Question

Assertion :
The binding energy of the nucleus increases with the increase in atomic number.
Reason :
Heavier elements have a greater number of non-radioactive isotopes than radioactive isotopes.

• A. Both assertion and reason are correct and Reason is the correct explanation for assertion.
• B. Both assertion and reason are correct and Assertion is the correct explanation for Reason.
• C. Assertion is correct but reason is incorrect
• D. Both assertion and reason are incorrect

Answer 1

Answer: (C)

Assertion is correct but reason is incorrect

Answer 2

The correct answer is C) The binding energy is the energy generated when a nucleus is built up from its component nucleons. As a result, the binding energy of the nucleus equals the energy equivalent of the mass defect. Because there are more protons in a heavier nucleus, the internal repulsive forces are stronger, and less energy is required to remove a nucleon from the nucleus, hence the binding energy is lower. As a result, the binding energy is greater for lighter nuclei. The more binding energy there is, the more stable the nucleus.