A cubic solid is made up of two elements P and Q. Atoms of Q at the corners of the cube and P at the body centre. What is the formula of the compound? What are the coordination numbers of P and Q?
Number of P atoms per unit cell= 1( at the body centre) × 1= 1 Number of Q atoms per unit cell = 8(at the corners) × 1/8 = 1 Hence the formula is PQ and coordination number of each of P and Q= 8
