What is the number of atoms in a unit cell of a face-centred cubic crystal ?

Explanation

To determine the number of atoms in a unit cell of a face-centered cubic (FCC) crystal, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the positions of the atoms in the FCC unit cell**:
- In a face-centered cubic unit cell, atoms are located at each of the eight corners of the cube and at the centers of each of the six faces.

2. **Calculate the contribution of corner atoms**:
...