Which of the following noble gases has the highest positive electron gain enthalpy value?

Helium

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Krypton

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Argon

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Neon

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Xenon

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Solution

The correct option is B Neon
Noble gas Electron gain enthalpy
$(k J m o l^{- 1})$
$H e$ $48$
$N e$ $116$
$A r$ $96$
$K r$ $96$
$X e$ $77$

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Electron gain enthalpy values of noble gases are positive because:

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Noble gas	Electron gain enthalpy $(k J m o l^{- 1})$
$H e$	$48$
$N e$	$116$
$A r$	$96$
$K r$	$96$
$X e$	$77$