In a face-centered cubic (FCC) unit cell, what is the exact contribution of atoms present strictly a — Solid State Chemistry Question
Question
In a face-centered cubic (FCC) unit cell, what is the exact contribution of atoms present strictly at the face centers to a single unit cell?
Answer: C
💡 Solution & Explanation
A cubic unit cell has 6 faces. An atom located at the face center is shared equally between 2 adjacent unit cells. Therefore, its contribution is $1/2$. For 6 faces, the total contribution = $6 \times 1/2 = 3$ atoms.
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