Answer :
Final answer:
In enriched uranium, a free neutron from U-235 decay would most likely cause another atom to split.
Explanation:
In a sample of enriched uranium, a free neutron from a decaying U-235 atom would be most likely to cause another atom to split. Enriched uranium has a higher concentration of the fissionable isotope U-235, increasing the probability of neutron-induced fission reactions.
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