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### Formal charge

Posted: Sat Nov 03, 2018 8:00 pm
When we form double bonds, do we always need to check the formal charge of all the elements?

### Re: Formal charge

Posted: Sat Nov 03, 2018 8:12 pm
Yes, if you want to find the most stable form.

### Re: Formal charge

Posted: Sat Nov 03, 2018 9:56 pm
Yes because it will determine where the double bond should go

### Re: Formal charge

Posted: Sun Nov 04, 2018 7:52 pm
You should always check the formula charge when you're drawing a lewis structure no matter way. This way you can make sure that the lewis structure you drew is the best one.

### Re: Formal charge

Posted: Mon Nov 05, 2018 1:03 am
Do you always check for formal charges even for single bonds?

### Re: Formal charge

Posted: Mon Nov 05, 2018 1:06 am
yes, you always check formal charge no matter how many bonds.

### Re: Formal charge

Posted: Mon Nov 05, 2018 6:34 am
Soyoung Park 1H wrote:Do you always check for formal charges even for single bonds?

Yes to make sure that your Lewis structure is the most stable form or if additional bonds need to be made (with respect to the octet rule) in order to increase stability

### Re: Formal charge

Posted: Mon Nov 05, 2018 8:40 am
YES!
1. Count valence electrons (left to right on periodic table using s and p only - I think)
2. Create molecule's lewis structure
3. Find the FC of each molecule, Subtract the valence # of each molecule by the amount of dots and lines for each.
4. Try to rearrange to get it to be the most stable it can be when FC=0 on all, but if not possible, then bracket your lewis structure and add a + or - (+1,+2,+3, etc.. or -1,-2,-3, etc... is based on the summation of total formal charges...)