Inert gases have positive electron gain entha | vedclass

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Question

(A) Noble gases have stable electronic configurations $(ns^2 np^6)$,which makes the addition of an electron highly unfavorable,resulting in positive e

Vedclass · Accepted Answer

$Xe < Kr < Ne < He$

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(A) Noble gases have stable electronic configurations $(ns^2 np^6)$,which makes the addition of an electron highly unfavorable,resulting in positive electron gain enthalpy values.The magnitude of positive electron gain enthalpy decreases as the atomic size increases down the group because the added electron enters a higher principal energy level,which is further from the nucleus.The order of electron gain enthalpy (positive values) for noble gases is $He > Ne > Ar > Kr > Xe$.Therefore,the correct increasing order is $Xe < Kr < Ar < Ne < He$. Given the options provided,the closest logical order representing increasing stability/energy requirement is $Xe < Kr < Ne < He$.

Inert gases have positive electron gain enthalpy. Its correct order is

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