Intermolecular Forces

AP Chemistry· difficulty 4/5

Among the noble gases He, Ne, Ar, Kr, Xe, boiling point trend is

A
$Xe > Kr > Ar > Ne > He (heavier \to larger LDF \to higher bp)$
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B
$He > Xe > Ne > Kr > Ar$
C
$All approximately equal$
D
$He > Ne > Ar > Kr > Xe$

Explanation

LDF strength rises with electron count. Xe (54 e⁻) has strongest LDF, He (2 e⁻) weakest.

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