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regions of electron density

Posted: Sun Nov 17, 2019 8:25 am
by Cavalli_1H
what exactly do regions of 'electron density' mean? I know it would have to include bonds but does it include lone pairs as well?

Re: regions of electron density

Posted: Sun Nov 17, 2019 9:57 am
by Kehlin Hayes 4C
Yes it is the area that electrons are most likely found

Re: regions of electron density

Posted: Sun Nov 17, 2019 10:05 am
by 405268063
Yes, regions of electron density include both bonds and lone pairs.

Re: regions of electron density

Posted: Sun Nov 17, 2019 12:33 pm
by MeeraBhagat
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.

Re: regions of electron density

Posted: Sun Nov 17, 2019 1:26 pm
by chari_maya 3B
Why is knowing the number of regions of electron density necessary when naming a molecule?

Re: regions of electron density

Posted: Sun Nov 17, 2019 1:35 pm
by Ashley Kumar 3F
its areas where electrons are most likely found so yes it does include lone pairs

Re: regions of electron density

Posted: Sun Nov 17, 2019 2:46 pm
by Lauren Sanchez 3D
Regions of electron density include bonding pairs as well as lone pairs.

Re: regions of electron density

Posted: Sun Nov 17, 2019 2:50 pm
by Nare Arakelian Dis 3E
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!

Re: regions of electron density

Posted: Sun Nov 17, 2019 3:33 pm
by Abigail_Hagen2G
Recognizing regions of electron density does give an idea of the general shape, but the actual atoms give it a name.

Re: regions of electron density

Posted: Sun Nov 17, 2019 4:01 pm
by AryaG_4C
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.

Re: regions of electron density

Posted: Sun Nov 17, 2019 4:26 pm
by Ayushi2011
Regions where electrons are found, as the name suggests, the region where the electrons are most dense around an atom.