The volume of atom present in a face-centred cubic unit cell of a metal (`r` is atomic radius ) is

Options

A. `(16)/(3)pir^(3)`
B. `(20)/(3)pir^(3)`
C. `(24)/(3)pi^(3)`
D. `(12)/(3)pir^(3)`

Explanation

In fcc, no of atoms=4
volume occupied atoms `=4[(4)/(3)pir^(3)]=(16)/(3)pir^(3)`