Question

What is the number of atoms in the unit cell of body centred cubic crystal?

• A. $1$
• B. $3$
• C. $4$
• D. $2$

Answer 1

The correct option is D $2$

For body centred cubic crystal, atoms present at body centre and corners of the unit cell.
$\therefore$ Number of atoms per unit cell $=8\times \frac{1}{8}+1=2$.