Final answer:
Nuclear fusion and nuclear fission differ in terms of the type of reaction and the amount of energy released from a given mass of fuel.
Step-by-step explanation:
Nuclear fusion and nuclear fission are two types of nuclear reactions that release energy. Fusion combines two light atomic nuclei to form a heavier nucleus, while fission splits a heavy atomic nucleus into two or more lighter nuclei. The main difference between fusion and fission is that fusion releases more energy than fission from a given mass of fuel.
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