DifferenceModerate2 marks
Give two differences between nuclear fission and nuclear fusion.
Topic: Nuclear fission and fusion
Question wording verified against source paper
Answer
Exam answer
Nuclear fission splits a heavy nucleus; nuclear fusion combines light nuclei.
Explanation
Fission can be initiated at comparatively ordinary conditions by neutron bombardment, while fusion requires extremely high temperature and pressure.
Comparison
| Basis | Nuclear fission | Nuclear fusion |
|---|---|---|
| Process | A heavy nucleus splits into two lighter nuclei with release of energy. | Two light nuclei combine to form a heavier nucleus with release of energy. |
| Conditions | Can be initiated by neutron bombardment at comparatively ordinary temperatures. | Requires extremely high temperature and pressure. |
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