Atoms of element P form ccp lattice and those of the element Q occupy 1/3rd of tetrahedral voids and all octahedral voids. What is the formula of the compound formed by the elements P and Q?

Explanation

Let no. of Atoms of element P be x
No. of tetrahedral voids = 2x
No. Of octahedral voids = x
Atoms of `Q = 1//3 (2x) + x = 5x//3`
`P_(x)Q_(5x/3)`
`P_(3)Q_(5)`