regions of electron density

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

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Cavalli_1H
Posts: 92
Joined: Thu Sep 19, 2019 12:15 am

regions of electron density

Postby Cavalli_1H » Sun Nov 17, 2019 8:25 am

what exactly do regions of 'electron density' mean? I know it would have to include bonds but does it include lone pairs as well?

Kehlin Hayes 4C
Posts: 50
Joined: Wed Sep 18, 2019 12:17 am

Re: regions of electron density

Postby Kehlin Hayes 4C » Sun Nov 17, 2019 9:57 am

Yes it is the area that electrons are most likely found

405268063
Posts: 102
Joined: Thu Jul 25, 2019 12:17 am

Re: regions of electron density

Postby 405268063 » Sun Nov 17, 2019 10:05 am

Yes, regions of electron density include both bonds and lone pairs.

MeeraBhagat
Posts: 95
Joined: Sat Aug 24, 2019 12:15 am

Re: regions of electron density

Postby MeeraBhagat » Sun Nov 17, 2019 12:33 pm

Regions of electron density are the number of locations where electrons are more present. The number of regions is equivalent to how many atoms are bonded to the central atom plus any regions of lone pair electrons.

chari_maya 3B
Posts: 108
Joined: Sat Sep 07, 2019 12:18 am

Re: regions of electron density

Postby chari_maya 3B » Sun Nov 17, 2019 1:26 pm

Why is knowing the number of regions of electron density necessary when naming a molecule?

Ashley Kumar 3F
Posts: 50
Joined: Sat Sep 07, 2019 12:18 am

Re: regions of electron density

Postby Ashley Kumar 3F » Sun Nov 17, 2019 1:35 pm

its areas where electrons are most likely found so yes it does include lone pairs

Lauren Sanchez 3D
Posts: 52
Joined: Sat Aug 24, 2019 12:17 am

Re: regions of electron density

Postby Lauren Sanchez 3D » Sun Nov 17, 2019 2:46 pm

Regions of electron density include bonding pairs as well as lone pairs.

Nare Arakelian Dis 3E
Posts: 58
Joined: Thu Jul 11, 2019 12:16 am

Re: regions of electron density

Postby Nare Arakelian Dis 3E » Sun Nov 17, 2019 2:50 pm

chari_maya 3B wrote:Why is knowing the number of regions of electron density necessary when naming a molecule?


The number of regions of electron density affect the shape of the molecule, but the naming of the molecule comes from only the bonded atoms, not the lone pairs. So if a molecule has 4 regions of electron density, but one of them is a lone pair, it is trigonal pyramidal and not tetrahedral. Hope this helps!

Abigail_Hagen2G
Posts: 107
Joined: Fri Aug 09, 2019 12:17 am

Re: regions of electron density

Postby Abigail_Hagen2G » Sun Nov 17, 2019 3:33 pm

Recognizing regions of electron density does give an idea of the general shape, but the actual atoms give it a name.

AryaG_4C
Posts: 50
Joined: Mon Sep 30, 2019 12:16 am

Re: regions of electron density

Postby AryaG_4C » Sun Nov 17, 2019 4:01 pm

An example of when atom positions influence the shape is for the sulfite ion (SO3)^2-. In this, there are three bonding pairs and one lone pair. Thus, although the molecular shape tetrahedral to reduce repulsion the name of the shape is trigonal pyramid.

Ayushi2011
Posts: 101
Joined: Wed Feb 27, 2019 12:17 am

Re: regions of electron density

Postby Ayushi2011 » Sun Nov 17, 2019 4:26 pm

Regions where electrons are found, as the name suggests, the region where the electrons are most dense around an atom.


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