Atoms & Nuclei

JEE Main level, single correct, medium

227 of 239

Question 227 of 239

The decay of a proton to neutron is :

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Answer: (B) possible only inside the nucleus

It is possible only inside the nucleus and not otherwise as it can not decay to a state of greater mass. Inside a nucleus however, the situation is different, as the binding energy of a nucleus provides the necessary energy to compensate for the neutron-proton mass difference.

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