Question

If the ionic radii of $K^{+}$ and $F^{-}$ are nearly the same (i.e $1.34\mathring{A}$) then the atomic radii of $K$ and $F$ are respectively are

• A. $1.34\mathring{A},1.34\mathring{A}$
• B. $0.72\mathring{A},1.96\mathring{A}$
• C. $1.96\mathring{A},0.72\mathring{A}$
• D. $1.96\mathring{A},1.34\mathring{A}$

Answer 1

The correct option is C

$1.96\mathring{A},0.72\mathring{A}$

The size of $K$ will be higher than that of $K^{+}$ while size of $F$ will be lower than that of $F^{-}$