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strontiummore about strontium

strontium


  3  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Strontium  \Stron"ti*um\,  n.  [NL.  See  {Strontia}.]  (Chem.) 
  A  metallic  element  of  the  calcium  group  always  naturally 
  occurring  combined,  as  in  the  minerals  strontianite, 
  celestite,  etc  It  is  isolated  as  a  yellowish  metal,  somewhat 
  malleable  but  harder  than  calcium.  It  is  chiefly  employed  (as 
  in  the  nitrate)  to  color  pyrotechnic  flames  red.  Symbol  Sr 
  Atomic  weight  87.3. 
 
  From  WordNet  r  1.6  [wn]: 
 
  strontium 
  n  :  a  soft  silver-white  or  yellowish  metallic  element  of  the 
  alkali  metal  group  turns  yellow  in  air;  occurs  in 
  celestite  and  strontianite  [syn:  {Sr},  {atomic  number  38}] 
 
  From  Elements  database  20001107  [elements]: 
 
  strontium 
  Symbol:  Sr 
  Atomic  number:  38 
  Atomic  weight:  87.62 
  Soft  yellowish  metallic  element,  belongs  to  group  2  of  the  periodic 
  table.  Highly  reactive  chemically.  Sr-90  is  present  in  radioactive  fallout 
  and  has  a  half-life  of  28  years.  Discovered  in  1798  by  Klaproth  and  Hope, 
  isolated  in  1808  by  Humphry  Davy. 
 
 




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