Nuclear Physics And Radioactivity Question 331

Question: An artificial radioactive decay series begins with unstable $ _{94}^{241}Pu $ . The stable nuclide obtained after eight $ \alpha - $ decays and five $ \beta - $ decays is [SCRA 1998]

Options:

A) $ _{83}^{209}Bi $

B) $ _{82}^{209}Pb $

C) $ _{82}^{205}Ti $

D) $ _{82}^{201}Hg $

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Answer:

Correct Answer: A

Solution:

Mass number decreases by $ 8\times 4=32 $ Atomic number decreases by $ 8\times 2-5=11 $