EX Chapter 3.ppt

# EX Chapter 3.ppt

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1 Chapter 3 : The structure of Crystalline Solids EX1: If the atomic radius of lead (Pb) is 0.175 nm, calculate the volume of its unit cell in cubic meters. Pb crystallizes in face-centered cubic structure (FCC structure). EX2: Calculate the radius of a tantalum atom, given that Ta has a BCC crystal structure, a density of 16.6 g/cm 3 , and an atomic weight of 180.9 g/mol. EX3: Rhodium has an atomic radius of 0.1345 nm and a density of 12.41 g/cm 3 . Determine whether it has an FCC or BCC crystal structure. Rh = 102.905 g. mol -1 .

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2 EX4: Show that the atomic packing factor for BCC is 0.68. EX5: Calculate the radius of a palladium atom, given that Pd has an FCC crystal structure, a density of 12.0 g/cm3, and an atomic weight of 106.4 g/mol EX6: A metal has a simple cubic crystal structure. If its atomic weight is 74.5 g/mol and the atomic radius is 0.145 nm, compute its density.

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• Winter '15
• Crystallography, Crystal, Cubic crystal system, Crystal system, Atomic packing factor

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