How many total numbers of atoms are present per unit cell in BCC unit cell?

2

Body-Centred Cubic Unit Cell: A body-centred cubic (bcc) unit cell has an atom at each of its corners and also one atom at its body centre.

Thus, in a body-centered cubic (bcc) unit cell:

(i) 8 corners × \(\frac{1}{8}\) per corner atom 8 × \(\frac{1}{8}\) = 1 atom

(ii) 1 body centre atom = 1 × 1 = 1 atom

∴ Total number of atoms per unit cell = 2 atoms