isotope anomalies and the justification for atomic mass and frequency in table of elements, radioactivity and its applications for powerpoint presentation, periodic table
http://digilander.libero.it/francescovise/chimica/serie.htm
atomic structure and radioactivity
http://digilander.libero.it/furlanma/museo/fisici.html
isotopes http://utenti.multimania.it/fumarino/chimica/isotopi.htm
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