The sum of the number of lone pairs of electrons on each central atom in the following species is [TeBr_6]^ 2- , [BrF_2]^+ , SNF_3 , and [XeF_3]^- (Atomic numbers: N = 7, F = 9, S = 16, Br = 35, Te = 52, Xe = 54)

JEE Advanced 2017 Chemistry question

The sum of the number of lone pairs of electrons on each central atom in the following species is , , , and (Atomic numbers: N = 7, F = 9, S = 16, Br = 35, Te = 52, Xe = 54)

Answer: 6

Solution

: Te has electrons; 6 used in Te-Br bonds, leaving 1 lone pair. : Br has electrons; 2 used in bonds, leaving 2 lone pairs. : S

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Question ID VK-026619