Question

The number of bonding pairs electron $\left(X\right)$ and lone pairs electron $\left(Y\right)$ around the central atom in the $I_3^{-}$ ion are $X+Y$:

• A. $22$
• B. $23$
• C. $32$
• D. $43$

Answer 1

Answer: (A)

$22$

The number of bonding pairs electron $\left(X\right)=2\times 2=4$

Total no. of lone pairs electron $Y=3\times 3\times 2=18$

$X+Y=4+18=22$
Option A is the correct answer.