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Name: ____________________________________
1.
Given the reaction:
Which particle is represented by X?
1. alpha 3. neutron
2. beta 4. proton
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2.
The half-life of a radioactive isotope is 20.0 minutes. What is the total amount of a 1.00-gram
sample of this isotope remaining after 1.00 hour?
1. 0.500 g 3. 0.250 g
2. 0.333 g 4. 0.125 g
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3.
Gamma rays are emanations that have
1. mass but no charge
2. charge but no mass
3. neither mass nor charge
4. both mass and charge
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4.
After 30 days, 5.0 grams of a radioactive isotope remains from an original 40.-gram sample.
What is the half-life of this element?
1. 5 days 3. 15 days
2. 10 days 4. 20 days
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5.
Which kind of particle, when passed through an electric field, would be attracted to the
negative electrode?
1. an alpha particle 3. a neutron
2. a beta particle 4. an electron
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6.
Compared to an ordinary chemical reaction, a fission reaction will
1. release smaller amounts of energy
2. release larger amounts of energy
3. absorb smaller amounts of energy
4. absorb larger amounts of energy
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7.
Figure 1
The diagram shows a nuclear reaction in which a neutron is captured by a heavy nucleus. Which type of reaction is
illustrated by the diagram?
1. an endothermic fission reaction
2. an exothermic fission reaction
3. an endothermic fusion reaction
4. an exothermic fusion reaction
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8.
A positively charged particle has great difficulty penetrating a target nucleus because the target nucleus has
1. a positive charge, which repels the particle
2. a negative charge, which attracts the particle
3. the protection of surrounding electrons
4. a very high binding energy
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9.
Which radioactive emanations have a charge of 2+?
1. alpha particles 3. gamma rays
2. beta particles 4. neutrons
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10.
Which equation represents nuclear disentegration resulting in release of a beta particle?
1.
2.
3.
4.
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11.
Which kind of radiation will travel through an electric field on a pathway that remains unaffected by the field?
1. a proton 3. an electron
2. a gamma ray 4. an alpha particle
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12. 18.
Which equation represents a fusion reaction? Which type of radiation has neither mass nor
charge?
1. gamma 3. alpha
1.
2. neutron 4. beta
2.
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3. 19.
Given the reaction:
4.
Which type of
-------------- reaction is represented?
13.
Which reaction represents natural nuclear 1. natural transmutation
decay? 2. artificial transmutation
3. fission
4. fusion
1.
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2.
20.
According to Table N, which radioactive
3.
isotope is best for determining the actual age
of Earth?
4.
238 60
1. U 3. Co
90 14
-------------- 2. Sr 4. C
14. --------------
Which type of emission has the highest 21.
penetrating power? Which statement explains why nuclear waste
1. alpha 3. positron materials may pose a problem?
2. beta 4. gamma
1. They frequently have short half-lives
-------------- and remain radioactive for brief
15. periods of time.
2. They frequently have short half-lives
Given the fusion reaction: + →X+ and remain radioactive for extended
energy Which particle is represented by X? periods of time.
3. They frequently have long half-lives
and remain radioactive for brief
1. periods of time.
4. They frequently have long half-lives
2. and remain radioactive for extended
periods of time.
3.
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4.
22.
Which type of radioactive emission has a
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positive charge and weak penetrating power?
16.
1. alpha particle 3. gamma ray
Which product of nuclear decay has mass but
no charge? 2. beta particle 4. neutron
1. alpha 3. gamma rays --------------
particles 23.
2. neutrons 4. beta Which of these types of nuclear radiation has
positrons the greatest penetrating power?
-------------- 1. alpha 3. neutron
17. 2. beta 4. gamma
As a sample of the radioactive isotope 131I --------------
decays, its half-life
1. decreases
2. increases
3. remains the same
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24.
Given the nuclear reaction:
This reaction is an example of
1. fission
2. fusion
3. artificial transmutation
4. natural transmutation
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25.
Nuclear fusion differs from nuclear fission
because nuclear fusion reactions
1. form heavier isotopes from lighter
isotopes
2. form lighter isotopes from heavier
isotopes
3. convert mass to energy
4. convert energy to mass
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Answer Key for Radioactivity
1. 2 10. 4 19. 2
2. 4 11. 2 20. 1
3. 3 12. 1 21. 4
4. 2 13. 3 22. 1
5. 1 14. 4 23. 4
6. 2 15. 4 24. 4
7. 2 16. 2 25. 1
8. 1 17. 3
9. 1 18. 1
