Question

${}_{13}^{27}Al$is a stable isotope. ${}_{13}^{29}Al$is expected to disintegrate by :

• A. $\alpha$ -emission
• B. $\beta$ -emission
• C. Positron emission
• D. Proton emission

Answer 1

Answer: (B)

$\beta$ -emission

Answer 2

Nucleides having $\frac{n}{p}$ > 1 undergoes $\beta$ -emission to decrease $\frac{n}{p}$ ratio in order to attain belt of stability