Question

AB is an ionic solid. If the ratio of ionic radius of A⁺ and B^- is 0.52, what is the coordination number of B^- ?

Options

• 2

• 3

• 6

• 8

Answer 1

6

Explanation:

Radius ratio (r+/r-)	Coordination number
0.155 - 0.225	3
0.225 - 0.414	4
0.414 - 0.732	6
0.732 - 1.00	8

Hence, If the ratio of ionic radius is 0.52, then coordination number of B^- is 6.