Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. Which of the following order of ionization energy is correct?

JIPMERJIPMER 2004Classification of Elements and Periodicity in Properties

Solution:

Ionisation energy generally increase in a period from left to right. But due to comparatively stabler configuration of Be $\left(1 s^{2},\, 2 s^{2}\right)$, it has more ionisation energy than Boron $\left(1 s^{2},\, 2 s^{2},\, 2 p^{1}\right)$. Hence, the correct order is : $B < Be < C < N$