Question

The correct order of ionization energy among the following is:

• A. $N>O$
• B. $Be>B$
• C. $C>B$
• D. All of the above

Answer 1

The correct option is D All of the above

Ionization energy increases as we move from left to right along the period . However due to half-filled configuration of N ($1s^{2}2s^{2}2p^3$), and completely filled electronic configuration of Be ($1s^{2}2s^2$), their ionization energies are greater than their corresponding consecutive element in the period.