Lecture_20_Metallic_Bonds

Lecture_20_Metallic_Bonds - LECTURE NOTES LECTURE 20...

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L E C T U R E N O T E S LECTURE 20 Metallic Bonds (p. 459) GENERAL CHEMISTRY Fall 2009 Updated: 11/22/2011
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A. Key vocabulary Electron sea model Delocalized electrons Metallic bond Alloy Malleable Ductile B. Properties of Metals Many of the properties of metals can be explained by means of metallic bonds and delocalized electrons. 1. Metals atoms organized in compact, orderly crystalline patterns 2. Metals are shiny a. Narrow range of energy differences between orbitals allows electrons to be easily excited, and emit light upon returning to a lower energy level 3. High boiling points a. Metals generally have extremely high boiling points because it is difficult to pull metal atoms completely away from the group of cations and attracting electrons. 4. Low melting points a. The melting points are considerably lower because of the mobility of the cations and electrons, which can move past each other. 5.
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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_20_Metallic_Bonds - LECTURE NOTES LECTURE 20...

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