We have to calculate the average binding energy per nucleon of , which has an atomic mass of 61.9238346 u. This nucleus has the greatest binding energy per nucleon of all the known stable nuclei.

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The atomic number of is 28. Therefore, nucleus has 28 protons and 34 neutrons. We will use the following data for calculating the mass defect:

,

and

Therefore, the mass defect of will be

As , the total binding energy of will be

Therefore, the average binding energy per nucleon of will be