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Metallic beryllium has a hexagonal close-packed structure and a density of 1.85 g/cm3. Assume beryllium atoms...

Metallic beryllium has a hexagonal close-packed structure and a density of 1.85 g/cm3. Assume beryllium atoms to be spheres of radius r. Because beryllium has a close-packed structure, 74.1% of the space is occupied by atoms. Calculate the volume of each atom, then find the atomic radius, r. The volume of a sphere is equal to 4πr3/3.

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Answer #1

N a3 2 3 3 a = 4.85x10 cm 2 一23 3 3

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