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molecule
a neutral group of atoms held together by chemical bonds
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  June 16 in chemistry
  1869 - Henry E. Roscoe announced isolation of vanadium metal.
  1897 - Georg Wittig born: organophosphorus chemistry (e.g. Wittig olefination) and Wittig rearrangement; Nobel Prize, 1979.
   sources: http://webserver.lemoyne.edu/faculty/giunta/week.html, http://todayinsci.com
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