Q. 124.5( 26 Votes )

A cubic solid is made of two elements P and Q. Atoms of Q are 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?

Answer :

Given. Atoms of Q are the corners of the cube and P at the body- centre


Therefore, Number of atoms of Q in one unit cell


Number of atoms of P in one unit cell =1


Therefore, Ratio of P and Q atoms = P:Q = 1:1


Therefore, formula of the given compound = PQ


Since it is bcc


Therefore, coordinate number of P and Q = 8


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