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© May 2005 Lorentz JÄNTSCHI && Sorana Daniela BOLBOACĂ

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 D01 Inorganic Chemicals D007287 +
  D01.268 Elements D004602 +
   D01.268.271 Elements, Radioactive D004603 +
     D01.268.271.110 Astatine D001246 
     D01.268.271.380 Francium D005605 
     D01.268.271.545 Actinoid Series Elements D008671 +
     D01.268.271.680 Polonium D011059 
     D01.268.271.720 Promethium D011399 
     D01.268.271.770 Radium D011883 
     D01.268.271.800 Radon D011886 
     D01.268.271.870 Technetium D013667