Laboratory manual for inorganic chemistry / Che Faridah Osman, Cindy Tan Soo Yun and Gan Gin Hoon

Valence Shell Electron Pair Repulsion (VSEPR) theory allows one to predict the electronic and molecular geometries of a molecule from its Lewis structure. These predictions are primarily based on the number of regions of electron density (REDs or VSEPs) around the central atom(s). In order to get correct answers from VSEPR theory, you must first have a correct Lewis structure. Therefore, the procedures for drawing Lewis structures from the textbook and lectures must be mastered. Remember that you must account for all valence electrons and you must show all of these electrons in the Lewis structure.