Q.1. What is the formula of a compound in which the element Y form ccp lattice and atom of X occupy 1/3rd of tetrahedral voids?
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Answer:
Number of tetrahedral voids formed =2× number of elements Y
Number of atoms of element Y in the ccp unit cell =4
Number of tetrahedral voids formed =2×4=8
Number of tetrahedral voids occupied by atoms of X =
3
1
×8
Ratio of the number of atoms of X and Y =
3
8
:4=2:3
Hence, the formula of compound is X
2
Y
3
Answer:
X2Y3 is the formula of a compound in which the element Y forms ccp lattice and atoms of X occupy 1/3rd of tetrahedral voids.