The mass defect per nucleon is called
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Verified by ExpertsThe correct answer is:
B
The rest mass of the stable nucleus of a stable atom is always less than the sum of the masses of constituent nucleons.
The difference is called the mass defect 
(i.e., 
) is utilized in keeping the nucleons bound together. This energy is known as the binding energy.
In order to break the nucleus into its constituent nucleons an amount of energy equal to its binding energy has to be supplied to the nucleus. The mass defect per nucleon 
, is called the packing fraction of the nucleus.
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