Question

Potassium fluoride has $NaCl$ type structure. What is the distance between $K^{+}$ and $F^{-}$ ions if cell edge is $acm$.

• A. $2acm$
• B. $a/2cm$
• C. $4acm$
• D. $a/4cm$

Answer 1

Answer: (B)

$a/2cm$

Answer 2

Distance between $K^{+}$ and $F^{-} = \frac{1}{2} \times$length of the edge.