Question

The number of atoms per unit cell of bcc structure is :

• A. 1
• B. 2
• C. 4
• D. 6

Answer 1

The correct option is B 2

In bcc structure,
The number of atoms at corners per unit cell $=\frac{1}{8}\times 8=1$ atom

The number of atoms at body centre per unit cell $=1$ atom

$\therefore$ Total number of atoms per unit cell $=1+1=2$ atoms