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   From: g-warren@myway.com   
      
   pv+usenet@pobox.com (PV) wrote in   
   news:nPydnQNhJJQCuX_XnZ2dnUVZ_jxi4p2d@supernews.com:   
      
   > David Johnston  writes:   
   >>>Then you never learned how to read the periodic table. *   
   >>   
   >>When I look up the definition of deuterium it doesn't say that it is   
   >>an element.   
   >   
   > Deuterium is Hydrogen. It's an element. This is not complicated. *   
      
   Hydrogen is an element.  Deuterium is an isotope of hydrogen,   
   specifically hydrogen-2.  Just like carbon-14 is an isotope of carbon.   
      
   An element is defined by its atomic number, which is the number of   
   protons.  An isotope is defined by the number of protons and the mass   
   number, and is thus more specific than an element.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)