Lecture 3 - Lewis structurs and bonding

Lecture 3 - Lewis structurs and bonding - Lecture3...

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Lecture 3 Lewis Structures and Bonding
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Tues 1.25.11  V. Patman 2 Lewis Structures Allow depiction of nuclei considering only outermost (valence) electrons. Drawing structures - A Rule i.e.: O2, NaCl Question: Are these electrons all shared equally? 
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Tues 1.25.11  V. Patman 3 Lewis Structures Types of Bonds Pure Covalent: Polar Covalent: Ionic: Question: What are trends in electronegativity? 
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Tues 1.25.11  V. Patman 4 Lewis Structures Molecules and Polyatomic ions – Steps Determine total # of valence electrons and account for any charges Determine arrangement of atoms (isomers are possible!) Connect atoms and satisfy octet/duet rule Bonding electrons vs lone pairs Single, double and triple bonds Assign formal charge. 
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Tues 1.25.11  V. Patman 5 Lewis Structures Practice: Draw Lewis structures and calculate formal charges for the  following polyatomic molecules -   CH4, H2CCH2, HCOO-,  BUT! There are generalities and exceptions. . . (see Table 1.8)
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Tues 1.25.11
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Lecture 3 - Lewis structurs and bonding - Lecture3...

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