Question

The radius of $A{g}^{+}$ ion is $126$ pm and that of $I^{-}$ ion is $216$ pm. The coordination number of $A{g}^{+}$ ion is

• A. $2$
• B. $4$
• C. $6$
• D. $8$

Answer 1

Answer: (C)

$\frac{r_{+}}{r_{-}}=\frac{126}{216}=0.58$,
octahedral voids. Hence $C.N.=6$.