Q. 8

Aluminium crystal

Answer :


For a face-centred cubic lattice structure of crystal


r = where, r = radius of the sphere (components of the crystal- like an atom) s= edge length of the unit cell.


Hence , a =r X 22 = 2 X 125 X 1.414 (2 = 1.414 )


=353.5 pm.


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