1. Explain why an end-centered unit cell cannot be cubic. What is the highest possible symmetry for this type of unit cell? 2. Explain why uncharged atoms or molecules never crystallize in simple structures. 3. Explain why a hexagonal closest-packed structure and a cubic closest-packed structure for a given element would be expected to have same density.

1. Explain why an end-centered unit cell cannot be cubic. What is the highest possible symmetry for this type of unit cell? 2. Explain why uncharged atoms or molecules never crystallize in simple structures. 3. Explain why a hexagonal closest-packed structure and a cubic closest-packed structure for a given element would be expected to have same density.

Physical Chemistry

2nd Edition

ISBN:9781133958437

Author:Ball, David W. (david Warren), BAER, Tomas

Publisher:Ball, David W. (david Warren), BAER, Tomas

Chapter21: The Solid State: Crystals

Section: Chapter Questions

Problem 21.30E

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