Friday
July 25, 2014

Homework Help: Chemistry

Posted by Nelle on Saturday, March 7, 2009 at 2:43pm.

I have a compound of Na2subscriptCO3subscript. The cation it breaks into is NA+1 in the upper righthand corner, and the anion is CO3subscript,-2in the upper right hand corner. Where did the anion numbers come from? How can you tell what the charge is? I know you either look in the periodic table square, or at the top of the periodic column, but I don't see where the charge of -2 comes from since carbon is in the +4 column. Thanks for clarifying this.

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