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Valence shell electron pair repulsion (VSEPR) rules are a model in chemistry used to predict the shape of individual molecules based upon the extent of electron-pair electrostatic repulsion. [ 1 ] It is also named Gillespie – Nyholm theory after its two main developers. The acronym "VSEPR" is sometimes pronounced "vesper" for ease of pronunciation; however, the phonetic pronunciation is technically more correct. [ 2 ]
The explosive decomposition of nitrogen triiodide shown in the video is an exciting (and forceful) example of chemistry in action.