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

Explanation

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

### Step 1: Understanding the Body-Centered Cubic (BCC) Structure
In a BCC unit cell:
- There is **1 atom at the center** of the cube.
- There are **8 atoms at the corners** of the cube.

### Step 2: Calculating the Contribution of Corner Atoms in BCC
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