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### Lewis Structures

Posted: Sat Nov 02, 2019 10:42 pm
When a problem asks to draw the lewis structure of a molecule, are we expected to draw the one with the lowest energy or only when the problem says to?

### Re: Lewis Structures

Posted: Sat Nov 02, 2019 10:43 pm
I think we're supposed to draw the one that is the most stable, i.e. lowest formal charges for each atom (I think that's what you're referring to by 'lowest energy').

### Re: Lewis Structures

Posted: Sat Nov 02, 2019 10:49 pm
The most stable configuration of a molecule is the one with the lowest formal charge, so I would say to always draw the the most stable unless told otherwise.

### Re: Lewis Structures

Posted: Sat Nov 02, 2019 10:50 pm
I think its the one with the lowest energy and ive been hearing that we also have to draw all the resonance structures but I remember Lavelle saying that he would take any structure.

### Re: Lewis Structures

Posted: Sat Nov 02, 2019 11:02 pm
When we are asked to draw a Lewis structure of a molecule the best thing to do is usually draw the structure with the lowest formal change. Always drawing the structure that is the most stable. In the Dino Nuggets review session they said the most stable is always the best.

### Re: Lewis Structures

Posted: Sat Nov 02, 2019 11:20 pm
It's probably safer to write all of the resonance structures unless it specifically states the one with the lowest energy.

### Re: Lewis Structures

Posted: Sun Nov 03, 2019 12:13 am
The one with the lowest energy will always be correct so it safer to draw that and all itâ€™s resonant structures.

### Re: Lewis Structures

Posted: Sun Nov 03, 2019 12:17 am
Also, you can check which Lewis structure has the lowest energy by checking the formal charges. You want the most neutral/nonzero charges as possible.

### Re: Lewis Structures

Posted: Sun Nov 03, 2019 5:38 pm
When we draw lewis structures, should we always assume to draw the resonance structures even if the problem didn't say to do so?

### Re: Lewis Structures

Posted: Sun Nov 03, 2019 6:01 pm
In one of the review sessions, they mentioned that you should always aim to draw the Lewis Structure with the lowest energy. You only need to draw the resonance structures if the questions asks for them.