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...Periodic table of the elements with relative atomic masses according to iupac i ii iii iv v vi vii viii h he number li be symbol b c n o f ne mass na mg al si p s cl ar k ca sc ti cr mn fe co ni cu zn ga ge as se br kr rb sr y zr nb mo tc ru rh pd ag cd in sn sb te xe la cs ba lu hf ta w re os ir pt au hg tl pb bi po at rn ac fr ra lr db rf bh mt ce pr nd pm sm eu gd tb dy ho er tm yb th pa u np pu am cm bk cf es fm md no based on after weights pure and applied chemistry for which lack stable isotope is most given parentheses or by isotopic mixture present earth chemical symbols names transfermium recommendations copyright mats dahlgren...