Electron Arrangement vs. Molecular Shape

(Polar molecules, Non-polar molecules, etc.)

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Jonathan Pai 2I
Posts: 121
Joined: Fri Sep 28, 2018 12:27 am

Electron Arrangement vs. Molecular Shape

Postby Jonathan Pai 2I » Sun Nov 25, 2018 6:43 pm

What is the difference? What terms are used to describe each one?

Desiree1G
Posts: 62
Joined: Fri Sep 28, 2018 12:16 am
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Re: Electron Arrangement vs. Molecular Shape

Postby Desiree1G » Sun Nov 25, 2018 6:50 pm

Hi, so I had had the same question, but I learned that electron arrangement basically means all the electron densities around the atom. In other words, all the stuff around it so that could be the other element(s) and any lone pair of electrons, (this is the steric number.) Once you have this, you look at the VSPER chart (https://goo.gl/images/b1uSPm) I like this one I linked. The molecular shape however is the actual shape of the molecule which could be anything like bent, linear, seesaw, etc.

WilliamNguyen_4L
Posts: 65
Joined: Fri Sep 28, 2018 12:28 am

Re: Electron Arrangement vs. Molecular Shape

Postby WilliamNguyen_4L » Sun Nov 25, 2018 6:57 pm

To add on, the electron arrangement only considers the number of areas of electron density around the central atom. The actual molecule shape factors in the repulsion that results from lone pair electrons which results in shapes with angles other than 90, 120, and 180.


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