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electron-pair geometry vs molecular geometry

Posted: Thu Nov 21, 2019 2:13 pm
by bellaha4F
What is the difference between electron-pair geometry and molecular geometry? Should we know both or should we just know the molecular geometry?

Re: electron-pair geometry vs molecular geometry

Posted: Thu Nov 21, 2019 2:32 pm
by Jacey Yang 1F
The electron pair geometry is based on the number of regions of electron density around the atom (parent shape), while molecular geometry is the actual shape that includes bonding pairs and lone pairs.

Re: electron-pair geometry vs molecular geometry

Posted: Thu Nov 21, 2019 3:00 pm
by Megan Ngai- 3B
Electron pair geometry: number of regions of electron density
Molecular geometry: includes bonding pairs and lone pairs.

Re: electron-pair geometry vs molecular geometry

Posted: Thu Nov 21, 2019 3:57 pm
by Katie Kyan 2K
Electron pair geometry refers to the arrangement of electron groups and takes into account the lone pairs in a molecule. However, molecular geometry takes into account the number of bonds AND the lone pairs. For example for NH3, the electron geometry is tetrahedral whereas the molecular geometry is trigonal pyramidal.