QJEEM10Ch6d48: JEE Main 2010 Chemistry - Class 12 JEEM10Ch6d48 Solution: The edge length of a face centered cubic cell of an ionic…

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The edge length of a face centered cubic cell of an ionic substance is 508 pm. If the radius of the cation is 110 pm, the radius of the anion is :

Accepted Answer

For an Fcc crystal

{r_{cation}} + {r_{anion}} = {{edge\,\,length} \over 2};

\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,110 + {r_{anion}}\,\, = {{508} \over 2}

{r_{anion}} = 254 - 110 = 144pm

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