In a face-centered cubic (FCC) unit cell, what is the exact contribution of atoms present strictly a — Solid State Chemistry Question

💡 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.