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, the element with \[[Ne]\,3{{s}^{2}}3{{p}^{3}}\]configuration has highest ionisation energy.