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Three atoms P, Q and R crystallize in a cubic solid lattice where P atoms are at the alternate faces, R atoms are at the centre of edges and Q atoms are at the rd of the total corners present, hence the formula of the compound is |
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Answer» Explanation: P atoms are at corners. There are 8 corners and contribution of each corner is 8 1 . Therefore, total P ATOM is 8× 8 1 =1. Q is at the centre of the cube. Therefore, total Q atom is 1. R are present at the EDGES. There are 12 edges and contribution of each EDGE is 4 1 . Total R atoms are 4 1 ×12=3. Formula is PQR 3 |
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