The set of molecules in which the central ato | vedclass

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(D) The octet rule,proposed by Lewis,states that atoms tend to bond such that they have $8$ electrons in their valence shell,achieving a stable noble

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$SF_6, PCl_5, XeF_2$

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(D) The octet rule,proposed by Lewis,states that atoms tend to bond such that they have $8$ electrons in their valence shell,achieving a stable noble gas configuration.In $SF_6$,the central $S$ atom has $12$ valence electrons.In $PCl_5$,the central $P$ atom has $10$ valence electrons.In $XeF_2$,the central $Xe$ atom has $10$ valence electrons.Since these central atoms do not have $8$ electrons,they are examples of an expanded octet and do not obey the octet rule.

Molecule	Hybridization	Geometry
$I$. $BrF_5$	$sp^3d^2$	Square pyramidal
$II$. $XeF_6$	$sp^3d^3$	Distorted octahedral
$III$. $SF_4$	$dsp^2$	Square planar
$IV$. $PbCl_2$	$sp$	Linear

The set of molecules in which the central atom does not obey the octet rule is

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Molecule Hybridization Geometry
$I$. $BrF_5$ $sp^3d^2$ Square pyramidal
$II$. $XeF_6$ $sp^3d^3$ Distorted octahedral
$III$. $SF_4$ $dsp^2$ Square planar
$IV$. $PbCl_2$ $sp$ Linear

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