The valence-shell electron-pair repulsion (VSEPR) model allows us to predict which of the possible structures is actually observed in most cases. It is based on the assumption that pairs of electrons occupy space, and the lowest-energy structure is the one that minimizes electron pair–electron pair repulsions.

Use our handy VSEPR chart to find the 3-D geometric VSEPR shapes of molecules and ions and learn about VSEPR theory and shapes.

What is VSEPR theory. What is it used for. What does it predict. Learn the shapes of molecules based on AXE notation. Check out the VSEPR theory table.

Summary VSEPR Table Electron Domains Electron-Domain Geometry Predicted Bond Angle(s) Molecular Geometry 0 Lone Pair 1 Lone Pair 2 Lone Pair 2 Linear 180º Linear 3 Trigonal Planar 120º Trigonal Planar Bent 4 Tetrahedral 109.5º Tetrahedral Trigonal Pyramidal Bent 5 Trigonal Bipyramidal 90º, 120º Trigonal Bipyramidal Seesaw T-shaped ...

Table Summarizing Geometries Based on VSEPR. Hybrid Atomic Orbitals. Molecular Orbital Theory

This VSEPR chart shows you all of the common VSEPR geometries, organized by the steric number and how many lone electron pairs they have. The steric number is how many atoms are bonded to a central atom of a molecule plus the number of …

All bonds are represented in this table as a line whether the bond is single, double, or triple. Any atom bonded to the center atom counts as one domain, even if it is bonded by a double or triple bond. Count atoms and lone pairs to determine the number of domains, do not count bonds.

Regions of High Electron Density (Bonded & Lone Pair Regions) Molecular Structures and Examples. The Lone Pairs have been omitted from the peripheral atoms. Two : Linear AX2LP0AX1LP1.

Summary VSEPR and Hybridization Table Electron Domains Electron-Domain Geometry Predicted Bond Angle(s) Hybridization of Central Atom Molecular Geometry 0 Lone Pair 1 Lone Pair 2 Lone Pair 2 Linear 180º sp Linear 3 Trigonal Planar 120º sp2 Trigonal Planar Bent 4 Tetrahedral 109.5º ...

Valence shell electron-pair repulsion theory (VSEPR) What do molecules look like? What is their three-dimensional shape, and how might we predict it? VSEPR * is a model that is pretty good at predicting the general features, if not the details, of the structures of polyatomic molecules.