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A compound of two elements P and Q cryst...

A compound of two elements P and Q crystallises in cubic structure. If P occupies corners and Q occupies face centres, what is the composition of the compound ? If atoms of Q along one direction are removed, what is the composition ? 

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To solve the problem step by step, we will analyze the arrangement of the elements P and Q in the cubic structure and then calculate the composition before and after the removal of Q atoms. ### Step 1: Determine the number of P atoms in the unit cell - In a cubic structure, the corners of the cube are occupied by P atoms. - There are 8 corners in a cube. - Each corner atom contributes \( \frac{1}{8} \) of an atom to the unit cell. **Calculation:** ...
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