A solid between `A` and `B` has the following arrangement of atoms `:`
`(i)` Atoms `A` are arranged in `c.c.p.` array.
`(ii)` Atoms `B` occupy all the all the octahedral voids and half the tetrahedral voids. What is the formula of the compound ?

Explanation

To determine the formula of the compound formed by atoms A and B based on the given arrangement, we can follow these steps:

### Step 1: Understand the arrangement of atoms A
Atoms A are arranged in a cubic close-packed (CCP) structure. In a CCP structure, there are atoms located at the corners and the face centers of the cube.

### Step 2: Calculate the number of atoms A in the unit cell
In a CCP unit cell:
- Each corner atom contributes \( \frac{1}{8} \) of an atom to the unit cell, and there are 8 corners.
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