I bought this book of practice problems.  Im looking for the formula for Cobalt (II) bromate.  It says the answer is Co(BrO3)2     How do you get to that answer?  I wrote it as Co3BrO2.  But apparently I’m wrong.  Can anyone explain it for me?  Thanks

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Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.