Nuclear Chemistry Question 1

Question: $ _{11}^{23}Na $ is the more stable isotope of Na. Find out the process by which $ _{11}^{24}Na $ can undergo radioactive decay

[IIT Screening 2003]

Options:

A) $ {{\beta }^{-}} $ emission

B) $ \alpha $ emission

C) $ {{\beta }^{+}} $ emission

D) K electron capture

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Answer:

Correct Answer: A

Solution:

$ _{11}^{23}Na\to \frac{n}{p}ratio=12/11 $

$ _{11}^{24}Na\to \frac{n}{p}ratio=23/11 $ so decrease in $ \frac{n}{p} $ ratio gives out $ \beta $ -particle $ n\to p+e({{\beta }^{-}}) $ .