Key Idea In a nuclear reaction conservation of charge number and mass number must hold good. Alpha particles are positively charged particles with charge +2e and mass 4 m. Emission of an α-particle reduces the mass of the radionuclide by 4 and its atomic number by 2. β-particles are negatively charged particles with rest mass as well as charge same as that of electrons. γ-particles carry no charge and mass. Radioactive transition will be as follows ZAX⟶Z+1AY+β−10Z+1AY⟶Z−1A−4β+α24Z+1A−4β⟶Z−1A−4β+γ00
In the nuclear decay given below _ Z^ A X longrightarrow _ Z+1^ A Y longrightarrow _ Z-1^ A-4 ~B^* longrightarrow _ Z-1^ A-4 ~B , the particles…
NEET UG 2009 — Physics Modern Physics
2009mcqmedium
In the nuclear decay given below ZAX⟶Z+1AY⟶Z−1A−4 B∗⟶Z−1A−4 B, the particles emitted in the sequence are
Official previous-year question
Held on 30 Apr 2009 · Verified 9 Jul 2026.
Options
- A
β,α,γ
- B
γ,β,α
- C
β,γ,α
- D
α,β,γ
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