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

## 1 Answer

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