Question

A cubic solid is made of two elements X and Y. Atoms Y are at the corners of the cube and X at the body centre. What is the formula of the compound ?​

Answer 1

Answer:

Atoms Y are at the corners of the cube and X at the body centre. What is the formula of the compound? Given, Y atoms are present at the corners and X atoms at the body centre.Therefore, the compound has a BCC structure. Hence, the formula of the compound is XY.

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Answer 2

Answer:

Atoms of Y occupy the corners of the cube.

=> Number of Y atoms in a unit cell = 8 x 1/8 = 1

The atom of X occupies the body centre.

=> Number of Y atoms in a unit cell = 1

Therefore, the ratio of the number of X atoms to the number of Y atoms;

X : Y = 1 : 1