How many atoms can be assigned to its unit cell if an element forms (i) a body centred cubic unit cell (ii) face centred cubic unit cell ?

Explanation

To determine the number of atoms assigned to the unit cell for both body-centered cubic (BCC) and face-centered cubic (FCC) unit cells, we can follow these steps:

### Step 1: Understanding the Body-Centered Cubic (BCC) Unit Cell
1. **Identify the positions of atoms**: In a BCC unit cell, there are atoms located at:
- 8 corners of the cube
- 1 atom at the center of the cube

2. **Calculate the contribution of corner atoms**: Each corner atom is shared by 8 adjacent unit cells. Therefore, the contribution of each corner atom to the unit cell is:
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