Question

A compound formed by elements X and Y crystallizes in a cubic structure in which the X atoms are at the corners of a cube and the Y atoms are at the face centres. The formula of the compound is 

(a) XY₃ 

(b) X₃Y 

(c) XY 

(d) XY₂

Answer 1

Correct option: (a) XY₃

Explanation:

For a cubic structure,

No. of X atoms = 8 x 1/8 = 1

No. of Y atoms = 6 x 1/2 = 3

∴ Formula of the compound = XY₃