Question

The volume of atom present in a face-centred cubic unit cell of a metal (`r` is atomic radius ) is
A. `(20)/(3)pir^(3)`
B. `(24)/(3)pir^(3)`
C. `(12)/(3)pir^(3)`
D. `(16)/(3)pir^(3)`

Answer 1

Correct Answer - 4
`v=(4)/(3)pir^(3)` In fcc `v=4xx(4)/(3)pir^(3)=(16)/(3)pi r^(3)`