StudentLecture_26 - CHM 11500 T/1/2009 Lab Ch11 Gold Nanoparticles Reading Sections 13.1 13.2 13.4 and Lab manual Chapter 10 Models of the Solid

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CHM 11500 T, Lecture 26, 12/1/2009 Lab: Ch11, Gold Nanoparticles Reading: Sections 13.1, 13.2, 13.4 and Lab manual, Chapter 10, Models of the Solid State. Answer sheet on Blackboard in the lecture folder. URL for images: http://www.chem.purdue.edu/Courses/StructureLabs/ click on Crystal Explorer HW due Friday as usual Final Exam: 8 am, Tuesday, December 15. Hall of Music
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Crystalline solids When most liquids are cooled, they eventually freeze and form Crystalline solids solids in which the atoms , ions, or molecules are arranged in a definite repeating pattern. Some solids (such as diamonds and the individual grains in sugar and table salt) are single crystals, but most common crystalline solids are aggregates of many small crystals. Common examples of the latter are sandstone, chunks of ice, granite, and metal objects.
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Major Types of Crystalline Solids Interparticle Forces Physical Behavior Atomic (Noble gases) Soft, very low mp, poor thermal & electrical conductors Dispersion Molecular Dispersion, dipole- dipole, H bonds Fairly soft, low to moderate mp, poor thermal & electrical conductors Network Covalent bond Very hard, very high mp, usually poor thermal and electrical conductors Metallic Metallic bond Soft to hard, low to very high mp, excellent thermal and electrical conductors, malleable and ductile Ionic Ion-ion attraction Hard & brittle, high mp, good thermal & electrical conductors when molten Type
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This note was uploaded on 02/21/2010 for the course CHEM 115 taught by Professor L during the Spring '02 term at Purdue University-West Lafayette.

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StudentLecture_26 - CHM 11500 T/1/2009 Lab Ch11 Gold Nanoparticles Reading Sections 13.1 13.2 13.4 and Lab manual Chapter 10 Models of the Solid

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