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The edge length of a face-centred cubic ...

The edge length of a face-centred cubic unit cell is `508 p m`. If the radius of the cation is `110 p m` the radius of the anion is

A

288 pm

B

398 pm

C

618 pm

D

144 pm

Text Solution

Verified by Experts

For fcc arrangement `2 (r^(+) + r^(-))` =edge length 2 `(110 + r^(-))` = 50 g
so, `r^(-) = 144 `pm
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