Which is not the correct order for the stated property

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Ba>Sr>Mg: atomic radius

F > 0 > N: first ionisation enthalpy

CI> F >I: electron affinity

0 Te: electronegativity

answer is B.

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Detailed Solution

On moving along the period, ionisation enthalpy increases. In second period. the order of ionisation enthalpy should be as follows : F > 0 > N:But N has half-filled structure. therefore, it is more stable than O. That's why its ionisation enthalpy is higher than O Thus, the correct order of IE is F > N > O..

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