In gamma ray emission from a nuleus (1) Both the neutron no. & proton no. changes (2) There is no change in mass no. & Atomic no. (3) Only the neutron no. changes (4) Only proton no. changes

Ans. 2

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when the electron excite and dexcite the electron emits the ray known as Gamma Ray. Hence,no change in mass no & atomic no.

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