Statement I: When an element crystallizes in either CCP or HCP arrangement, the density of solid remains the same in both the arrangements. Statement II: Both CCP and HCP arrangements have the same pa

Question

Statement I: When an element crystallizes in either CCP or HCP arrangement, the density of solid remains the same in both the arrangements. Statement II: Both CCP and HCP arrangements have the same packing fractions.

Prashant Kotian · Accepted Answer

Correct answer: A. Statement I is correct: for a given element with a fixed atomic radius, the density in CCP and HCP is the same. Statement II is also correct: both have a packing fraction of 74%, which is the direct explanation of Statement I.

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