The elements with highest and lowest electron | vedclass

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(C) In group $16$,the electron gain enthalpy becomes less negative as we move down the group due to an increase in atomic size.However,oxygen $(O)$ ha

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$S ; O$

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(C) In group $16$,the electron gain enthalpy becomes less negative as we move down the group due to an increase in atomic size.However,oxygen $(O)$ has an exceptionally low electron gain enthalpy due to its small size and strong inter-electronic repulsions.Therefore,sulfur $(S)$ has the highest (most negative) electron gain enthalpy,and polonium $(Po)$ or tellurium $(Te)$ depending on the context,but generally,oxygen is the lowest in the group.Comparing the options,sulfur $(S)$ has the highest and oxygen $(O)$ has the lowest electron gain enthalpy in group $16$.Thus,option $(C)$ is correct.

The elements with highest and lowest electron gain enthalpy in group $16$ respectively are

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