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Force Laws, Lewis Structures and Resonance Video Tutorial

Force Laws, Lewis Structures and Resonance: Professor McBride begins by following Newton’s admonition to search for the force law that describes chemical bonding. Neither direct (Hooke’s Law) nor inverse (Coulomb, Gravity) dependence on distance will do – a composite like the Morse potential is needed. G. N. Lewis devised a “cubic-octet” theory based on the newly discovered electron, and developed it into a shared pair model to explain bonding. After discussing Lewis-dot notation and formal charge, Professor McBride shows that in some “single-minimum” cases the Lewis formalism is inadequate and salvaging it required introducing the confusing concept of “resonance.”


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