MHT CET 2023 Physics question

An isotope of the original nucleus can be formed in a radioactive decay, with the emission of following particles

(A)one and one particle
(B)one and two particlesCorrect
(C)one and four particles
(D)four and one particle

Answer: (B)

Solution

Isotopes have the same atomic number (but different mass number ). An emission reduces by 2 and by 4; each emission increases by 1 (and leaves unchanged). For the daughter to be an isotope of the parent, the net change in must be zero: $-2 + 1×

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Question ID VK-098002