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Concepts Of Physics MCQ Edition [Volume 2]PhysicsThe Nucleus

During a radioactive decay process, both the atomic number and the mass number remain unchanged. Identify the particle that is emitted in this decay.

Options

  1. AProton
  2. BNeutron
  3. CPhoton
  4. DElectron

Correct answer

C. Photon

Step-by-step solution

In a radioactive decay process, if both the atomic number and the mass number of the nucleus remain unchanged, the decay corresponds to gamma emission. During gamma decay, a nucleus in an excited state transitions to a lower energy state by emitting a high-energy electromagnetic radiation, which is a photon. For the other options: Proton emission decreases both the atomic number and the mass number by 1 . Neutron emission decreases the mass number by 1 while the atomic number remains unchanged. Electron emission (b

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