sjbaybutt Posted April 23, 2013 Posted April 23, 2013 1st = 9.012182 2nd= 18.9984032 5th ? What does all this mean, im new here
hypervalent_iodine Posted May 23, 2013 Posted May 23, 2013 http://www.iupac.org/publications/pac/1991/pdf/6307x0975.pdf As best as I could tell from your very vague question, you're looking at atomic weights.
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