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Size of Atoms and Ions

The ionic rad...

Question

The ionic radii of $R b^{+}$ and $I^{-}$ are $1.46$ and $2.16 ˚ A$ respectively. The most probable type of structure exhibited by it is

C s C l

type

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N a C l

type

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Z n S

type

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C a F_{2}

type

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Solution

The correct option is D $N a C l$ type
$\frac{r^{+}}{r^{-}} = \frac{1.46}{2.16} = 0.675$
Value is between $0.414 - 0.732$ .
Hence, the structure is NaCl type.

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the ionic radii of X+ and Y - ions are 146 and 216 picometre respectively the probable type of structures shown by it is

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