A) \[{{\beta }^{-}}\]emission
B) \[\alpha -\]emission
C) \[{{\beta }^{+}}\] emission
D) K electron capture
Correct Answer: A
Solution :
\[n/p\] ratio of\[_{13}^{24}Na=13/11\]ie, greater than unity. To achieve stability, it would tend to become unity. This can happen if n decreases or p increases. To do so, a neutron changes into proton and an electron (\[\beta -\]particle) which is emitted. \[_{0}^{1}n\xrightarrow[{}]{{}}\,_{1}^{1}p{{+}_{-1}}{{e}^{0}}({{\beta }^{-}})\]
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