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kryptonmore about krypton

krypton

 

  4  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Krypton  \Kryp"ton\,  n.  [NL.,  fr  Gr  ?,  neut.  of  ?  hidden.] 
  (Chem.) 
  An  inert  gaseous  element  of  the  argon  group  occurring  in  air 
  to  the  extent  of  about  one  volume  in  a  million.  It  was 
  discovered  by  Ramsay  and  Travers  in  1898.  Liquefying  point, 
  --  152[deg]  C.;  symbol,  Kr  atomic  weight,  83.0. 
 
  From  WordNet  r  1.6  [wn]: 
 
  krypton 
  n  :  a  colorless  element  that  is  one  of  the  six  inert  gasses; 
  occurs  in  trace  amounts  in  air  [syn:  {Kr}] 
 
  From  The  Free  On-line  Dictionary  of  Computing  (13  Mar  01)  [foldoc]: 
 
  KRYPTON 
 
  A  {frame}  language. 
 
  ["An  Essential  Hybrid  Reasoning  System:  Knowledge  and  Symbol 
  Level  Accounts  of  of  KRYPTON",  R.J.  Brachman  et  al  Proc 
  IJCAI-85,  1985]. 
 
 
 
  From  Elements  database  20001107  [elements]: 
 
  krypton 
  Symbol:  Kr 
  Atomic  number:  36 
  Atomic  weight:  83.80 
  Colorless  gaseous  element,  belongs  to  the  noble  gases.  Occurs  in  the  air, 
  0.0001%  by  volume.  It  can  be  extracted  from  liquid  air  by  fractional 
  distillation.  Generally  not  isolated,  but  used  with  other  inert  gases  in 
  fluorescent  lamps.  Five  natural  isotopes,  and  five  radioactive  isotopes. 
  Kr-85,  the  most  stable  radioactive  isotope,  has  a  half-life  of  10.76 
  years  and  is  produced  in  fission  reactors.  Practically  inert,  though  known 
  to  form  compounds  with  {fluorine}.




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