Search results
Explore our table of common electron geometries with bonding domains, bond angles, and formulas. Lone pairs repel other electron domains more than bonds do (~2.5° per lone pair). For example: H-C-H angle ~ 109.5°. H-N-H angle ~ 107°. H-O-H angle ~ 104.5°. A molecule will be non-polar if all dipoles cancel out, otherwise, it will be polar.
Molecular Geometry Chart # of Electron Groups Number of Lone Pairs Electron Pair Arrangement Molecular Geometry Approximate Bond Angles 2 0 linear 180° 0 trigonal planar 120° 1 3 bent <20° 0 tetrahedral 109.5° 1 trigonal pyramid 4 <109.5° (~107°) 2 bent <109.5°(~105°) 0 trigonal bipyramidal 9 0°,12 1 see-saw <9 0°,<12
Using a Molecular Shape Chart helps to identify the connection between the number of places where valence electrons are situated and to understand the electron geometry around an atom. A VSEPR Shape Chart consists of columns and rows.
Download Cheat Sheet - Molecular Geometry Chart | Florida Memorial University | Complete table with info on lone pair, electron pair arrangement and molecular geometry.
Using the number of electron groups, determine the bond angle. Consider again the number of lone pairs on the central atom – these are not considered in the shape. Use the base geometry and include the number of lone pairs to determine the shape of the molecule.
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 ...
Given the atomic number of an element, you can deduce its electron configuration. Electrons are held in clouds of negative charge called orbitals. An atomic orbital is a region around the nucleus that can hold up to two electrons with opposite spins. There are different types of orbital: s, p, d, and f. Each one has a different shape:
