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Section 4: Fission and Fusion of Atomic Nuclei

Fission and Fusion of Atomic Nuclei

1.

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If one fission reaction of a uranium-235 atom produced two neutrons, how many neutrons would be released if the chain reaction occurred three more times?
A)2
B)4
C)8
D)16
2.
To hold the nucleons together in the nucleus, energy is required. What is the name of this energy?
A)binding energy
B)kinetic energy
C)thermal energy
D)free energy
3.
What is the name of the process in which a large radioactive isotope is broken into smaller isotopes?
A)transmutation
B)nuclear fission
C)nuclear fusion
D)beta emission
4.
What is the name given to the amount of a radioactive substance that is massive enough to sustain a chain reaction?
A)critical mass
B)critical condition
C)mole
D)mass defect
5.
In a nuclear reactor, what is the heat generated by the nuclear fission reaction used for?
A)fusing other unstable isotopes together
B)generating steam
C)freezing water
D)making building products
6.
The energy produced by the Sun is a result of ___________.
A)nuclear fission
B)alpha emission
C)nuclear fusion
D)radiocarbon dating
7.
The reaction products of nuclear fusion are __________ than the reactants.
A)more massive
B)less massive
C)less radioactive
D)cooler
8.
What is the major problem associated with the development of fusion as a controlled energy source?
A)The containment of the radioactive decay products.
B)The low energy yield of the fuel.
C)The containment of the extremely high-temperature plasma.
D)The resulting air pollution.
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