Drawing Lewis Structures

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

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Mario Reyes 1C
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Joined: Fri Apr 06, 2018 11:04 am

Drawing Lewis Structures

Postby Mario Reyes 1C » Mon May 07, 2018 3:16 pm

When drawing a lewis structure, why do we choose the atom with the lowest ionization energy as the central atom?

Chem_Mod
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Re: Drawing Lewis Structures

Postby Chem_Mod » Mon May 07, 2018 3:22 pm

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.

Chem_Mod
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Re: Drawing Lewis Structures

Postby Chem_Mod » Mon May 07, 2018 3:22 pm

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.

Endri Dis 1J
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Joined: Fri Apr 06, 2018 11:02 am

Re: Drawing Lewis Structures

Postby Endri Dis 1J » Thu May 10, 2018 10:33 pm

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?

Elizabeth Parker 1K
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Joined: Wed Nov 15, 2017 3:00 am

Re: Drawing Lewis Structures

Postby Elizabeth Parker 1K » Fri May 11, 2018 12:36 pm

It doesn't matter right now because it just makes resonance structures. But I think it might change things for three dimensional forms.

Gianna Graziano 1A
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Re: Drawing Lewis Structures

Postby Gianna Graziano 1A » Tue May 15, 2018 10:08 am

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.


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