. A compound formed by elements X and Y crystallizes
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: X3Y
B: XY
C: XY2
D: XY3
Best Answer
Explanation:
As per the question, the X atoms are at the corners of a cube and the y atoms are at the face - centres.
On one corner of a cube, only one atom can accommodate so the number of x atoms per unit cell will be
8/8=1
On one face of a cube, two atoms can accommodate so the number of y atoms per unit cell will be
6/2=3
So, the compound formula is .xy3
Final answer:
Hence, the correct option is D, i.e. .xy3
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