Question

Arrange Be, B, C, N & O in decreasing order of ionization potential.​

Answer 1

Explanation:

Be < B< C < N < O Expected Order

B < Be < C < O < N This is the Correct Order .

Generally on moving Left to right Ionization potential increases

but here elements of period 2 as Be and N have fully filled and hll filled orbitals respectively so they are more stable and exchanges their position with B and O.