NEET | 2016Periodic TableHard

Question

In which of the following options the order of arrangement does not agree with the variation of propertyindicated against it?

Options

A.

Al3+ < Mg2+ < Na+ < F- (increasing ionic size)

B.

B < C < N < O (increasing first ionization enthalpy)

C.

I < Br < Cl < F (increasing electron gain enthalpy)

D.

Li < Na < K < Rb (increasing metallic radius)

Solution

N is having ns2 np3 (Half filled configuration). Hence has high IP than O which is having ns2 np4 electronic configuration.

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