A cubic solid is made up of two elements P and Q. Atoms Q are present at the corners of the cube and atoms P at the body centre. What is the formula of the compound? What are the co-ordination number of P and Q?
No. of atoms of ‘P’ at each unit cell = 1 x 1 = 1 No. of atoms of ‘Q’ present in each unit cell = 8 (at cornere) x (\frac { 1 }{ 8}) Hence the formula of compound = PQ The co-ordination number of each atom ‘P’ and ‘Q’ is 8.
