A cub ic solid is made up of two elements A and B. Atoms B are at the corners of the cube and A at the body centre. What is the formula of compound.

Explanation

To determine the formula of the compound formed by the elements A and B in the given cubic solid structure, we will follow these steps:

### Step 1: Identify the positions of the atoms
- We know that atoms of element B are located at the corners of the cube, and atoms of element A are located at the body center of the cube.

### Step 2: Count the number of atoms at the corners
- A cube has 8 corners. Each corner atom contributes \( \frac{1}{8} \) of an atom to the unit cell because each corner atom is shared among 8 adjacent cubes.
- Therefore, the total contribution of the corner atoms (B) is:
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