Arrange the given species F,F-,O and O- 2 in the order of their radii

Question

Arrange the given species F,F-,O and O- 2 in the order of their radii (A) O2 ->F->O>F (B) O2 ->F->F>O (C) F->O2 ->F>O (D) O2 ->O>F->F

Tardigrade Admin · Accepted Answer

Atomic radius decreases on going from left to right in a period. Thus size of O>F and size of anion is larger then their atoms. As O2 - and F- are isoelectronic, therefore, size of O2 ->F-.

Q. Arrange the given species $F, F^{-}, O$ and $O^{- 2}$ in the order of their radii

$O^{2 -} > F^{-} > O > F$

$O^{2 -} > F^{-} > F > O$

$F^{-} > O^{2 -} > F > O$

$O^{2 -} > O > F^{-} > F$

Atomic radius decreases on going from left to right in a period. Thus size of $O > F$ and size of anion is larger then their atoms. As $O^{2 -}$ and $F^{-}$ are isoelectronic, therefore, size of $O^{2 -} > F^{-} .$

Q. Arrange the given species F,F−,O and O−2 in the order of their radii

O2−>F−>O>F

O2−>F−>F>O

F−>O2−>F>O

O2−>O>F−>F