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(B) The electron gain enthalpy of noble gases is positive due to their stable electronic configuration.Among the given noble gases, $Ne$ has the highe

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$Ne$

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(B) The electron gain enthalpy of noble gases is positive due to their stable electronic configuration.Among the given noble gases, $Ne$ has the highest electron gain enthalpy (most positive value).The values are approximately: $He$ (+$48$ kJ/mol), $Ne$ (+$116$ kJ/mol), $Kr$ (+$96$ kJ/mol), and $Xe$ (+$77$ kJ/mol).From $Ne$ downwards, the value becomes less positive as atomic size increases. $He$ has a lower positive value than $Ne$.Therefore, $Ne$ has the highest electron gain enthalpy among the options.

Among the options, the element with the highest electron gain enthalpy is

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