Nuclear Fission and Nuclear Fusion Answers
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Which best describes nuclear fission?
A
A nucleus spontaneously splits and absorbs energy.B
Two nuclei spontaneously combine and absorb energy.C
A nucleus collides with a neutron and splits, releasing energy.D
Nuclei combine to form a heavier nucleus, releasing energy.2
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Which element is nuclear fusion least likely to produce?
A
hydrogen, which has an approximate mass of 1B
chlorine, which has an approximate mass of 35C
argon, which has an approximate mass of 39D
silicon, which has an approximate mass of 283
Which type of reaction does this diagram represent?
A
nuclear fusion because nuclei combine to form a heavy nucleusB
nuclear fission because an atom is splitting into two large fragments of comparable massC
nuclear fusion because a large amount of energy is being releasedD
nuclear fission because the resulting products are not radioactive4
Which statement is true about this reaction?
A
It is a practical source of energy on Earth.B
It occurs only outside the solar system.C
Its product is heavier than each of its reactants.D
It shows the critical mass of an element.5
According to most scientists, cold fusion
A
will not be a practical source of energy on Earth.B
would be a practical source of energy on Earth if it were less expensive.C
will be a practical source of energy on Earth within the next few decades.D
will always continue to be a practical source of energy on Earth.6
How does critical mass play a role in nuclear reactions?
A
It is the minimum amount of material needed to start a fission reaction.B
It is the minimum amount of material needed to start a fusion reaction.C
It is the minimum amount of material needed to sustain a fission reaction.D
It is the minimum amount of material needed to sustain a fusion reaction.7
Which best describes what forms in nuclear fusion?
A
two smaller, more stable nucleiB
two larger, less stable nucleiC
one smaller, less stable nucleusD
one larger, more stable nucleus8
Which is a characteristic of nuclear fusion?
A
produces radioactive wasteB
involves the collision of two nucleiC
commonly used by humans as an energy sourceD
requires very little activation energy9
Which is most likely why many scientists reject the cold fusion theory?
A
There is too much waste involved in the process.B
Cold fusion experiments have been conducted at room temperature only.C
The process does not produce enough energy to meet the needs of modern humans.D
The original results have not been replicated consistently and reliably.10
Why is it important for scientists to replicate each other’s experiments?
A
to determine if important scientific results are repeatableB
to help the research of other scientistsC
to determine if slight alterations in the experiment can affect the resultD
to further their own researchDid you find these answers helpful?
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