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Drawing Lewis Structures

Posted: Mon May 07, 2018 3:16 pm
by Mario Reyes 1C
When drawing a lewis structure, why do we choose the atom with the lowest ionization energy as the central atom?

Re: Drawing Lewis Structures

Posted: Mon May 07, 2018 3:22 pm
by Chem_Mod
The central atom is forced to share its valence e- with the atoms its bonded to. Atoms with a low ionization energy are able to give up their e- more easily and thus can share these e-. Therefore having the central atom be the atom with the lowest ionization energy is favored.

Re: Drawing Lewis Structures

Posted: Mon May 07, 2018 3:22 pm
by Chem_Mod
If an atom has low ionization energy, it means that it is easy to form an ion. The central atom of a molecule is usually connected to multiple other atoms, so the central atom would can better hold on to other atoms by acquiring a charge itself.

Re: Drawing Lewis Structures

Posted: Thu May 10, 2018 10:33 pm
by Endri Dis 1J
When we draw Lewis structures and we have to use a double bond like in CH20 does the order or side where the double bond is drawn matter?

Re: Drawing Lewis Structures

Posted: Fri May 11, 2018 12:36 pm
by Elizabeth Parker 1K
It doesn't matter right now because it just makes resonance structures. But I think it might change things for three dimensional forms.

Re: Drawing Lewis Structures

Posted: Tue May 15, 2018 10:08 am
by Gianna Graziano 1A
Hi Endri,
It does not matter in this case, it is one form of a few resonance structures. Basically this means that a Lewis Structure can be drawn in more ways than one.