Question detail

What is a key difference between nuclear fusion and nuclear fission?

Try the question, check the answer, then read the explanation to understand the curriculum point.

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At a glance

MCQ

Type

practice

Style

Topic

Nuclear fission and fusion

Question

A. Fusion releases energy; fission does not.
B. Fusion involves light nuclei; fission involves heavy nuclei.
C. Fusion is uncontrolled; fission is controlled.
D. Fusion produces neutrons; fission does not.

Answer

The correct answer is B: Fusion involves light nuclei; fission involves heavy nuclei..

Explanation

The correct answer is B: Fusion involves light nuclei; fission involves heavy nuclei.. This supports the learning objective "(Physics only) Define nuclear fusion as the joining of two light nuclei to form a heavier nucleus." in Nuclear fusion (physics only) because it uses the correct atomic and nuclear radiation relationship for Nuclear fission and fusion. The other options are less suitable because they do not match the required Nuclear fusion (physics only) idea: Fusion releases energy; fission does not.; Fusion is uncontrolled; fission is controlled.; Fusion produces neutrons; fission does not..

Common mistake

Misunderstanding Fusion Definition

Students often confuse nuclear fusion with nuclear fission, thinking both involve splitting nuclei.

Remember that nuclear fusion is specifically the joining of two light nuclei to form a heavier nucleus, while fission is the splitting of a large unstable nucleus.

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