Massa atom relatif: Perbedaan antara revisi
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Baris 64:
*[http://physics.nist.gov/cgi-bin/Compositions/stand_alone.pl?ele=&ascii=html&isotype=some NIST relative atomic masses of all isotopes and the standard atomic weights of the elements]
*[http://goldbook.iupac.org/publications/pac/85/5/1047/ Atomic Weights of the Elements 2011]
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