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Molecular geometry vs Electron geometry

Posted: Sun Nov 18, 2018 3:48 pm
by Michael Nirula
Will we have to know both the molecular geometry and electron geometry?

Re: Molecular geometry vs Electron geometry

Posted: Sun Nov 18, 2018 3:51 pm
by timothy_ho_4B
Yes, as we covered both topics pretty in depth in lecture several times.

Re: Molecular geometry vs Electron geometry

Posted: Sun Nov 18, 2018 3:57 pm
by Michael Nirula
Ok great could someone explain how they are different?

Re: Molecular geometry vs Electron geometry

Posted: Sun Nov 18, 2018 5:33 pm
by Michelle Nwufo 2G
Do you guys know if on the test, when they ask for us to find shape of a molecule, should we assume they are referring to the geometry?

Re: Molecular geometry vs Electron geometry

Posted: Sun Nov 18, 2018 7:16 pm
by daniella_knight1I
I would say assume the geometry since that's what we've been discussing.

Re: Molecular geometry vs Electron geometry

Posted: Mon Nov 19, 2018 5:22 pm
by timothy_ho_4B
Yeah! The electron geometry is pretty much how many electron densities are around the central atom, regardless of whether the electron densities are from a bond or from a lone pair. So, for instance, ammonia (NH3) has an electron geometry of a tetrahedral because it has 3 bonds with the hydrogen atoms around the nitrogen but also has a lone pair that also has electron density. However, its molecular shape is based mainly on the bonds between other atoms. So because ammonia is bonded with three other hydrogen atoms but has four spaces of electron density, it's molecular shape is trigonal pyramidal. I hope that helps!

Re: Molecular geometry vs Electron geometry

Posted: Thu Nov 29, 2018 1:37 pm
by Michael Nirula
@timothyho thanks got it