Assertion : The binding energy per nucleon,fo | vedclass

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(C) The binding energy per nucleon decreases for nuclei with $A > 100$ because the nuclear force is short-ranged,while the Coulomb repulsion between p

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If the Assertion is correct but Reason is incorrect.

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(C) The binding energy per nucleon decreases for nuclei with $A > 100$ because the nuclear force is short-ranged,while the Coulomb repulsion between protons is long-ranged.As the mass number $A$ increases,the size of the nucleus increases. Since the nuclear force acts only between nearest neighbors,the total nuclear binding energy increases roughly linearly with $A$.However,the Coulomb repulsion acts between all pairs of protons,and the number of pairs increases as $A^2$. This causes the net binding energy per nucleon to decrease for heavier nuclei.The Reason statement is technically incorrect because the nuclear force itself does not become 'weak' for heavier nuclei; rather,its short-range nature means it cannot compensate for the long-range Coulomb repulsion as the nucleus grows larger.

Assertion : The binding energy per nucleon,for nuclei with atomic mass number $A > 100$,decreases with $A$.
Reason : The nuclear forces are weak for heavier nuclei.

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Assertion : The binding energy per nucleon,for nuclei with atomic mass number $A > 100$,decreases with $A$.Reason : The nuclear forces are weak for heavier nuclei.