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Worksheets

Midterm Review

Total questions: 90

Worksheet time: 2hrs 3mins

Name
Class
Date
1.

Which of the following describes a solid

a)

low kinetic energy

b)

high kinetic energy

c)

takes the shape of the container

d)

a fixed shape but not a fixed volume

2.

WHat happens when a substance goes from a liquid state to a solid state? (Think about liquid water forming ice)

a)

Thermal energy is added

b)

Pressure is added

c)

Thermal energy is removed

d)

Temperature increases

3.

Adding thermal energy (heat) to a substance ____ the space between particles.

a)

Increases

b)

Decreases

4.

What happens to molecules when their kinetic energy increases?

a)

The molecules move slower

b)

The molecules move faster

c)

The molecules get heavier

d)

It depends on the type of molecule

5.

Three containers with the same amount of the same material are shown below. Which container has the substance with the lowest amount of energy?

a)

The container on the left

b)

The middle container

c)

The container on the right

d)

All have an equal amount of energy

6.

Transition from a liquid to a gas

a)

Condensation

b)

Freezing

c)

Evaporation

d)

Melting

7.
Between which points is the temperature of the substance remaining constant?
a)
A-B only. 
b)
A-B, C-D, E-F
c)
B-C only. 
d)
B-C, D-E
8.
Whose law states that as pressure goes up, volume goes down?
a)
Charles 
b)
Boyle
c)
Aglow
d)
Mazias 
9.
A gas occupies 4.98 L at 2.6 atm of pressure. What volume does it occupy at 1.8 atm pressure?
a)
12.9 L
b)
0.72 L
c)
7.2 L
d)
3.44 L
10.

(Charles Law) There are 65 liters of helium in a balloon at 35 K. If the temperature of the balloon is increased to 40 K, what will the new volume of the balloon be?

a)

40 L

b)

70 L

c)

74.3 L

d)

75.9 L

11.

According to Charles Law, if Temperature of a gas increases Volume will also....

a)

Increases

b)

Decreases

c)

Stays the same

12.
Using Gay-Lussac's law, if the pressure of a gas starts out at 200kPa and increases to 600kPa, what would the initial temperature be if it ended up at 300K?
a)
50K
b)
200K
c)
400K
d)
100K
13.

Charles law states..

a)

As pressure goes up, volume goes up

b)

As volume goes up, temperature goes up

c)

As pressure goes up, temperature goes up

14.

Pure Substance or Mixture?

can be made from multiple elements that are chemically combined

a)

pure substance

b)

mixture

15.

Homogeneous or Heterogeneous?

a mixture that is uniform throughout

a)

homogeneous

b)

heterogeneous

16.
This diagram represents a _____.
a)
pure substance that is a compound
b)
mixture of elements
c)
pure substance that is an element
d)
mixture of compounds
17.
This diagram represents a _____.
a)
pure substance that is a compound
b)
mixture of elements
c)
pure substance that is an element
d)
mixture of compounds
18.

Ice melting is an example of a ...

a)

Physical Property

b)

Physical Change

c)

Chemical Property

d)

Chemical Change

19.

Milk turning sour is an example of a ...

a)

Physical Property

b)

Physical Change

c)

Chemical Property

d)

Chemical Change

20.

The luster or shine of a metal is an example of a ...

a)

Physical Property

b)

Physical Change

c)

Chemical Property

d)

Chemical Change

21.

Flammability is a ...

a)

Physical Property

b)

Physical Change

c)

Chemical Property

d)

Chemical Change

22.
Which statement best describes an electron?
a)
Smaller mass than a proton and a negative charge
b)
Smaller mass than a proton and a positive charge
c)
Greater mass than a proton and a negative charge
d)
Greater mass than a proton and a positive charge
23.
Which two particles make up the nucleus of an atom?
a)
Protons and Electrons
b)
Protons and Neutrons
c)
Molecules and Compounds
d)
Neutrons and Electrons
24.
In an atom, what is the number of protons equal to?
a)
The number of electrons.
b)
The number of neutrons.
c)
The number of molecules.
d)
The number of nuclei.
25.
What is the number of protons that the element in this image contain?
a)
14
b)
7
c)
15
d)
18
26.
What's a valence electron?
a)
electrons in the second energy level
b)
electrons in the outermost energy level
c)
the atomic number
d)
electrons in the first level
27.
The majority of an atom's mass exists where?
a)
In the nucleus
b)
In the electron cloud
c)
In the space between the nucleus and the electrons
d)
In the neutrons
28.

A neutral atom must have the same number of _______ and _______.

a)

protons

b)

neutrons

c)

electrons

d)

croutons

29.

What is the mass number of potassium that has 19 protons and 20 neutrons?

a)

19

b)

20

c)

39

d)

10

30.

Which of the following would NOT alter the atomic number of an atom?

a)

adding a neutron

b)

adding a proton

c)

removing a proton

31.
What scientist is best known for his "Plum Pudding" model of the atom?
a)
J.J. Tomson
b)
Ernest Rutherford
c)
John Dalton
d)
Democritus
32.
J.J. Thomson provided evidence that an atom...
a)
is the smallest particle of matter
b)
contains negatively charged particles
c)
has an overall negative charge
d)
has an overall positive charge
33.
Rutherford's gold foil experiment provided evidence that...
a)
negative and positive charges are spread evenly throughout the atom.
b)
alpha particles have a positive charge.
c)
gold is not a dense as previously thought.
d)
there is a dense positively charged nucleus at the center of an atom.
34.
The first person to propose a theory about an atom was
a)
Democritus
b)
Rutherford
c)
Dalton
d)
Aristotle
35.
What scientist first developed 4 rules for atomic theory, and helped kick start modern chemistry?
a)
J.J. Thomson
b)
Ernest Rutherford
c)
John Dalton
d)
Democritus
36.
Niels Bohr suggested that electrons.......
a)
are found in specific orbits
b)
electrons are scattered throughout the atom
c)
electrons move according to their energy level
d)
electrons are positive
37.

The vertical (up and down) columns in the Periodic Table are called

a)

groups

b)

towers

c)

periods

d)

atomic numbers

38.
The Modern Periodic Table of Elements is arranged by
a)
atomic mass
b)
atomic number
c)
valence electrons
d)
number of isotopes
39.
Elements in a ..................have similar chemical properties.  
a)
period
b)
group
c)
row
40.

Which group of elements have one valence electron(s)?

a)

Group 13

b)

Group 2

c)

Group 18

d)

Group 1

41.

Which classification of elements are shiny, silvery solids and good conductors of heat and electricity?

a)

Transition metals

b)

Metalloids

c)

Nonmetals

d)

Metals

42.

This could be the electron dot diagram of

a)

Magnesium

b)

Chlorine

c)

Carbon

d)

Oxygen

43.

This could be the electron dot diagram for

a)

Helium

b)

Aluminum

c)

Beryllium

d)

Silicon

44.

What is the "magic number" of valence electrons for atoms to be stable?

a)

1

b)

2

c)

8

d)

18

45.

Neon is a noble gas because it is stable, nonreactive, and has ___ valence electrons.

a)

1

b)

8

c)

10

d)

4

46.

Which elements have the most similar chemical properties?

a)

boron and carbon

b)

oxygen and sulfur

c)

aluminum and bromine

d)

argon and silicon

47.
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
48.

An atom with 3 valence electrons "wants" a full shell, so it can either gain 5 or lose 3. Which is more likely to occur?

a)

Gain 5

b)

Lose 3

c)

Nothing

49.

How do covalent bonds form?

a)

By donating and receiving valence electrons between atoms.

b)

Scientists still aren't sure.

c)

Opposite slight charges attract each atom in the compound.

d)

Sharing valence electrons between atoms

50.
How are ionic bonds formed?
a)
Transfer of electrons
b)
Sharing of electrons
51.

Which type of bond is formed between a metal and a nonmetal?

a)

Polar

b)

Metallic

c)

Covalent

d)

Ionic

52.

What is the correct formula for potassium oxide?

a)

KO2

b)

KO

c)

K2O

d)

OK2

53.

What is the correct name for SrF2?

a)

fluoride strontium

b)

strontium fluorine

c)

strontium diflluoride

d)

strontium fluoride

54.
What's the formula for chlorine dioxide
a)
ClO2
b)
CLO
c)
ClO3
d)
HClO2
55.

Name the following covalent compound.

NO

a)

Mononitrogen Oxide

b)

Nitrogen monoxide

c)

Nitrogen Oxide

56.
__Na + __Cl2 --> __NaCl
a)
1,1,2
b)
2,1,2
c)
2,1,1
d)
already balanced
57.
Balancing this reaction: ____ CH4 + ____ O2 ---> ____ CO2 + ____ H2O
a)
2,1,3,1
b)
1,2,1,2
c)
1,2,2,1
d)
2,1,1,2
58.
2 Na + Cl₂ →       2 NaCl
a)
Double Replacement
b)
Synthesis
c)
Single Replacement
d)
Decomposition
59.

Cl2 + 2 SnI4 → I2 + SnCl4

a)

Single Replacement

b)

Decomposition

c)

Double Replacement

d)

Synthesis

e)

Combustion

60.

2 H₂O₂ → 2 H₂O + O₂

a)

Double Replacement

b)

Single Replacement

c)

Synthesis

d)

Decomposition

e)

Neutralization

61.

HCl + AgNO3 → AgCl + HNO3

a)

Single Replacement

b)

Decomposition

c)

Double Replacement

d)

Synthesis

e)

Neutralization

62.

C7H14 + O₂ → CO₂ + H₂O

a)

Decomposition

b)

Single Replacement

c)

Double Replacement

d)

Combustion

e)

Neutralization

63.

In an endothermic reaction, energy is _________.

a)

absorbed

b)

released

64.

_____ reactions usually feel hot!

a)

endothermic

b)

exothermic

65.

____ reactions usually feel cold.

a)

endothermic

b)

exothermic

66.
Products will form faster if____________
a)
the particle size of the reactants are larger.
b)
temperature is decreased.
c)
concentration of the reactants are increased.
d)
the reaction is not stirred.
67.

Increasing the ____ causes the particles (atoms

or molecules) of the reactants to move more quickly so that

they collide with each other more frequently and with more

energy.

a)

Catalyst

b)

Surface Area

c)

Temperature

d)

Concentration

68.

Collision theory states that....

a)

reaction rate increases when particles collide more

b)

reaction rate is not affected by collisions

c)

reaction rate increases as there are fewer collisions

d)

there is no relationship between collisions and reaction rate.

69.

What is the pH range of an acid?

a)

4-6

b)

1-7

c)

1-6

d)

8-14

70.

What would happen to blue litmus paper if it came into contact with an acid?

a)

It would turn red

b)

It would turn green

c)

It would stay blue

d)

It would turn pink

71.

What would happen to red litmus paper when it encounters a base?

a)

It turns blue

b)

It stays red

c)

It turns purple

d)

It turns green

72.

A substance is found to have the following characteristics:


Very bitter taste

Feels slippery to the touch

Produces OH- ions when dissolved in water


In what category would the substance be classified?

a)

acid

b)

base

c)

enzyme

d)

fatty acid

73.
What would be considered the weakest base? 
a)
8
b)
14
c)

7

d)

11

74.
Pure water has a pH of 7. Pure water _______.
a)
is a base
b)
is a neutral substance
c)
could be either an acid or a base
d)
is an acid
75.

What is the fundamental force responsible for holding the nucleus of an atom together?

a)

strong nuclear force

b)

weak nuclear force

c)

gravitational force

d)

electromagnetic force

76.

Which fundamental force is responsible for the attraction between two charged particles?

a)

Gravitational force

b)

Electromagnetic force

c)

Weak nuclear force

d)

Strong nuclear force

77.

What is the weakest fundamental force in nature?

a)

Gravitational force

b)

Strong nuclear force

c)

Electromagnetic force

d)

Weak nuclear force

78.

Which fundamental force is responsible for radioactive decay?

a)

gravitational force

b)

weak nuclear force

c)

electromagnetic force

d)

strong nuclear force

79.

In Alpha decay what particle is emitted?

a)

Helium (He)

b)

Electron (e-)

c)

Energy (Photon)

80.

In Beta decay what particle is emitted?

a)

Helium (He)

b)

Electron (e-)

c)

Energy (Photon)

81.

In Gamma decay what particle is emitted?

a)

Helium (He)

b)

Electron (e-)

c)

Energy (Photon)

82.

Identify the missing variable in the following reaction.

a)
b)
c)
83.

Identify the missing variable in the following reaction.

a)
b)
c)
84.
The half-life of strontium-90 is 25 years. How much strontium-90 will remain after 100 years if the initial amount is 4.0 g?
a)
3.0g
b)
0.25mg
c)
0.3g
d)
0.25g
85.
Takes two small nuclei and combines them into a larger nucleus
a)
fission
b)
fusion
86.
The splitting of a nucleus into smaller nuclei is
a)
fusion
b)
fission
c)
half-life
d)
gamma radiation
87.
How do nuclear power-plants work?
a)
Fusion
b)
Half-life
c)
Fission
d)
Fusion or fission
88.

Where does fusion take place?

a)

sun

b)

stars

c)

deep inside the earth

d)

nuclear reactors

89.

Which reaction represents fission?

a)
b)
c)
d)
90.

Which reaction represents fusion?

a)
b)
c)
d)

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