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The edge length of face centred cubic un...

The edge length of face centred cubic unit cell is `5.8` pm. if the radius of the caiton is `110` pm. The radius of the anion is

A

144 pm

B

288 pm

C

618 pm

D

398 pm

Text Solution

Verified by Experts

The correct Answer is:
d
For face -centred cubic unit cell (e.g that of NaCl) edge length = ` 2 xx ` Distance between cation and anion = 2 `( r_(c) + r_(a)) ` = 508 pm ( given) , Putting ` r_(c) =110 pm , we get `r_(a) = 144 pm .
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