Question

17. Silver crystallises in a face-centred cubic in cell. The density
of Ag is 10.5 g cm. Calculate the edge length of the unit cell.​

Answer 1

d = ZM/ V Na

V = Volume = a³

Z = No. of atoms

M = Atomic mass

Na = Avogadro Constant

V = ZM/ d Na

a³ = 4 × 108/ 10.5 × 6.02 × 10 ^ 23

a = 0.47 nm