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sodiummore about sodium


  3  definitions  found 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
  Sodium  \So"di*um\,  n.  [NL.,  fr.E.  soda.]  (Chem.) 
  A  common  metallic  element  of  the  alkali  group  in  nature 
  always  occuring  combined,  as  in  common  salt,  in  albite,  etc 
  It  is  isolated  as  a  soft,  waxy,  white,  unstable  metal,  so 
  readily  oxidized  that  it  combines  violently  with  water,  and 
  to  be  preserved  must  be  kept  under  petroleum  or  some  similar 
  liquid.  Sodium  is  used  combined  in  many  salts,  in  the  free 
  state  as  a  reducer,  and  as  a  means  of  obtaining  other  metals 
  (as  magnesium  and  aluminium)  is  an  important  commercial 
  product.  Symbol  Na  (Natrium).  Atomic  weight  23.  Specific 
  gravity  0.97. 
  {Sodium  amalgam},  an  alloy  of  sodium  and  mercury,  usually 
  produced  as  a  gray  metallic  crystalline  substance,  which 
  is  used  as  a  reducing  agent,  and  otherwise. 
  {Sodium  bicarbonate},  a  white  crystalline  substance, 
  {HNaCO3},  with  a  slight  alkaline  taste  resembling  that  of 
  sodium  carbonate.  It  is  found  in  many  mineral  springs  and 
  also  produced  artificially,.  It  is  used  in  cookery,  in 
  baking  powders,  and  as  a  source  of  carbonic  acid  gas 
  (carbon  dioxide)  for  soda  water.  Called  also  {cooking 
  soda},  {saleratus},  and  technically,  {acid  sodium 
  carbonate},  {primary  sodium  carbonate},  {sodium 
  dicarbonate},  etc 
  {Sodium  carbonate},  a  white  crystalline  substance, 
  {Na2CO3.10H2O},  having  a  cooling  alkaline  taste,  found  in 
  the  ashes  of  many  plants,  and  produced  artifically  in 
  large  quantities  from  common  salt.  It  is  used  in  making 
  soap,  glass,  paper,  etc.,  and  as  alkaline  agent  in  many 
  chemical  industries.  Called  also  {sal  soda},  {washing 
  soda},  or  {soda}.  Cf  {Sodium  bicarbonate},  above  and 
  {Sodium  chloride},  common,  or  table,  salt,  {NaCl}. 
  {Sodium  hydroxide},  a  white  opaque  brittle  solid,  {NaOH}, 
  having  a  fibrous  structure,  produced  by  the  action  of 
  quicklime,  or  of  calcium  hydrate  (milk  of  lime),  on  sodium 
  carbonate.  It  is  a  strong  alkali,  and  is  used  in  the 
  manufacture  of  soap,  in  making  wood  pulp  for  paper,  etc 
  Called  also  {sodium  hydrate},  and  {caustic  soda}.  By 
  extension,  a  solution  of  sodium  hydroxide. 
  From  WordNet  r  1.6  [wn]: 
  n  :  a  silvery  soft  waxy  metallic  element  of  the  alkali  metal 
  group  occurs  abundantly  in  natural  compounds  (especially 
  in  salt  water);  burns  with  a  yellow  flame  and  reacts 
  violently  in  water;  occurs  in  sea  water  and  in  the 
  mineral  halite  (rock  salt)  [syn:  {Na},  {atomic  number  11}] 
  From  Elements  database  20001107  [elements]: 
  Symbol:  Na 
  Atomic  number:  11 
  Atomic  weight:  22.9898 
  Soft  silvery  reactive  element  belonging  to  group  1  of  the  periodic  table 
  (alkali  metals).  It  is  highly  reactive,  oxidizing  in  air  and  reacting 
  violently  with  water,  forcing  it  to  be  kept  under  oil.  It  was  first 
  isolated  by  Humphrey  Davy  in  1807. 

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