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← ScienceWhich outcome occurs when enriched uranium isotopes experience neutron moderation?
A)Sustained nuclear fission chain reaction✓
B)Increased alpha decay emission rate
C)Spontaneous nuclear fusion ignition
D)Decreased binding energy per nucleon
💡 Explanation
A sustained fission chain reaction occurs because neutron moderation increases the probability of neutron capture by uranium-235 isotopes, driving fission. Therefore, a chain reaction results, rather than decay, fusion, or reducing binding energy, which involve different mechanisms and conditions.
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