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Concepts Of Physics MCQ Edition [Volume 2]PhysicsThe Nucleus

In the case of nuclei having A > 100 ,

Options

  1. Aenergy is released if two nuclei undergo fusion to form a larger nucleus
  2. Bthe binding energy per nucleon, on average, decreases as A increases
  3. Cenergy is released if the nucleus splits into two approximately equal fragments
  4. Dthe binding energy of the nucleus, on average, decreases as A increases

Correct answer

C. energy is released if the nucleus splits into two approximately equal fragments

Step-by-step solution

The binding energy per nucleon ( BE A ) curve reaches its maximum at A 56 and then gradually decreases for larger values of A . For A > 100 , the BE A value decreases as A increases. Thus, option (2) is correct. If a nucleus with A > 100 splits into two approximately equal fragments, the mass number of each fragment will be A 2 . Since A 2 is closer to 56 than A , the fragments will have a higher binding energy per nucleon than the original nucleus. This increase in total binding energy means that energy is release

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