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crystal solids problems

crystal solids problems - 4 Gold has a face centered cubic...

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Lecture 25 problems Chem 11500 Fall 2008 1. How many atoms total are in each type of crystal structure? A. Simple cubic, B. Body centered cubic, C. Face centered cubic. 2. A unit cell of a particular solid has tungsten atoms at the corners, oxygen atoms in each cube edge, and a sodium atom in the center. What is the empirical formula of the compound? 3. The unit cell of Perovskite has calcium atoms at the corners, an oxygen atom in each face, and a titanium atom in the center. What is the empirical formula?
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Unformatted text preview: 4. Gold has a face centered cubic unit cell. If the edge of the unit cell is 0.408 nm, what is the radius of a gold atom? 5. One crystalline form of iron has a density of 7.93 g/cm 3 and a unit cell edge length of 0.286 nm. How many iron atoms are in the unit cell? 6. RbCl has chloride ions in a face centered cubic array and rubidium ions on every cell edge. The ratio of Rb + to Cl-is 0.84. If the density of RbCl is 2.76 g/cm 3 , what is the radius of a Rb + ion?...
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