Question

Niobium crystallises in body-centred cubic structure. If density is 8.55 gcm⁻³, calculate atomic radius of niobium using its atomic mass 93 u.

Answer 1

It is given that the density of niobium, d = 8.55 gcm⁻³ 

Atomic mass, M = 93 gmol⁻¹ 

As the lattice is bcc type, the number of atoms per unit cell, z = 2