Lewis Structures

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sarahwu3a
Posts: 50
Joined: Sat Aug 17, 2019 12:17 am

Lewis Structures

Postby sarahwu3a » Sat Nov 09, 2019 11:39 am

For molecules with only 2 atoms and a single charge, how do you determine which atom gets the charge and which atom has a formal charge of zero?

Reagan Smith 1H
Posts: 50
Joined: Sat Jul 20, 2019 12:16 am

Re: Lewis Structures

Postby Reagan Smith 1H » Sat Nov 09, 2019 12:46 pm

You put the negative formal charge on the more electronegative atom.

Amina Durrani 3G
Posts: 52
Joined: Sat Jul 20, 2019 12:16 am

Re: Lewis Structures

Postby Amina Durrani 3G » Sat Nov 09, 2019 1:07 pm

The more electronegative atom should have a negative charge if the other atom’s charge is 0, but it should have a 0 charge if the other atom’s charge is positive.

MBouwman_4A
Posts: 40
Joined: Wed Sep 18, 2019 12:21 am

Re: Lewis Structures

Postby MBouwman_4A » Sat Nov 09, 2019 5:23 pm

Electrons are shifted toward the more electronegative atom, so the more electronegative atom is the one with the negative charge.

Qilan Li 4I
Posts: 54
Joined: Mon Jun 17, 2019 7:23 am

Re: Lewis Structures

Postby Qilan Li 4I » Sat Nov 09, 2019 5:57 pm

You would have to find out the formal charge of both atoms. I usually do this by comparing the number of electrons that are surrounding an atom with the number of electrons the neutral atom normally has. However, the atom with greater electronegativity usually has a negative charge or at least that is how you should draw your lewis structure according to my TA.


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