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WorksheetsRadioactive decay and nuclear fusion/fission
Total questions: 15
Worksheet time: 48mins
Name
Class
Date
1.
The splitting of a nucleus into smaller nuclei is
a)
fusion
b)
fission
c)
decay
d)
gamma radiation
2.
Which of these statements correctly describes how the chain reaction occurs in nuclear fission.
a)
Uranium releases electrons to create electricity
b)
When a nuclear fission reaction occurs, the electrons 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)
Protons and neutrons change to electrons because the nuclei are so big
3.
Which type of radioactive decay gives off energy only?
a)
alpha
b)
beta
c)
gamma
4.
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
5.
What is emitted during Alpha Radiation?
a)
A helium nuclei
b)
An electron
c)
Gamma Rays
d)
A neutron
6.
What is a chain reaction?
a)
When electrons travel 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
7.
Takes two small nuclei and combines them into a larger nucleus
a)
fission
b)
fusion
8.
Alpha particles have a _____ charge.
a)
+2
b)
0
c)
+4
d)
-1
9.
The beta particle has a charge of ...........
a)
+1
b)
-1
c)
0
d)
+2
10.
What metal gives off radiation?
a)
carbon
b)
cobalt
c)
uranium
d)
titanium
11.
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
12.
After the third half-life, how much of the sample is left?
a)
1/2
b)
1/3
c)
1/16
d)
1/8
13.
If 10 mg of iodine 131 is given to a patient, how much is left after 24 days? The half-life of iodine-131 is 8 days.
a)
1.25mg
b)
1.25g
c)
10g
d)
10mg
14.
If the half-life of uranium-232 is 70 years, how many half-lives will it take for 10 g of it to be reduced to 1.25 g?
a)
1 half-life
b)
2 half-lives
c)
3 half-lives
d)
4 half-lives
15.
The % of the parent isotope remaining after 2 Half Lives.
a)
50%
b)
25%
c)
12.5%
d)
6.25%
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