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I understand the idea of the Lewis Structure and the octet rule. What I don't know is where to place the atoms. And unfortunately my book doesn't explain it. They just draw the lewis structur and expect us to understand how they did it.

For example: Draw the lewis structure of [tex]H_2CO[/tex]

[PLAIN]http://img46.imageshack.us/img46/7392/lewisstructure.png [Broken]

The book's answer is in black. Two other scenarios I drew in red and blue. Are my other scenarios incorrect? Does where you place the outer atoms really matter?

Can someone please help?

Thanks!

For example: Draw the lewis structure of [tex]H_2CO[/tex]

[PLAIN]http://img46.imageshack.us/img46/7392/lewisstructure.png [Broken]

The book's answer is in black. Two other scenarios I drew in red and blue. Are my other scenarios incorrect? Does where you place the outer atoms really matter?

Can someone please help?

Thanks!

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