Question

The unit cell of a metallic element of atomic mass 108 and density 10.5 g cm-3 is a cube with edge length of 409 pm. The structure of the crystal lattice is

(1) fcc.

(2) bcc.

(3) hcp.

(4) none of these.

Answer 1

The density is given by

Substituting the values, we get Number of atoms per unit cell. (z) = 4

So, the structure of the crystal lattice is fcc.

Hence, the correct option is (1).