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unnilseptiummore about unnilseptium

unnilseptium


  2  definitions  found 
 
  From  WordNet  r  1.6  [wn]: 
 
  unnilseptium 
  n  :  a  transuranic  element  that  has  not  been  found  in  nature 
  [syn:  {Uns},  {element  107},  {atomic  number  107}] 
 
  From  Elements  database  20001107  [elements]: 
 
  unnilseptium 
  Symbol: 
  Atomic  number:  107 
  Atomic  weight:  (262) 
  Radioactive  transition  metal.  Half-life  of  approximately  1/500  s. 
  Discovered  by  the  Joint  Institute  for  Nuclear  Research  at  Dubna  (U.S.S.R.) 
  in  1976.  Confirmed  by  West  German  physicists  at  the  Heavy  Ion  Research 
  Laboratory  at  Darmstadt. 
 
 




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