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cerium

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cerium


  3  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Cerium  \Ce"ri*um\,  n.  [Named  by  Berzelius  in  1803  from  the 
  asteroid  Ceres,  then  just  discovered  (1801).]  (Chem.) 
  A  rare  metallic  element,  occurring  in  the  minerals  cerite, 
  allanite,  monazite,  etc  Symbol  Ce  Atomic  weight  141.5.  It 
  resembles  iron  in  color  and  luster,  but  is  soft,  and  both 
  malleable  and  ductile.  It  tarnishes  readily  in  the  air. 
 
  From  WordNet  r  1.6  [wn]: 
 
  cerium 
  n  :  a  ductile  gray  metallic  element  of  the  lanthanide  series; 
  used  in  lighter  flints;  the  most  abundant  of  the 
  rare-earth  group  [syn:  {Ce},  {atomic  number  58}] 
 
  From  Elements  database  20001107  [elements]: 
 
  cerium 
  Symbol:  Ce 
  Atomic  number:  58 
  Atomic  weight:  140.12 
  Silvery  metallic  element,  belongs  to  the  lanthanoids.  Four  natural 
  isotopes  exist,  and  fifteen  radioactive  isotopes  have  been  identified. 
  Used  in  some  rare-earth  alloys.  The  oxidized  form  is  used  in  the  glass 
  industry.  Discovered  by  Martin  .H.  Klaproth  in  1803. 
 
 




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