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(B) $1$. For $XeF^{-}_5$: The structure is pentagonal planar with two lone pairs above and below the plane. The central $Xe$ atom and the five $F$ ato

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$SF_6$

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(B) $1$. For $XeF^{-}_5$: The structure is pentagonal planar with two lone pairs above and below the plane. The central $Xe$ atom and the five $F$ atoms lie in the same plane. Thus,the number of atoms in the $XY$ plane is $6$.$2$. For $SF_6$: The structure is octahedral. The central $S$ atom and four $F$ atoms lie in the equatorial plane. Thus,the number of atoms in the $XY$ plane is $5$.$3$. For $IF_7$: The structure is pentagonal bipyramidal. The central $I$ atom and five $F$ atoms lie in the equatorial plane. Thus,the number of atoms in the $XY$ plane is $6$.$4$. Comparing the values: $SF_6$ has the minimum number of atoms $(5)$ in the $XY$ plane.

Which of the following species contains the minimum number of atoms in the $XY$ plane?

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