Question

Which one of the following ions has the highest value of ionic radius ?

• A. Li⁺
• B. F^–
• C. B³⁺
• D. O^2–

Answer 1

Answer: (D)

O^2–

Answer 2

Li^{+} = 1s^{2} \\ B^{+ 3} = 1s^{2} \end{matrix} \right\rbrack\begin{matrix} O^{- 2} = 1s^{2}2s^{2}2p^{6} \\ F^{-} = 1s^{2}2s^{2}2p^{6} \end{matrix}$$ Order of size O^–2 \> F^–