WARM UP “He who limps is still walking.” – Stanislav Lec

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Presentation transcript:

WARM UP “He who limps is still walking.” – Stanislav Lec How can you apply this to life in the real world? How can you apply this to your work in Chemistry?

Resonance Structures Chemistry II

Resonance Structures Multiple possible Lewis structures None are perfect, have charges on atoms Molecule is a mixture of the structures

Resonance Structures Formal charge Atoms in a molecule have a full charge because they have too many or too few bonds/e- Polyatomic ions have overall charge

Resonance Structures Calculating for each atom Valence e- - e- after bonding (bonds = 1 e-) Difference = charge Counting bonds C likes 4, N likes 3, O likes 2 More bonds, + charge Less bonds, - charge

WRAP UP Draw resonance structures for CO32-, showing formal charges. Draw resonance structures for O3, showing formal charges.