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Unformatted text preview: The non-directional nature of the metallic bond results in crystals with low coordination numbers. (1 point each) Label the following as characteristics of strong bonds ( S ) or weak bonds ( W ). low melting point short bond length large thermal expansion coefficient large elastic modulus (3 points) What are the coordination numbers (number of nearest neighbors) for FCC, HCP, and body centered cubic (BCC) crystal structures? FCC CN = HCP CN = BCC CN = (2 points) How many atoms are contained inside of the unit cell for FCC and BCC crystals? (3 points) Calculate the atomic radii for gold (FCC with a = 0.4078 nm). Use the correct number of significant figures for the correct answer. a) 0.1766 nm b) 0.1442 nm c) 0.177 nm d) 0.144 nm...
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- Spring '09