. For the second period elements the correct increasing order of first ionization enthalpy is


(a) Li < Be < B < C < O < N < F < Ne

(b) Li < Be < B < C < N < O < F < Ne

(c) Li < B < Be < C < O < N < F < Ne

(d) Li < B < Be < C < N < O < F < Ne

Best Answer

Correct Option is: (C)

Because of increased nuclear charge and decreased atomic radii, ionisation enthalpy increases as we progress through a period. However, because to the increased stability of half-filled and fully-filled orbitals, aberrant values are found for Be, N, and Ne.

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