Two ions `A^(o+)` and `B^(Θ)` have radii `88` and `200` pm, respectively. In the close-packed crystal of compound `AB`, predict coodination number of `A^(o+)`.

Options

A. 3
B. 4
C. 6
D. 8

Answer

C

Explanation

`(r_(A^(+)))/(r_(B^(-)))=(88)/(200)=0.44`
Which is the range of `0.414 and 0.732`.
Hence, the co-ordination of numberof `A^(+)` is 6.