Question

The radii of the F, $F^{-}$, O and $O^{2-}$ are in the order

• A. $O^{2-}>O>F^{-}>F$
• B. $F^{-}>O^{2-}>F>O$
• C. $O^{2-}>F^{-}>F>O$
• D. $O^{2-}>F^{-}>O>F.$

Answer 1

Answer: (D)

Radii are in the following order
$O^{2-}>F^{-}>O>F\to$
$O^{2-}$ and $F^{-}$ are isoelectronic and 0, F belong to the same period.