09-06-06 (3) Bonding Outline

09-06-06 (3) Bonding Outline - Chemical Bonds September 6...

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Chemical Bonds September 6, 2006
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Lecture Outline Background: Elements & Atoms Chemical Bond Overview Covalent Bonds Ionic Bonds Hydrogen Bonds Van der Waals Interactions Chemical Reactions
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Background Matter : Element :
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Essential Elements
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Essential Elements 25 known to be essential to life 4 essential elements make up 96% of living matter Trace Elements
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Elements An element’s properties depend on the structure of its atoms Each element consists of a certain kind of atom that is different from those of other elements Atom
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Atom Composed of subatomic particles Protons Neutrons Electrons
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Atom
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Atom Models
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Atoms Atoms of the various elements differ in their number of subatomic particles Atomic Number Mass Number
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Periodic Table of the Elements
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Isotopes Atoms of a given element may occur in different forms Atomic # vs. Mass #
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Isotopes - examples
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Electrons Energy levels Energy shells
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Electrons The configuration of the electrons determines the behavior of an atom Periodic table
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Electrons - examples
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Valence Electrons Most important in determining behavior of an atom Valence shell
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