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NDA 2023 GAT · General Knowledge · Nuclear and Modern Physics · hard

The binding energy per nucleon is maximum for nuclei of mass number near

Single correct option

The binding energy per nucleon is maximum for nuclei of mass number near
  1. A. 56 (iron)
  2. B. 2 (hydrogen)
  3. C. 4 (helium)
  4. D. 238 (uranium)
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Answer: (A) 56 (iron)

The binding energy per nucleon curve rises steeply for light nuclei, peaks at about 8.8 MeV near mass number 56, and falls slowly for heavy nuclei. This is why fusion of light nuclei and fission of heavy nuclei both release energy.
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