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Charge question

For (ii), why is there a minus charge on the oxygens? and why isn't there a charge on the NH2?
Screenshot 2023-05-13 154530.jpg
Original post by Amamiya
For (ii), why is there a minus charge on the oxygens? and why isn't there a charge on the NH2?
Screenshot 2023-05-13 154530.jpg

The two oxygen atoms have charges because they are part of the ethandioate ion.
The amine groups have no charge, they donate a lone pair that's on the nitrogen.

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