The binding energy per nucleon for \( {}^{56}\mathrm{Fe} \) is
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 8.75 MeV
The binding energy per nucleon curve rises for light nuclei and reaches its maximum, about 8.75 MeV, at mass number 56. Iron-56 sits at this peak, which is why it is one of the most stable nuclei.
NCERT (2026-27):
Nuclear Binding Energy – “… Figure 13.1 is a plot of the binding energy per nucleon Ebn versus the mass number A for a large number of nuclei. … The curve has a maximum of about 8.75 MeV for A = 56 and has a value of 7.6 MeV for A = 238.”