Identifying the Charge

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Samantha Burmester 3H
Posts: 43
Joined: Fri Sep 28, 2018 12:23 am

Identifying the Charge

Postby Samantha Burmester 3H » Sun Oct 28, 2018 11:34 pm

Why do we have to identify the charge in the Lewis structure if we already added/subtracted the appropriate number of electrons based on the charge of the atom?

Elias Omar 1G
Posts: 52
Joined: Fri Sep 28, 2018 12:17 am

Re: Identifying the Charge

Postby Elias Omar 1G » Sun Oct 28, 2018 11:51 pm

I'm not exactly sure what you're asking, but I think the answer to your question is that sometimes the molecule itself is an ion, and so after adding up the charges of the atom's themselves, you have to subtract or add electrons based on the charge (i.e. if its a 2+ molecule you have to remove 2 electrons from whatever the sum of the valence electrons of the atoms making up the molecule are).

Laura Gong 3H
Posts: 89
Joined: Fri Sep 28, 2018 12:26 am
Been upvoted: 1 time

Re: Identifying the Charge

Postby Laura Gong 3H » Mon Oct 29, 2018 1:29 pm

Calculating the formal charges of each atom can help you determine the best lewis structure for a particular molecule and like Elias said, confirm the overall charge of the atom.


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