regions of electron density
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regions of electron density
what exactly do regions of 'electron density' mean? I know it would have to include bonds but does it include lone pairs as well?
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Re: regions of electron density
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.
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Re: regions of electron density
Why is knowing the number of regions of electron density necessary when naming a molecule?
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Re: regions of electron density
its areas where electrons are most likely found so yes it does include lone pairs
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Re: regions of electron density
Regions of electron density include bonding pairs as well as lone pairs.
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Re: regions of electron density
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!
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Re: regions of electron density
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
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.
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Re: regions of electron density
Regions where electrons are found, as the name suggests, the region where the electrons are most dense around an atom.
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