In a cubic type unit cell, atoms of A are at centre and corners of the cube. Atoms of B are at one half faces of the cube. What is the simplest formula of the compound?

Explanation

To determine the simplest formula of the compound based on the given arrangement of atoms in the cubic unit cell, we can follow these steps:

### Step 1: Identify the contribution of atom A
- Atoms of A are located at the corners and the center of the cube.
- Each corner atom contributes \( \frac{1}{8} \) of an atom to the unit cell, and there are 8 corners in a cube.
- Therefore, the total contribution from the corner atoms is:
\[
\text{Contribution from corners} = 8 \times \frac{1}{8} = 1 \text{ atom}
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