chemistry grade 10

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i don't really get the idea of what a poly atimic ions is. i couldn't understand the meaning from my textbook. can u plz explain it to me.

thanks alot!!!

  • chemistry grade 10 -

    poly atomic: make of more than one atom

    CO3 is an example

    polyatomic ion: made up of more than one atom, and has an excess charge

    CO3-2

    You need to learn the formulas, names, and charges of these very quickly. I recommend flash cards.

  • chemistry grade 10 -

    flash card? what is that?

  • chemistry grade 10 -

    http://en.wikipedia.org/wiki/Flashcard

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