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# The edge of the face centred cubic unit cell of aluminium is 404 pm. Calculate the radius of aluminium atom.

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## 1 Answer

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For face centred cubic lattice, r =$\large\frac{\sqrt 2 a}{4}$
$r=\large\frac{1.414\times 404}{4}$$=142.8$pm
Hence (B) is the correct answer.
answered May 30, 2014