Question

Increasing order of ionization energy is:

• A. Be < B < C < N
• B. N < C < Be < B
• C. B < Be < C < N
• D. C < N < Be < B

Answer 1

The correct option is C B < Be < C < N

I.E. energy increases from left to right in a period due to the increase in effective nuclear charge. But I.E. of Be > B due to filled 2s orbital stability. So the correct order is:

B < Be < C < N