Which of the following statements is correct?

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(A) The mass of a stable nucleus is always less than the sum of the masses of its constituent protons and neutrons. This difference in mass is known a

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The rest mass of a stable nucleus is less than the sum of the rest masses of its separated nucleons.

Vedclass · Answer

(A) The mass of a stable nucleus is always less than the sum of the masses of its constituent protons and neutrons. This difference in mass is known as the mass defect $(\Delta m)$.According to Einstein's mass-energy equivalence principle $(E = \Delta m c^2)$, this mass defect is converted into binding energy, which holds the nucleus together.Since energy is released when a nucleus is formed, the system reaches a lower energy state, meaning the mass of the bound nucleus must be less than the sum of the masses of its individual nucleons.Therefore, option $A$ is the correct statement.

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