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gallium

more about gallium

gallium


  5  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Gallium  \Gal"li*um\,  n.  [NL.;  perh.  fr  L.  Gallia  France.] 
  (Chem.) 
  A  rare  metallic  element,  found  combined  in  certain  zinc  ores. 
  It  is  white,  hard,  and  malleable,  resembling  aluminium,  and 
  remarkable  for  its  low  melting  point  (86[deg]  F.,  30[deg] 
  C.).  Symbol,  Ga  at  wt.,  69.9.  Gallium  is  chiefly  trivalent, 
  resembling  aluminium  and  indium.  It  was  predicted  with  most 
  of  its  properties,  under  the  name  eka-aluminium,  by 
  Mendelyeev  on  the  basis  of  the  periodic  law.  This  prediction 
  was  verified  in  its  discovery  (in  1875)  by  its  characteristic 
  spectrum  (two  violet  lines). 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Ekaluminium  \Ek*al`u*min"i*um\,  n.  [Skr.  [=e]ka  one  +  E. 
  aluminium.]  (Chem.) 
  The  name  given  to  a  hypothetical  element,  --  later  discovered 
  and  called  {gallium}.  See  {Gallium},  and  cf  {Ekabor}. 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Gallium  \Gal"li*um\,  n.  [NL.,  fr  L.  Gallia  France.]  (Chem.) 
  A  rare  metallic  element,  found  in  certain  zinc  ores.  It  is 
  white,  hard,  and  malleable,  resembling  aluminium,  and 
  remarcable  for  its  low  melting  point  (86?  F.,  30?C).  Symbol 
  Ga  Atomic  weight  69.9. 
 
  Note:  The  element  was  predicted  with  most  of  its  properties, 
  under  the  name  ekaluminium,  by  the  Russian  chemist 
  Mendelejeff  on  the  basis  of  the  Periodic  law.  This 
  prediction  was  verified  in  its  discovery  by  the  French 
  chemist  Lecoq  de  Boisbaudran  by  its  characteristic 
  spectrum  (two  violet  lines),  in  an  examination  of  a 
  zinc  blende  from  the  Pyrenees. 
 
  From  WordNet  r  1.6  [wn]: 
 
  gallium 
  n  :  a  rare  silvery  (usually  trivalent)  metallic  element;  brittle 
  at  low  temperatures  but  liquid  above  room  temperature; 
  occurs  in  trace  amounts  in  bauxite  and  zinc  ores  [syn:  {Ga}, 
  {atomic  number  31}] 
 
  From  Elements  database  20001107  [elements]: 
 
  gallium 
  Symbol:  Ga 
  Atomic  number:  31 
  Atomic  weight:  69.72 
  Soft  silvery  metallic  element,  belongs  to  group  13  of  the  periodic  table. 
  The  two  stable  isotopes  are  Ga-69  and  Ga-71.  Eight  radioactive  isotopes 
  are  known  all  having  short  half-lives.  Gallium  Arsenide  is  used  as  a 
  semiconductor.  Corrodes  most  other  metals  by  diffusing  into  their  lattice. 
  First  identified  by  Francois  Lecoq  de  Boisbaudran  in  1875. 
 
 




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