Free Printable First Semester Exam Review for Chemistry 2024

Free Printable Worksheets

Worksheets

First Semester Exam Review for Chemistry 2024

Total questions: 135

Worksheet time: 5hrs 11mins

Name

Class

Date

1.

What is the first step in the scientific method?

a)

Ask a question

b)

Conclusion

c)

No Horse Play

d)

Observe

2.

Which are part of the scientific method?

a)

Identify the Problem

b)

Perform an Experiment

c)

Form a Hypothesis

d)

Collect lots of money

e)

Communicate the Results

3.

The measure of a distance from point A to point B is called

a)

mass

b)

length

c)

volume

d)

weight

4.

The measure of the amount of matter in an object is called

a)

length

b)

height

c)

mass

d)

mole

5.

The base unit for length in SI units is the

a)

liter

b)

gram

c)

milliliter

d)

meter

6.

What is the symbol for Kelvin?

a)

kk

b)

k

c)

kg

d)

K

7.

The SI unit for time is the ____

a)

gram

b)

liter

c)

hours

d)

second

8.

The official SI temperature scale is called the ____________

a)

Fahrenheit scale

b)

Celsius scale

c)

Kelvin scale

d)

Decimal scale

9.

What is the base unit for amount of substance?

a)

kilogram

b)

gram

c)

milligram

d)

mole

10.

What is 9.2 x 10⁴in standard notation?

a)

9,200

b)

92,000

c)

920,000

d)

920

11.

What is 416,000,000 in scientific notation?

a)

4.16 x 10⁸

b)

4.16 x 10⁹

c)

4.16 x 10^-8

d)

4.16 x 10^-9

12.

What is 2.8 x 10^-4 in standard notation?

a)

28,000

b)

280,000

c)

.00028

d)

.000028

13.

What does a negative exponent mean in scientific notation? (example: 1.19 x 10^-3)

a)

It means the number is very large

b)

It means the number is very small

14.

What is 7.0 x 10⁸in standard notation?

a)

7,000,000,000

b)

70,000,000

c)

700,000,000

d)

.000000007

15.

What is 1 in scientific notation?

a)

1

b)

1 x 10^-1

c)

1 x 10^-1

d)

1 x 10⁰

16.

What is 2.8 x 10³ in standard notation?

a)

28,000

b)

2,800

c)

.0028

d)

.00028

17.

How many significant figures does this measurement have?

0.925 mol

(a)

18.

How many significant figures does this measurement have?

9.340 kg

(a)

19.

How many significant figures does this measurement have?

250 m

(a)

20.

How many significant figures does this measurement have?

0.00903 hm

(a)

21.

How many significant figures does this measurement have?

75,000.0 mm

(a)

22.

Round 0.0529 to 1 significant figure.

(a)

23.

Round 890.6319 to 3 significant figures.

(a)

24.

Round 1.00059832 to 4 significant figures.

(a)

25.

Calculate, giving the answer in the correct number of significant digits.

9.3 – 2.003 = ?

(a)

26.

Calculate, giving the answer in the correct number of significant digits.

84.93 ÷ 2.01 = ?

(a)

27.

How many significant figures does the following number have: 0.00204

a)

6

b)

4

c)

3

d)

2

28.

How many significant figures does the following number have?1.2500 x $10^3$

a)

5

b)

3

c)

Ambiguous: 3 or 5

d)

7

29.

How many significant figures does the following number have: 100.00210

a)

7

b)

8

c)

10

d)

Ambiguous: 7 or 8

30.

Round 1289 to three significant figures

a)

1290

b)

130

c)

1300

d)

1.29x10³

31.

Solve and give your answer with the correct number of significant figures
24.28 + 12.5

a)

3.687 x 10¹

b)

36.8

c)

37

d)

3.70x10¹

32.

Calculate 12.47 m ÷ 3.2 s and give your answer with the correct number of significant figures.

a)

4 m/s

b)

3.9 m/s

c)

3.90 m/s

d)

3.897 m/s

33.

What is the formula for density?

a)

density = mass x volume

b)

density = mass / volume

c)

density = mass + volume

d)

density = mass - volume

34.

Frank has an eraser. It has a mass of 4g, and a volume of 2cm³. What is its density?

a)

8 g/cm³

b)

2 g/cm³

c)

1/2 g/cm³

d)

24 g/cm³

35.

What is the volume of Object X?

a)

10.0 cm³

b)

15.0 cm³

c)

20.0 cm³

d)

25.0 cm³

36.

Jack has a rock. The rock has a mass of 14 g and a volume of 2 cm³. What is the density of the rock?

a)

7 mL

b)

7 g/cm³

c)

28 g/cm³

d)

1/7 g/cm³

37.

What units can be used to express density?

a)

g/mL

b)

grams

c)

millimeters

d)

milliliters

38.

A friend wants you to buy a small golden cube for $100 telling you it is made of pure gold. You google the density of gold using your cell phone and discover that the density of gold is 19.3 g/cm³. You measure the mass of the small golden cube to be 600 grams and then take length, width, and height measurements shown in this shared image. Calculate the density of this small golden cube to determine if you should pay $100 for it. (Click on the image to enlarge it and use a calculator if necessary)

a)

24 g/cm³

b)

240 g/cm³

c)

25 g/cm³

d)

250 g/cm³

39.

Iron rusts.

a)

Chemical change

b)

Physical Change

40.

A tire is inflated with air.

a)

Chemical Change

b)

Physical Change

41.

Food is digested in the stomach

a)

Chemical Change

b)

Physical Change

42.

Which of the following is a Physical Property

a)

Toxicity

b)

Flammability

c)

Malleability

d)

Reactivity

43.

Is freezing juice a physical or chemical change?

a)

Physical Change

b)

Chemical Change

44.

Any change in the state of matter of a substance is a...

a)

Physical Change

b)

Chemical Change

45.

Evidence of a physical change.

a)

New substance

b)

Shape Change

c)

Light produced

d)

Gas released.

46.

The Matter Classification of Air is

a)

Compound

b)

Element

c)

Pure Substance

d)

Mixture

47.

What does this pic illustrate?

a)

Element

b)

Mixture of Compunds

c)

Mixture of elemets

d)

Compounds

48.

Contains only one kind of atom.

a)

Element

b)

Compund

c)

Mixture

49.

Which of the following represents an element?

a)

H₂O

b)

HCl

c)

NaCl

d)

Au

e)

CaCO₃

50.

Which two types of matter are pure substances?

a)

elements and compounds

b)

mixtures and elements

c)

homogenous mixtures and elements

51.

The diagram shows

a)

element

b)

mixture

c)

compound

52.

What is a type of mixture in which different parts can easily be seen (Ex. Vegetable soup)?

a)

Heterogeneous mixture

b)

Homogeneous mixture

c)

Solution

d)

Colloid

53.

Matter can be classified as either a __________ or a _____________.

a)

Element or a Compound

b)

Compound or a Solid

c)

Pure Substance or a Mixture

d)

Mixture or a Solid

54.

A mixture that is uniformly mixed is called?

a)

Element

b)

Compound

c)

Homogeneous

d)

Heterogenous

55.

A chocolate chip cookie is an example of:

a)

Substance

b)

Compound

c)

Homogeneous mixture

d)

Heterogeneous mixture

56.

Which of the following is not an element?

a)

water

b)

hydrogen

c)

carbon

d)

oxygen

57.

How would you classify this image?

a)

homogeneous mixture

b)

heterogeneous mixture

58.

The amount of energy required to raise the temperature 1ºC for every kilogram is called____?

a)

Thermal Energy

b)

Specific Heat

c)

Temperature

d)

Kinetic Energy

59.

What is the symbol for Thermal Energy?

a)

Q

b)

t

c)

m

d)

C

60.

What unit do you use to measure Thermal Energy?

a)

J/Kg ºC

b)

Kg

c)

ºC

d)

J

61.

The specific heat of aluminum is 0.21 cal/g°C. How much heat(Q) is released when a 10 g piece of aluminum foil is taken out of the oven and cools from 100° to 50°?

a)

105 J

b)

10.5 J

c)

1.05 J

d)

50 J

62.

20 g of water. specific heat of water is 4.18 J/g°C. temperature changes from 25° C to 20° C, how much heat energy (Q) moves from the water to the surroundings?

a)

418 Joules

b)

209 J

c)

83 J

d)

4.18 J

63.

Calculate the heat needed to raise the temperature of 0.25 kg of aluminum 7°C (c=900 J/kg°C)

a)

1575 J

b)

-1575 J

c)

514 J

d)

-514 J

64.

According to Dalton's atomic theory, all matter is made of ________.

a)

Molecules

b)

Protons, neutrons, and electrons

c)

Atoms

d)

Subatomic particles

65.

Which part of Dalton's atomic theory had to be modified based on the discovery of subatomic particles and isotopes?

a)

All matter is made of atoms

b)

All atoms of a given element are identical in mass and properties

c)

Compounds are combinations of two or more different types of atoms

d)

A chemical reaction is a rearrangement of atoms

66.

Who came up with the first atomic theory?

a)

Dalton

b)

Socrates

c)

Thomas

d)

Rutherford

67.

Who discover the electron?

a)

Dalton

b)

Rutherford

c)

Thomson

d)

Bohr

68.

What did Rutherford discover in his experiment?

a)

nucleus

b)

electrons

c)

neutrons

d)

protons

69.

Rutherford's "gold-foil" experiment using alpha particle scattering concluded that

a)

the center of the atom is empty

b)

atomic mass is spread over the whole atom

c)

the center of the atom has a negative charge

d)

most of the atom is empty

70.

Where are electrons located in an atom?

a)

Nucleus

b)

Electron Cloud

c)

Within a Proton

d)

Within a Neutron

71.

What scientist is best known for his "Plum Pudding" model of the atom?

a)

J.J. Thomson

b)

Ernest Rutherford

c)

John Dalton

d)

Democritus

72.

How did Rutherford discover the proton?

a)

Cathode tube ray experiment

b)

Gold Foil Experiment

c)

Planetary Model

d)

Plum Pudding Model

73.

What determines the identity of the atom?

a)

protons

b)

neutrons

c)

electrons

d)

isotopes

74.

What are the four parts of Dalton's Atomic Theory?

(select 4)

a)

Atoms are Tiny, Indivisible particles

b)

Atoms of one element are all the same

c)

Atoms of different elements are different

d)

Compounds form by combining atoms

e)

Atoms of the opposite force attract each other

75.

How many neutrons in C-14?

a)

6

b)

7

c)

14

d)

8

76.

How many neutrons does an atom of the isotope Neon-22 have?

a)

12

b)

10

c)

22

d)

20

77.

76 protons and 114 neutrons

a)

Osmium-114

b)

Osmium-76

c)

Osmium-190

d)

Osmium-190.23

78.

How many neutrons does the isotope of lithium have?

a)

8

b)

3

c)

4

d)

5

79.

What is the name of the pictured isotope?

a)

Copper-29

b)

Copper-63

c)

Copper-34

d)

CopperWopperHopperBopper

80.

What is the mass number of the pictured isotope?

a)

17

b)

35

c)

35.45

d)

18

81.

If an atom has 5 protons and 6 neutrons what is the proper name of the isotope?

a)

Boron-1

b)

Boron-11

c)

Carbon-1

d)

Carbon-11

82.

Why did Dmitri Mendeleev leave spaces i his periodic table?

a)

He left spaces for undiscovered elements.

b)

He left spaces for discovered elements.

c)

He left spaces to be more organized.

d)

none of the above

83.

In the modern periodic table elements are arranged by:

a)

atomic mass

b)

atomic number

c)

valence electrons

d)

number of isotopes

84.

A horizontal row of elements in the periodic table is called:

a)

column

b)

group

c)

period

d)

family

85.

A vertical column in the periodic table is called:

a)

row

b)

group

c)

period

d)

table

86.

Who arranged the periodic table by increasing atomic number?

a)

Mendeleev

b)

Rutherford

c)

Bohr

d)

Mosely

87.

_______________ developed the first periodic table and arranged the elements in order of increasing atomic mass.

a)

Stevie Wonder

b)

Sasha Vujacic

c)

Dmitri Mendeleev

d)

James Mosely

88.

Alkali Metals are..

a)

in group 1 and are the most reactive metals.

b)

in group 2 and are the second most reactive metals.

c)

in group 17 and are the most reactive nonmetals.

d)

in group 18 and are inert (unreactive).

89.

Alkaline Earth Metals are..

a)

in group 1 and are the most reactive metals.

b)

in group 2 and are the second most reactive metals.

c)

in group 17 and are the most reactive nonmetals.

d)

in group 18 and are inert (unreactive).

90.

Where are the nonmetals located on the Periodic Table?

a)

On the right

b)

On the left

c)

On the stairstep

91.

Where are the metals located on the Periodic Table?

a)

On the right

b)

On the left

c)

On the stairstep

92.

Where are the metalloids located on the Periodic Table?

a)

On the right

b)

On the left

c)

On the stairsteps

93.

poor conductors; found in upper right of PT; dull and brittle; mostly gases

a)

metalloids

b)

metals

c)

semiconductors

d)

nonmetals

94.

all have full valence shell; inert gases; "nonreactive"

a)

Halogens

b)

Actinides

c)

Metalloids

d)

Noble Gases

95.

Group 2; less reactive than Group 1

a)

Alkali Metals

b)

Alkaline Earth Metals

c)

Transition Metals

d)

Actinides

96.

Which two elements on the periodic table are in the same period?

a)

Sn and Rb

b)

K and Ba

c)

F and Cl

d)

Se and Te

97.

In what section would Noble Gases be found?

a)

white

b)

yellow

c)

blue

d)

red

98.

Which is a halogen?

a)

Helium

b)

Chlorine

c)

Oxygen

d)

Neptune

99.

The family in the periodic table that contains the most reactive metals is the_______

a)

Alkaline Earth Metals

b)

Transition Metals

c)

Alkali Metals

d)

Other Metals

100.

Carbon dioxide

a)

C₂O₂

b)

C₂0

c)

CO

d)

CO₂

101.

Phosphorous trichloride

a)

PCl₃

b)

P₃Cl

c)

P₃Cl₃

d)

PCL

102.

Disulfur trioxide

a)

S₃O₂

b)

SO

c)

S₂O₃

d)

S₂O

103.

The chemical formula for an ionic compound of aluminum and chlorine is

a)

AlCl.

b)

ClAl.

c)

AlCl₃.

d)

Al₃Cl.

104.

The chemical formula for an ionic compound of potassium and oxygen is

a)

KO.

b)

K₂O.

c)

K₂O₂.

d)

KO₂.

105.

What is the name of Ca(NO₃)₂

a)

calcium nitrite

b)

calcium II nitrate

c)

calcium nitrate

d)

carbon nitrate

106.

Fe⁺³combines with S^-2to form

a)

Fe⁺⁴(S)⁼³

b)

Fe²S⁴

c)

Fe₂S₃

d)

Fe³S²

107.

MgF₂

a)

magnesium fluoride

b)

manganese Phosphide

c)

magnesium(III) fluoride

d)

magnesium fluoride(II)

108.

NO

a)

nitrogen oxide

b)

nitrogen (II) oxide

c)

nitrogen peroxide

d)

nitrogen monoxide

109.

NaC₂H₃O₂

a)

sodium acetate

b)

sodium (II) acetate

c)

sodium (I) carbonate

d)

sodium carbonate

110.

KOH

a)

potassium oxygen hydride

b)

potassium hydroxide

c)

potassium (I) hydroxide

d)

potassium monohydroxide

111.

What is the formula for the compound formed by lead(II) ions and chromate ions?

a)

PbCrO₄

b)

Pb₂CrO₄

c)

Pb₂(CrO₄)₃

d)

Pb₂(CrO₄)₂

112.

What is the correct name for Al₂(SO₄)₃?

a)

aluminum(II) sulfate

b)

dialuminum trisulfate

c)

aluminum sulfide

d)

aluminum sulfate

113.

What is the molecular formula for barium hydroxide?

a)

BaOH

b)

Ba₂OH

c)

Ba(OH)₃

d)

Ba(OH)₂

114.

Name the compound Zn₃(PO₄)₂

a)

Zinc chloride

b)

Sodium phosphate

c)

Zinc phosphate

d)

Aluminum sulfate

115.

Which of the following is the metallic ion in iron (III) oxide?

a)

Fe³

b)

Fe²

c)

O^-2

d)

O^-1

116.

How many atoms of fluorine are present in a molecule of carbon tetrafluoride, CF₄?

a)

1

b)

2

c)

4

d)

5

117.

Name the compound $CF_4$ .

a)

calcium fluoride

b)

carbon fluoride

c)

carbon tetrafluoride

d)

monocarbon quadrafluoride

118.

What is the formula for diphosphorous pentoxide?

a)

$P_2PeO_5$

b)

$P_2O_4$

c)

$P_2O_5$

d)

$PO_5$

119.

What is the formula for Silicon dioxide?

a)

$SO_2$

b)

$S_2O$

c)

$Si_2O$

d)

$SiO_2$

120.

What is the formula for zinc fluoride?

a)

ZnF₂

b)

ZnF₃

c)

Zn₂F

d)

ZnF

121.

What is the formula for the compound formed by lead(II) ions and chromate ions?

a)

PbCrO₄

b)

Pb₂CrO₄

c)

Pb₂(CrO₄)₃

d)

Pb₂(CrO₄)₂

122.

H₂SO₄- name?

a)

hydrogen sulfide

b)

hydrosulfuric acid

c)

hydrogen sulfide

d)

sulfuric acid

123.

Name the acid: HC₂H₃O₂

a)

Acetic Acid

b)

Acetous Acid

c)

Hydrogen Acetate

d)

Hydrogen Dicarbon Trihydrogen Dioxygen

124.

What is the formula for phosphorous acid?

a)

H₃PO₄

b)

H₂PO₄

c)

H₃P

d)

H₃PO₃

125.

What is the formula for Hydrosulfuric Acid?

a)

H₂(SO₃)

b)

H₂S

c)

H₂(SO₂)

d)

H₂(SO₄)

126.

Balance this equation
_Al +_HCl --> _H₂+_AlCl₃

a)

2, 6, 3, 2

b)

it is already balanced

c)

4, 12, 3, 4

d)

2, 1, 4, 5

127.

Balance this equation-
__P₄+ __O₂--> __P₂O₃

a)

it is already balanced

b)

2, 1, 3

c)

1, 2, 3

d)

1, 3, 2

128.

What is the left part of a chemical equation called?
2H_{2 +}O₂ --> 2H₂O

a)

Reactants

b)

Products

c)

Yields

d)

Chemical Equation

129.

What is the right part of a chemical equation called...
2H_{2 +}O₂ --> 2H₂O

a)

Reactants

b)

Products

c)

Yields

d)

Chemical Equation

130.

What is the little number after an element in a chemical equation called.
Example: H₂

a)

Coefficient

b)

Subscript

c)

Atom

d)

Equation

131.

Is the following equation balanced?...
Al + O₂ --> 2Al₂O₃

a)

Yes!

b)

No!

132.

What is the number before a chemical formula called?
Ex: 2H₂ + O₂ --> 2H₂O

a)

Coefficient

b)

Subscript

c)

Atom

d)

Equation

133.

Is the following equation balanced?
2C₂H₂ + 5O₂ --> 4CO₂ + 2H₂O

a)

yes

b)

no

134.

Balance the equation

? Ag₂O -> ? Ag + ? O₂

a)

2,4,1

b)

2,3,2

c)

3,3,2

d)

it is already balanced

135.

__Al + __Fe₃N₂ -->__AlN + __Fe

a)

already balanced

b)

4,2,4,6

c)

2,1,2,3

d)

1,2,1,3

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