Which of the following is the smallest anion?

Question

Which of the following is the smallest anion? (A) O2- (B) S2- (C) Cl- (D) Br-

Tardigrade Admin · Accepted Answer

Solution The size of ion decreases in a period from left to right and increases on moving from top to bottom in a group. Hence, the order of ionic radii is as- Anion:

O^{2 -} < C l^{-} < S^{2 -} < B r^{-}

lonic radii:

142 p m 181 p m 184 p m 196 p m

Q. Which of the following is the smallest anion?

$O^{2 -}$

$S^{2 -}$

$C l^{-}$

$B r^{-}$

Solution The size of ion decreases in a period from left to right and increases on moving from top to bottom in a group. Hence, the order of ionic radii is as- Anion:
$O^{2 -} < C l^{-} < S^{2 -} < B r^{-}$ lonic radii: $142 p m 181 p m 184 p m 196 p m$