Question

9. A cubic solid is made of two elements P and Q, in which Q atoms occupy 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 1

Explanation:

ANSWER

Since P is present at corners of the cube,

So, number of P atoms =

8

1

×8=1.

Q is present at the body center. So, number of Q atom = 1.

So, the formula of the compound is PQ.

Here, P is surrounded by 8 Q atoms, and Q is surrounded by 8 P atoms.

So, the coordination number is 8:8.

Hence, option "D" is the correct answer.

Answer 2

A cubic solid is made of two elements P and Q, in which Q atoms occupy the corners of the

cube and P at the body