What is the void space per unit cell for metallic silver crystallizing in the FCC system, the edge l — Solid State Chemistry Question
Question
What is the void space per unit cell for metallic silver crystallizing in the FCC system, the edge length of the unit cell being 4 Å?
Answer: D
💡 Solution & Explanation
In FCC, the packing fraction is 74% = 0.74, meaning that the void space fraction is 1 - 0.74 = 0.26 (or 26%). Volume of unit cell V = a³ = (4 Å)³ = 64 ų. Therefore, void space per unit cell = 0.26 × 64 ų = 16.64 ų.
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