Question

The radius ratio of an ionic solid ($A^{+}{B}^{-}$) is 0.69. What is the coordination number of $B^{-}$?

• A. 6
• B. 8
• C. 2
• D. 10

Answer 1

Answer: (A)

6

The coordination number of octahedral geometry is 6. Whose radius ratio lies between 0.732 to 0.414.

Hence,option A is correct.