CUET · PHYSICS · PYQ PAPER 2023
Which of the following particles/rays is emitted in a radioactive decay in which neither the atomic number nor the mass number changes?
- A Proton
- B Gamma
- C Electron
- D Neutron
Answer & Solution
Correct Answer
(B) Gamma
Step-by-step Solution
Detailed explanation
Gamma rays are high-energy electromagnetic radiation (photons) with no mass or charge. When a nucleus in an excited state undergoes gamma decay, it releases excess energy without changing its number of protons (atomic number) or neutrons (mass number). B) Gamma
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