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Chemistry Midterm

Total questions: 83

Worksheet time: 2hrs 34mins

Name
Class
Date
1.

Which of the following make up parts of an atom?

a)

neutron

b)

proton

c)

electron

d)

ultron

2.

Which of the following parts of an atom are positively charged?

a)

neutron

b)

proton

c)

electron

d)

nucleus

3.

A charged atom is called a(n)...

a)

electron.

b)

ion.

c)

proton.

d)

acid.

4.

How many protons does sulfur have?

a)

32

b)

16

c)

48

d)

12

5.

How many electrons does sulfur have

a)

16

b)

32

c)

48

d)

12

6.

These are found in the nucleus and have a neutral charge.

a)

proton

b)

electron

c)

neutron

7.

Subatomic particles with a negative charge

a)

Electrons

b)

Neutrons

c)

Protons

d)

Quarks

8.
What is the atomic mass of "F"
a)
9
b)
18
c)
17
d)
19
9.

How many neutrons does a Hydrogen atom have?

a)

1

b)

2

c)

3

d)

0

10.

How many neutrons does an Oxygen atom have?

a)

8

b)

16

c)

24

d)

7.999

11.

In an atom, an orbital represents

a)

the most probably location of a proton

b)

the most probable location of an electron

c)

the least probably location of a neutron

d)

photons emitted as electrons move to lower energy levels

12.

Which particle has a mass so small, it is considered to be 0 amu?

a)

proton

b)

hydrogen nucleus

c)

neutron

d)

electron

13.
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.
14.
True or False: The majority of an atom is made up of empty space
a)
True
b)
False
15.
How do you convert Celsius to Kelvin?
a)
Add 273
b)
Subtract 273
c)
You can't convert those
d)
They are the same thing
16.
Which is a quality that only gasses display
a)
Spread out to fill all available space
b)
Take the shape of their container
c)
Can't be compressed
d)
All of these
17.
energy in endothermic reactions are
a)
released
b)
ended
c)
absorbed
18.
energy in exothermic reactions are
a)
released
b)
absorbed
19.
Traveling down a family the atomic radii ______________.
a)
Increases
b)
Decreases
c)
Stays the same
20.
Traveling across a period the atomic radii ______________.
a)
Increases
b)
Decreases
c)
Stays the same
21.
How does ionization energy change as I go across a period ?
a)
It doesn't
b)
It increases
c)
It decreases
22.
How does ionization energy change as I go down a family?
a)
It doesn't
b)
It increases
c)
It decreases
23.
Ionization Energy is defined as.....
a)
The smallest amount of energy possible to excite an electron to a higher energy level
b)
The amount of energy given off when an electron returns to a ground state
c)
The amount of energy in one photon
d)
The energy required to remove one electron from a neutral atom
24.
How many valence electrons does Helium have?
a)
1
b)
2
c)
8
25.
Is wood burning a physical or chemical change?
a)
Physical 
b)
Chemical
26.

A phase change is a...

a)

physical change

b)

chemical change

27.

During which phase change does a substance release energy?

a)

condensation

b)

evaporation

c)

melting

d)

sublimation

28.

During which phase change does a substance absorb energy?

a)

freezing

b)

condensation

c)

evaporation

d)

deposition

29.

Which phase change is endothermic?

a)

condensation

b)

deposition

c)

melting

d)

freezing

30.

What is happening to the potential energy at interval AB?

a)

increasing

b)

decreasing

c)

staying constant

31.

What is happening to the kinetic energy at interval BC?

a)

increasing

b)

decreasing

c)

staying constant

32.

What is happening to the potential energy at interval BC?

a)

increasing

b)

decreasing

c)

staying constant

33.

Which particle diagram shows a solid?

a)
b)
c)
34.

At what time interval is the substance melting?

a)

AB

b)

BC

c)

CD

d)

DE

35.

At what time interval is the substance evaporating?

a)

AB

b)

BC

c)

CD

d)

DE

36.

Which formula would you use to calculate the heat absorbed when ice is melted at its melting point?

a)
b)
c)
37.

Which formula would you use to calculate the heat absorbed when water is heated from 10°C to 20 °C?

a)
b)
c)
38.

Which formula would you use to calculate the heat absorbed when water is boiled at 100°C?

a)
b)
c)
39.

Which formula would you use to calculate the heat released when water is frozen at 0°C?

a)
b)
c)
40.

Which formula would you use to calculate the heat released when water vapor condenses to a liquid?

a)
b)
c)
41.

During a flame test, sodium chloride produces an intense yellow flame. This yellow color is produced when electrons in excited atoms

a)

are gained by the atoms

b)

are lost by the atoms

c)

move to higher energy states within the atoms

d)

move to lower energy states within the atoms

42.
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
43.

Based on the information in the table, which two atoms are isotopes of the same element?

a)

A and D

b)

A and Z

c)

X and D

d)

X and Z

44.

Which two notations represent different isotopes of the same element?

a)
b)
c)
d)
45.
Valence electrons are the...
a)
Innermost electrons
b)
Middle electrons
c)
Outermost electrons
d)
Any electrons
46.

The unknown emissions spectra belongs to the element

a)

Hydrogen

b)

Mercury

c)

Neon

d)

Helium

47.

Which energy level of Calcium has the most energy?

a)

1st

b)

2nd

c)

3rd

d)

4th

48.
An atom becomes _________ when it gains electrons.
a)
Positive
b)
Negative
c)
Neutral
d)
Invinsible
49.
An atom becomes _______ when it loses electrons.
a)
Positive
b)
Negative
c)
Neutral
d)
Invinsible
50.

Most elements on the periodic table are classified as ____________.

a)

Gases

b)

Metalloids

c)

Metals

d)

Nonmetals

51.

Which accurately describes nonmetals?

a)

Poor conductors of electricity

b)

Often used in computer parts

c)

Both malleable and ductile

d)

Both dull and brittle

52.
As you move across the periodic table atoms tend to get smaller because, ______________.
a)
the atoms have more mass.
b)
the atoms have less mass
c)
the atoms have more protons.
d)
the atoms have less electrons.
53.
A nuclear reaction where a nucleus splits into two smaller nuclei is... 
a)
Fission
b)
Fusion
c)
Gamma decay
d)
Beta decay
54.
Which type of nuclear radiation is being emitted here?
a)
alpha
b)
beta
c)
gamma
d)
none
55.
Which type of nuclear radiation is being emitted here?
a)
Alpha
b)
beta
c)
gamma 
d)
none
56.
Balance the following equation:
146C --> 0-1e + ________
a)
145B
b)
146C
c)
147N
d)
42He
57.
Two or more nuclei combine to form one larger nucleus in the process of nuclear _____.
a)
Fusion
b)
Fission
c)
Tracing
d)
Decay
58.
When nuclei decay, massive amounts of __________ is released.
a)
energy
b)
jello
c)
protons
d)
neutrons
59.
The time needed for half of a radioactive sample to decay is called its __________.
a)
decay period
b)
period
c)
transmutation time
d)
half-life
60.
In a correctly written symbol what would be located in the "A" position?
a)
number of neutrons
b)
atomic number
c)
number of electrons 
d)
mass number
61.
Radioactive materials have unstable...
a)
electrons
b)
protons
c)
nuclei
d)
neutrons
62.
Which produces more energy--nuclear fission or nuclear fusion?
a)
Fusion
b)
Fission
c)
They produce the same amount
d)
It depends on the elements used
63.

In order of most to least penetrating radiation we have

a)

Alpha , Beta, Gamma

b)

Beta , Gamma , Alpha

c)

Gamma, Beta, Alpha

d)

Gamma, Alpha, Beta

64.
This happens naturally due to an unstable nucleus.
a)
fission
b)
fusion
c)
radioactive decay
d)
K-capture
65.

Which reaction represents fusion?

a)
b)
c)
d)
66.

Which reaction represents fission?

a)
b)
c)
d)
67.

What type of nuclear reaction does this equation represent?

a)

Fission

b)

Fusion

c)

Natural Decay

d)

Artificial Transmutation

68.

What does the unit atmosphere, atm, measure?

a)

Pressure

b)

Temperature

c)

Volume

d)

Moles

69.

What is the Standard for Temperature and Pressure?

a)

273 K and 1 atm

b)

273 C and 1 kPa

c)

273 F and 1 mmHg

d)

273 K and 1 Torr

70.

What does the unit Kelvin, K, measure?

a)

Pressure

b)

Volume

c)

Mass

d)

Temperature

71.

What does the unit Liters, L, measure?

a)

Volume

b)

Pressure

c)

Temperature

d)

Moles

72.

Which of the following set of conditions would allow a gas to behave ideally?

(HINT: Remember that gases like to spread far apart! Which conditions would allow the molecules to easily spread apart?)

a)

High Temperature, Low Pressure

b)

High Temperature, High Pressure

c)

Low Temperature, High Pressure

d)

Low Temperature, Low Pressure

73.
Definite shape and a definite volume.
a)
Gas
b)
Liquid
c)
Solid
74.
When the temperature of matter increases the particles...
a)
speed up and move closer
b)
speed up and move farther apart
c)
slow down and move closer together
d)
slow down and move farther apart
75.
Gases have...
a)
A definite shape and volume
b)
A definite shape but no definite volume
c)
No definite shape but a definite volume
d)
No definite shape or volume
76.
Which of the following would increase the (gas) pressure of a system?
a)
Increase the Temperature
b)
Pump in more gas
c)
Decrease the volume
d)
All of these
77.
If a balloon is cooled what will happen to the volume?
a)
Volume will increase
b)
Volume will decrease
c)
Volume will not change
78.

A hypothetical gas that perfectly fits all the assumptions of the kinetic molecular theory is known as

a)

real gas

b)

ideal gas

c)

imaginary gas

d)

perfect gas

79.

Which among the following is NOT true regarding the Kinetic Molecular Theory of gases?

a)

Gases particles move in straight lines.

b)

Gas particles are closely packed and their motion is orderly.

c)

Gas particles are in constant motion.

d)

Gas particles do not attract or repel each other.

80.
True or false: melting and freezing occur at the same temperature!
a)
True
b)
False
c)
I don't know
81.
At what temperature do nitrogen molecules move fastest?
a)
350 K
b)
300 K
c)
250 K
d)
200 K
82.
Gas laws involve what three variables?
a)
Solid Liquid Gas 
b)
Speed Velocity Acceleration 
c)
Elements Compounds Mixtures 
d)
Pressure Temperature Volume 
83.

You see this question on your midterm, "If a gas at 25.0 °C occupies 3.60 liters at a pressure of 1.00 atm, what will be its volume at a pressure of 2.50 atm?"

Which equation from your reference table should you use?

a)

b)

c)

d)

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