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Unit 3 Exam - Nuclear Chemistry Review

Total questions: 50

Worksheet time: 25mins

Name
Class
Date
1.

Which reaction produces harmful radioactive waste?

a)

Fission

b)

Photosynthesis

c)

chain reaction

d)

Fusion

2.

_____is the joining of atomic nuclei

a)

Fusion

b)

chain reaction

c)

Photosynthesis

d)

Fission

3.

_______is the splitting of atomic nuclei

a)

Fission

b)

nuclear reaction

c)

Fusion

d)

bayler reaction

4.
What is a chain reaction?
a)
When electrons are emitted causing electricity
b)
When a nuclear fission reaction occurs, the protons emitted can strike other nuclei in the sample, and cause them to split
c)
When a nuclear fission reaction occurs, the neutrons emitted can strike other nuclei in the sample, and cause them to split
d)
When a nuclear fission reaction occurs, the electrons emitted can strike other nuclei in the sample, and cause them to split
5.

How is the alpha particle written in a nuclear equation?

a)

42He

b)

24He

c)

0-1e

d)

00γ

6.
Which type of nuclear radiation is being emitted here?
a)
Alpha
b)
beta
c)
gamma 
d)
none
7.
Solve this equation for alpha decay.
85209At = ___ + 24He
a)
83205Bi
b)
86209Rn
c)
81207Tl
d)
85208At
8.

Gamma rays have

a)

no mass

b)

a huge mass

c)

a small mass

d)

an average mass

9.
Solve this equation for beta decay.
614C = ___ + -10e
a)
410Be
b)
714N
c)
210He
d)
613C
10.

During beta-particle emission, a neutron splits into a____________________.

a)

proton and electron

b)

neutron and electron

c)

neutron and proton

11.
Has the symbol
a)
Alpha
b)
Beta 
c)
Gamma
12.
Has the highest penetrating power.  Can penetrate our body.  Even several cm thick of lead or several meters thick of concrete cannot stop all of it.
a)
Alpha
b)
Beta
c)
Gamma
13.

Has the lowest penetrating power.  Can only penetrate 0.05 mm into the body and can be stopped by the skin.

a)
Alpha
b)
Beta
c)
Gamma
d)

Electron capture

14.
Uranium-238  decays into  Thorium-234  by emitting .........
a)
an alpha particle
b)
a beta particle
c)
gamma rays
d)
visible light
15.
Radioactive materials have unstable...
a)
electrons
b)
protons
c)
nuclei
d)
neutrons
16.
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
17.
What is the half-life of iodine-131?
a)
32 days
b)
8 days
c)
16 days
d)
24 days
18.

The % of the parent isotope remaining after 2 Half Lives.

a)

50%

b)

25%

c)

12.5%

d)

6.25%

19.
What is Half-life?
a)
The amount of time it takes for some of the nuclei in a sample of the isotope to decay
b)
The amount of time it takes for half the electrons in a sample of the isotope to decay
c)
The amount of time it takes for half the nuclei in a sample of the isotope to decay
d)
the amount of time it takes to double the nuclei in a sample of the isotope to decay
20.

Which of the following BEST describes what occurs in a fusion reaction?

a)

Two low mass nuclei are joined to form one nucleus and gives off energy.

b)

A single nucleus divides into two or more nuclei and gives off energy.

c)

Electrons are shared between the nuclei.

d)

A chemical reaction occurs between the nuclei.

21.

The high energy yields created by nuclear fission are due to...

a)

binding nuclei.

b)

hydrogen bonding.

c)

secondary recovery.

d)

chain reactions.

22.

How many half-lives does it take a radioactive substance to decay until only one-eighth of the original substance remains?

a)

two

b)

three

c)

six

d)

eight

23.

The half-life for a 100-gram sample of radioactive element X is 5 days. How much of element X remains after 10 days have passed?

a)

25g

b)

50g

c)

75g

d)

100g

24.

What occurs in a nuclear power plant when Uranium-235 splits into two smaller isotopes?

a)

nuclear fusion

b)

nuclear fission

c)

a chemical reaction

d)

a neutralization reaction

25.

What is the correct # of protons, electrons, and neutrons for Cobalt - 59?

a)

27 protons, 59 electrons, & 27 neutrons

b)

59 protons, 59 electrons, & 86 neutrons

c)

27 protons, 27 electrons, & 32 neutrons

d)

27 protons, 32 electrons, & 27 neutrons

26.

What is the name of this isotope?

a)

Germanium-32

b)

Germanium-72

c)

Germanium-72.64

d)

Hafnium-72

27.

What is an isotope?

a)

Atoms of the same element with different masses.

b)

Atoms of the same element with different # of protons.

c)

Atoms of the same element with different atomic numbers.

d)

Atoms of the same element with the different # of electrons.

28.

What type of radioactive decay is pictured here?

a)

Alpha decay

b)

Beta decay

c)

Gamma decay

d)

Positron decay

29.
Balance the following equation:
146C --> 0-1e + ________
a)
145B
b)
146C
c)
147N
d)
42He
30.

In the symbol 167N what the 7 stand for?

a)

Mass number

b)

Atomic number

c)

Atomic mass

d)

Number of neutrons

31.

What does an atom emit during beta decay?

a)

a proton

b)

a neutron

c)

an electron

d)

high-energy waves

32.

If an atom of Americium-231 (Am) goes through alpha decay, what would you have at the end?

a)

Neptunium-227

b)

Neptunium-234

c)

Plutonium-231

d)

Curium-247

33.

After 22,800 years, approximately what percentage of the original carbon-14 remains?

a)

15%

b)

12.5%

c)

6.25%

d)

3.125%

34.
In the symbol 20682Pb what does 206 stand for?
a)
Mass number
b)
Atomic number
c)
Atomic mass
d)
Number of protons
35.

If an atom of potassium-40 (K) goes through gamma decay, what would you have at the end?

a)

Potassium-40

b)

Calcium-40

c)

Argon-35

d)

Potassium-39

36.

Which reaction releases more energy?

a)

Fission

b)

chain reaction

c)

Fusion

d)

Photosynthesis

37.

Which choice is the correct alpha decay of uranium-238?

a)
b)
c)
d)
38.

What type of decay does this symbol represent?

a)

beta decay

b)

alpha decay

c)

fission

d)

fusion

39.

What type of decay does this symbol represent?

a)

beta decay

b)

alpha decay

c)

gamma decay

d)

fusion

40.

The bottom number in alpha decay tells you the _____________ of the element.

a)

identity

b)

mass

c)

mass number

d)

symbol

41.

Solve the nuclear decay reaction:

a)
b)
c)
d)
42.

Solve the nuclear decay reaction:

a)
b)
c)
d)
43.
What is emitted during Alpha Radiation?
a)
A helium nuclei.
b)
A helium atom
c)
Gamma Rays.
d)
Positrons
44.

In alpha decay when the top number decreases by 4, what are you actually losing?

a)

2 protons & 2 neutrons

b)

4 protons

c)

2 protons & 2 electrons

d)

2 electrons & 2 neutrons

45.
The type of radioactive particle that can be stopped by a sheet of paper is the ____.
a)
alpha particle
b)
beta particle
c)
gamma ray
d)
uranium
46.
Negatively charged particles emitted from a nucleus at a high speed are ____.  
a)
alpha particle
b)
gamma rays
c)
beta particles
d)
X rays
47.

Gamma rays _________.

a)

have no mass and no charge

b)

have mass but no charge

c)

have no mass but have charge

d)

have mass and charge

48.

finish the equation


18173Ta --> ____ + 18174W

a)

42He

b)

0-1e

c)

y

49.

Solve this equation.

85209At = ___ + 24He

a)

83205Bi

b)

86209Rn

c)

81207Tl

d)

85208At

50.

In a correctly written symbol what would be located in the "Z" position?

a)

number of neutrons

b)

atomic number

c)

number of electrons

d)

mass number

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