CH9(8)Nov17FA08a - CHEM 109 General Chemistry University of...

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CHEM 109 General Chemistry University of Nebraska Fall 2008
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Lewis Structures of Polyatomic Ions CN - NO 2 + CO 3 -2
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Resonance Structures Resonance structures : different Lewis dot structures for a compound with the same arrangement of ________ but a different arrangement of ___________. Resonance structures occur with compounds containing a ___________ bond next to a _________ bond. Resonance structures can be found with molecules or ions.
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O O O O O O O O 1.48 Å O = O 1.21 Å Resonance Structures ____________ electron pair O 3
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Typically, structures with multiple bonds can have similar structures with the multiple bonds “alternating” between different pairs of atoms. ( Resonance structures ) C S N C S N C S N NOTE: Not all resonance structures are necessarily ___________. Some possible structures may be better than others. ______________ are useful in determining which structures are favored. Resonance Structures
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Formal Charge Many times resonance forms are equally mixed to form the resonance hybrid when molecules are ______________ . (i.e. nitrate, carbonate, ozone) For ______________
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CH9(8)Nov17FA08a - CHEM 109 General Chemistry University of...

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