: Steven S. Zumdahl
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Steven S. Zumdahl, Susan A. Zumdahl. This again illustrates the point that simple
models are bound to have exceptions. In introductory chemistry
we want to use
simple models that fit the majority of cases; we are willing to accept a few failures
rather than complicate the model. The amazing thing about the VSEPR model is
that such a simple model predicts correctly the structures of so many molecules.
107° NH3 H H H N PH3 94° H H H P ...