The Total solution for NCERT class 6-12
A cubic solid is made oftwo elements P and Q. Atoms of Q are at the corners of the cube and P at thebody-centre. What is the formula of the compound? What are the coordinationnumbers of P and Q?
It is given thatthe┬аatoms of Q are present at the corners of the cube.
It is also given thatthe┬аatoms of P are present at the body-centre.
Therefore, number ofatoms of P in one unit cell = 1
This means that┬аtheratio of the number of P atoms to the number of Q atoms, P:Q = 1:1
Hence, the formula ofthe compound is PQ.
The coordination numberof both P and Q is 8.