Question

A closed packed structure of uniform spheres has the unit cell edge length equal to $0.8$ mm.The radius (in mm) of molecule if it has simple cubic lattice will be:

• A. $0.2$
• B. $0.4$
• C. $0.6$
• D. $0.8$

Answer 1

The correct option is B $0.4$

As we know, for simple cubic lattice structure,
$2r=a$
$r=\frac{a}{2}=\frac{0.8}{2}=0.4$ mm