How to Determine Electron Density


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Mya Majewski 1L
Posts: 89
Joined: Fri Sep 25, 2015 3:00 am

How to Determine Electron Density

Postby Mya Majewski 1L » Fri Oct 30, 2015 6:16 pm

How do you calculate the number of electron density regions?

Kahlo Baniadam 3F
Posts: 21
Joined: Fri Sep 25, 2015 3:00 am

Re: How to Determine Electron Density

Postby Kahlo Baniadam 3F » Fri Oct 30, 2015 7:37 pm

It's the number of bonds or lone pairs around it. For example NH3, the N is bonded to each H and has its own lone pair, so 4 regions of electron density

Leena Tran 2K
Posts: 20
Joined: Fri Sep 25, 2015 3:00 am

Re: How to Determine Electron Density

Postby Leena Tran 2K » Sat Oct 31, 2015 12:39 pm

Also, a bond is counted as a single region of electron density regardless of whether it is a single, double, or triple bond. For example, the Lewis Structure of phosphate (PO4^3-) shows it to have 3 single bonds and a double bond. There are 4 regions of electron density.

Sophia Xu 3F
Posts: 21
Joined: Fri Sep 25, 2015 3:00 am

Re: How to Determine Electron Density

Postby Sophia Xu 3F » Mon Nov 02, 2015 4:31 pm

The number of bonds an atom has to form with other atoms + region of unpaired electrons.
Hope that helps!

Chem_Mod
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Re: How to Determine Electron Density

Postby Chem_Mod » Mon Nov 02, 2015 7:24 pm

Good answers. Remember, a double bond counts as just one region of electron density, not two. Likewise, a triple bond counts as one region of electron density.


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