Lecture_18_Metallic_Bonds - easily excited, and emit light...

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L E C T U R E N O T E S LECTURE 18 Metallic Bonds GENERAL CHEMISTRY Fall 2008 Updated: 11/22/2011
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The Metallic Bond Model A. Metallic Bonding 1. The chemical bonding that results from the attraction between metal atoms and the surrounding sea of electrons B. Electron Delocalization in Metals 1. Vacant p and d orbitals in metal's outer energy levels overlap, and allow outer electrons to move freely throughout the metal 2. Valence electrons do not belong to any one atom Metallic Properties A. Metals are good conductors of heat and light B. Metals are shiny 1. Narrow range of energy differences between orbitals allows electrons to be
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Unformatted text preview: easily excited, and emit light upon returning to a lower energy level C. Metals are Malleable 1. Can be hammered into thin sheets D. Metals are ductile 1. Ability to be drawn into wire a. Metallic bonding is the same in all directions, so metals tend not to be brittle E. Metals atoms organized in compact, orderly crystalline patterns F. Different metallic elements (and carbon) can be mixed to form alloys 1. Sterling silver a. Ag = 92.5%, Cu = 7.5% 2. Brass a. Cu = 60%, Zn = 40% Updated: 11/22/2011...
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This note was uploaded on 11/22/2011 for the course CHEMISTRY CHM1025 taught by Professor Laurachoudry during the Fall '10 term at Broward College.

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Lecture_18_Metallic_Bonds - easily excited, and emit light...

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