Which produces more energy: the fissioning of a single uranium nucleus or the fusing of a pair of deuterium nuclei into a helium-4 nucleus?
A) Fusing a pair of deuterium nuclei produces more energy because there is a greater decrease in mass per nucleon.
B) Fissioning a single uranium nucleus produces more energy because its change in mass is much greater than that of a pair of deuterium nuclei.
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