In a hypothetical cubic unit cell, identical atoms are present at all corners and precisely at all e — Solid State Chemistry Question

💡 Solution & Explanation

Contribution from corners = $8 \times (1/8) = 1$. A cube has 12 edges, and each edge is shared by 4 unit cells. Contribution from edge centers = $12 \times (1/4) = 3$. Total effective atoms ($Z$) = $1 + 3 = 4$.