CHEM+1311+Quiz+4 - CHEM1311 Dr.CharlieCox Summer2009 1....

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CHEM 1311 Quiz #4, 20 points 11 June 2009 Dr. Charlie Cox Name_______________________________ Summer 2009 Closed NOTE/Closed BOOK 1. Calculate the number of atoms per cell given the rock salt crystal packing. Show all work. [7 points] What is the coordination number for Na + ? ____________________________ [1 point] 2. Calculate the density of Li if it crystallizes in a bcc crystal structure. The radius of a single lithium atom is 145 pm. [7 points] 3. Label each of the following as conductor, semiconductor, or insulator. [3 points] ___________________ ____________________ ____________________ Identify the valence band and conduction band for the indicated band diagram. [2 points]
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The Periodic Table of the Elements 1 H Hydrogen 1.00794 2 He Helium 4.003 3 Li Lithium 6.941 4 Be Beryllium 9.012182 5 B Boron 10.811 6 C Carbon 12.0107 7 N Nitrogen 14.00674 8 O Oxygen 15.9994 9 F Fluorine 18.9984032 10 Ne Neon 20.1797 11 Na Sodium 22.989770 12 Mg Magnesium 24.3050 13 Al Aluminum 26.981538 14
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CHEM+1311+Quiz+4 - CHEM1311 Dr.CharlieCox Summer2009 1....

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