Mastering VSEPR Theory

• VSEPR theory explains the shape of polyatomic molecules based on valence shell electron pairs.
• The central atom and the number of electron pairs determine the shape of the molecule.
• Electron pairs repel each other and tend to orient themselves to minimize repulsion and maximize distance.
• Lone pairs and bond pairs can affect the shape of the molecule.
• VSEPR theory can be applied to resonance structures.
• The theory has limitations in explaining isoelectronic species, compounds of transition metals, and the structure of halides of group 2 elements.
• The least electronegative atom is selected as the central atom.
• The total number of electrons in the outermost shell of the central atom and in bonds with other atoms is used to determine the VSEP number.
• The strength of repulsion is strongest in two lone pairs and weakest in two bond pairs.
• The distance between electron pairs affects the energy of the molecule.

Test your knowledge of VSEPR theory with this quiz! Learn about the factors that determine the shape of polyatomic molecules, including the number of electron pairs and the orientation of lone pairs and bond pairs. Discover the limitations of the theory and its applications to resonance structures. See how well you understand the concept of VSEP number and the strength of electron pair repulsion. Take this quiz to improve your understanding of molecular geometry and the forces that govern it.