The percentage of completely unoccupied (empty) space in a perfect Cubic Close-Packed (CCP) structural arrangement is: | Solid State — Chem-Mantra | Chem-Mantra

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Question

The percentage of completely unoccupied (empty) space in a perfect Cubic Close-Packed (CCP) structural arrangement is:

Answer: A

💡 Solution & Explanation

CCP is equivalent to FCC close packing, whose packing efficiency is $74\%$. Therefore the empty or unoccupied space is $100\%-74\%=26\%$.

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