question_answer

In the following, the element with the highest ionisation energy is :

A)  \[[Ne]\,3{{s}^{2}}3{{p}^{1}}\]                   

B)  \[[Ne]\,3{{s}^{2}}3{{p}^{3}}\]

C)  \[[Ne]\,3{{s}^{2}}3{{p}^{2}}\]                   

D)  \[[Ne]\,3{{s}^{2}}3{{p}^{4}}\]

Correct Answer: B

Solution :

    Elements having half filled or fully filled orbitals are more stable. Hence, much energy is required to remove an electron from the outermost orbit. So, \[[Ne]\,3{{s}^{2}}3{{p}^{3}}\] has highest ionisation energy.