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In a solid A ...

Question

In a solid A particles are present at the corners B particles are present at the face center along an axis. What is the formula of the compound

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Solution

A particles are present on all corners= 81/8 = 1 (Contribution of a atom at corner = 1/8)
B particles are pesent at face center along one axis = 2 1/2 = 1 ( Contribution of at atom at a face center = 1/2 )
So Formulae of compound is AB.

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