CBSE Class 12-science Answered
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 center. What is the formula of the compound?
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
The atom at the body centre makes a contribution of 1 to the unit cell, while the atom at the corner makes a contribution of 1/8 to the unit cell.
Thus, number of atoms Y per unit cell
= Number of atoms × Contribution per unit cell
= 8 (at the corners) × 1/8 atoms per unit cell
= 1
Thus, number of atoms X per unit cell
= Number of atoms × contribution per unit cell
= 1 (at the body centre) × 1
= 1
Thus, the formula of the given compound is XY.
Answered by | 04 Jun, 2014, 03:23: PM
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