Question

The radius of Ag+ ion is 126 pm and that of I– ion is 216 pm. The co-ordination number of Ag+ ion is.

• A. 2
• B. 4
• C. 6
• D. 8

Answer 1

Answer: (C)

6

Answer 2

$\frac{r_{+}}{r_{-}} = \frac{126}{216}$= 0.58, octahedral voids so

C.N. = 6.