)

Nuclei

b)

Protons

c)

Neutrons

d)

Electrons

52.

An ion forms when an atom gains or loses

a)

Protons

b)

Neutrons

c)

Electrons

53.

A neutral atom would become an ion that has a charge of 2+ by

a)

Losing two protons

b)

Losing two neutrons

c)

Losing two electrons

54.

Isotopes are atoms that have different

a)

Mass numbers

b)

Element names

c)

Atomic Numbers

55.

A positively charged ion is formed when

a)

A neutron is lost

b)

An electron is lost

c)

A neutron is gained

d)

An electron is gained

56.

Two atoms that have different numbers of protons are

a)

Different ions

b)

Different isotopes

c)

Different elements

57.

An ion that has a negative charge is formed when an atom

a)

Loses neutrons

b)

Loses electrons

c)

Gains neutrons

d)

Gains electrons

58.

What information would allow you to determine whether two atoms are of the same or different elements

a)

The charge on each atom

b)

The number of neutrons each has

c)

The number of protons in their nuclei

d)

The location of the electrons in their electron clouds

59.

Is the element shown in this image an ion, isotope or normal atom?

a)

atom

b)

isotope

c)

cation (+ ion)

d)

anion (- ion)

60.

The atomic mass is equal to _.

a)

the number of protons only

b)

the number of neutrons only

c)

the total number of protons and neutrons

d)

the number of protons, neutrons, and electrons.

61.

If a photon hits an atom, the electron will ___________ the energy. It is promoted from a _____ energy level to a ______ energy level.

a)

absorb; lower; higher

b)

emit; lower; higher

c)

absorb; higher; lower

d)

emit; higher; lower

62.

_____________________ is the lowest energy level an electron will occupy in an atom.

a)

ground state

b)

excited state

63.

Can electrons exist between energy levels/orbits?

a)

Yes

b)

No

64.

What element is represented in this Bohr Model?

a)

Helium

b)

Hydrogen

c)

Argon

d)

Silver

65.

What element is represented in this Bohr Model?

a)

Boron

b)

Carbon

c)

Nitrogen

d)

Lithium

66.

What element is represented in this Bohr Model?

a)

Lithium

b)

Boron

c)

Carbon

d)

Neon

67.

What is the mass number of this atom?

a)

1

b)

3

c)

4

d)

7

68.

What is the atomic number of this atom?

a)

2

b)

4

c)

6

d)

none of the above

69.

Type of matter with definite volume but not a definite shape

a)

solids

b)

liquids

c)

gases

70.

Type of matter that does not have a definite volume nor a definite shape.

a)

solids

b)

liquids

c)

gases

71.

Which of these are homogeneous mixtures?

a)

peanuts and almonds mixed in a bowl

b)

food dye mixed in water

c)

a cup of tea and sugar

d)

concrete

72.

Chemists investigated an unknown substance and found it to have the following characteristics:

Different components could be observed in the substance.

Different samples of the substance appeared to have different proportions of the components.

The components could be easily separated using filters and sorting.

Which statement most accurately describes this substance?

a)

compound

b)

element

c)

heterogeneous mixture

d)

homogeneous mixture

73.

When Phillip analyzed an unknown substance X, he found that it contained only one kind of atom. Phillip was unable to convert the substance to a simpler one. What is substance X?

a)

a compound

b)

an element

c)

a heterogeneous mixture

d)

a homogeneous mixture

74.

Which of the following are considered pure substances?

a)

homogeneous mixture

b)

compound

c)

element

d)

heterogeneous mixture

75.

What type of substance is shown?

a)

element

b)

compound

c)

homogeneous mixture

d)

heterogeneous mixture

76.

Match the following

a)

Pure Substance

1.

Matter that always has the exact same composition.

b)

Element

2.

A substance that cannot be broken down into simpler substances

c)

Compound

3.

A substance that is made of 2 or more simpler substances.

d)

Heterogeneous

4.

The parts of this mixture are noticeably different.

e)

Homogeneous

5.

The parts of this mixture are indistinguishable from one another.

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