(Polar molecules, Non-polar molecules, etc.)
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I know that Lavelle said that lone pair e- impact the shape of the molecule, but is the impact of a greater or lesser magnitude than if an atom were in the place of the lone pair? I hope this isn't too confusing.
Having a lone pair has a greater effect on repulsion because if you think about it, only one atom will be fighting for electrons, where as if there was a bond, two atoms would be exhibiting a nuclear force on the electrons. This means that the lone pair will be pulled closer to the nucleus, and the closer negative charges of the electrons will have greater magnitude of repulsion than if there were an atom in place.
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