Lewis Structure

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Riya Sood 4G
Posts: 160
Joined: Sat Aug 24, 2019 12:18 am

Lewis Structure

Postby Riya Sood 4G » Mon Nov 04, 2019 10:35 am

How to chose the central atom when drawing Lewis Structures?

Alexis Webb 2B
Posts: 124
Joined: Thu Jul 11, 2019 12:15 am

Re: Lewis Structure

Postby Alexis Webb 2B » Mon Nov 04, 2019 10:37 am

It’s typically the one with the lower ionization energy. After doing a lot of practice problems, I just noticed which atoms typically are in the center like carbon and such.

EricZhao3G
Posts: 51
Joined: Tue Oct 08, 2019 12:16 am

Re: Lewis Structure

Postby EricZhao3G » Mon Nov 04, 2019 1:50 pm

The element with the lowest ionization energy goes in the center of the Lewis structure. Ionization energy decreases down a group and increases across a period.

Christineg1G
Posts: 115
Joined: Fri Aug 09, 2019 12:15 am
Been upvoted: 1 time

Re: Lewis Structure

Postby Christineg1G » Mon Nov 04, 2019 2:35 pm

After determining the number of valence electrons for each element, you would use the element with the lowest ionization energy. Also, know that H can never be the central atom.

Heba Mengesha 3D
Posts: 50
Joined: Sat Sep 07, 2019 12:19 am

Re: Lewis Structure

Postby Heba Mengesha 3D » Mon Nov 04, 2019 8:50 pm

Usually the central atom will be the one that has the most unpaired valence electrons. The central atom is also usually the least electronegative.


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