Question

The total number of atoms in a face-centred cubic unit cell is equal to three.

• A. True
• B. False

Answer 1

The correct option is B False

The total number of atoms in a face centered cubic unit cell is 4.
There are 8 atoms on the corners = $\frac{1}{8}\times 8=1$
There are 6 atoms on the face centers = $6\times \frac{1}{2}=3$
So the total number of atoms = $1+3=4$