Question

A particle at edge centre of a unit cell contributes how much 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 C $\frac{1}{4}$

Contribution of Edge-Centred Particles:
A particle present at the edge-centre is shared by four-unit cells.


Contributes $\frac{1}{4}$ part to the unit cell as shown :