Question

Particle at the face centre of the unit cell contributes how many part to that unit cell?

• A. $\frac{1}{2}$
• B. $\frac{1}{3}$
• C. $\frac{1}{4}$
• D. $\frac{1}{8}$

Answer 1

The correct option is A $\frac{1}{2}$

Contribution of face-centred particle:
A particle at the face-centre is shared by two-unit cells.
So, each particle contributes $\frac{1}{2}$ part to the unit cell.