Student%20Notes%20CHM115-F09-Lecture%2027%28revised%29

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Unformatted text preview: 1 1 CHM 115 Lecture 27 Todays Lecture Reading was KTT: The Chemistry of Modern Materials pp. 656-669 Solids Review of Lecture 26 Properties and Characteristics of some Crystalline Materials: Ceramics Next Lecture Review same Inter-chapter 2 3 Next Week in Chemistry Lab: Check out GO , the failure to check out fee is $45 Homework #14 due Friday 12/11 at 6:00 PM Final, Tuesday 12/15, 8:00 AM Hall of Music 2 hours, 40 multiple choice questions Same drill for equipment and seats ! CoursEval 3.0: Please complete by 12/13 4 4 Study Session If you think I can be of help in preparing for the final exam: Study/Help Session Sunday, 13 December 1:00 to 3:00 PM Room 1105, Lilly Life Sciences Building 5 Unit Cell Summary Net # Net # edge = edge = Unit Cell Type Unit Cell Type Atoms Atoms f(radius) f(radius) SC SC 1 1 a = 2r a = 2r BCC BCC 2 2 a = 4r a = 4r / / ( ( 3) 3) FCC FCC 4 4 a = ( a = ( 8) 8) r r 6 The structures of simple ionic compounds In simple ionic structures space is filled as compactly as possible ions of one charge are surrounded by as many ions as possible of the opposite charge positive and negative ions touch Ionic structures are determined by two principal factors the relative sizes of the ions the ratio of the numbers of positive and negative ions in the compound 7 NaCl Construction NaCl Construction FCC lattice of Cl- with Na + in holes Na Na + in in octahedral octahedral holes holes 8...
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This note was uploaded on 03/20/2011 for the course CHEM 115 taught by Professor L during the Fall '02 term at Purdue University-West Lafayette.

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