Which of the following isotopes is normally fissionable?
Correct answer: C. U239
- A. U238
- B. U235
- C. U239
- D. He4
Explanation
B is the right option because Uranium-235 (U235) is normally fissionable. It can undergo nuclear fission upon absorption of a neutron, leading to the release of energy and more neutrons, which can sustain a chain reaction.
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