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University of South Carolina: Resonance in Lewis Structures
A slide show with several slides dedicated to the topic of resonance in Lewis structures. Diagrams help illustate the examples. A practice example is provided.
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Chemical Bonds: Writing Lewis Structures
This slide show explains the rules for writing Lewis structures and then demonstrates an example. It then provides a practice example for the student to try.
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Organic Chemistry: Lewis/kekule Structures
This slide presentation contains a few slides that will be useful for students learning to write Lewis structures. A discussion of multiple bonds is included, and clear examples are shown.
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Chemical Bonds: Formal Charges
A slide presentation with several slides dedicated to the topic of formal charges. Formal charges are explained, and examples are given. A practice example is provided.