Question

²³Na is the more stable isotope of Na. Find out the process by which ²⁴₁₁Na can undergo radioactive decay.

(a) β^- emission

(b) α emission

(c) β⁺ emission

(d) K electron capture

Answer 1

The correct option (a) β^- emission

Explanation:

Isotopic ²⁴₁₁Na is less stable than ²³₁₁Na because it shows radioactive decay.(less stability of ²⁴Na w.r.t. ²³Na is also based upon 13/11(n/p) ratio. higher the value of n/p, higher will be  unstability, so it is disintegrated to attain the stability).

Hence, isotopic sodium is changed into sodium by means of emission of β-particle and a proton ie, by β-emission.