Chemistry - Solid State Question with Solution | TestHub

In a face-centered cubic (fcc) unit cell, atoms are present at the $8$ corners and at the center of all the $6$ faces of the cube.

Contribution of atoms at the corners $=8\times \frac{1}{8}=1$

Contribution of atoms at the face centers $=6\times \frac{1}{2}=3$

Total number of atoms in an fcc unit cell $=1+3=4$

Answer: 4