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potassiummore about potassium

potassium


  3  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Potassium  \Po*tas"si*um\,  n.  [NL.  See  {Potassa},  {Potash}.] 
  (Chem.) 
  An  Alkali  element,  occurring  abundantly  but  always  combined, 
  as  in  the  chloride,  sulphate,  carbonate,  or  silicate,  in  the 
  minerals  sylvite,  kainite,  orthoclase,  muscovite,  etc  Atomic 
  weight  39.0.  Symbol  K  (Kalium). 
 
  Note:  It  is  reduced  from  the  carbonate  as  a  soft  white  metal, 
  lighter  than  water,  which  oxidizes  with  the  greatest 
  readiness,  and  to  be  preserved,  must  be  kept  under 
  liquid  hydrocarbons,  as  naphtha  or  kerosene.  Its 
  compounds  are  very  important,  being  used  in  glass 
  making,  soap  making,  in  fertilizers,  and  in  many  drugs 
  and  chemicals. 
 
  {Potassium  permanganate},  the  salt  {KMnO4},  crystallizing  in 
  dark  red  prisms  having  a  greenish  surface  color,  and 
  dissolving  in  water  with  a  beautiful  purple  red  color;  -- 
  used  as  an  oxidizer  and  disinfectant.  The  name  {chameleon 
  mineral}  is  applied  to  this  salt  and  also  to  potassium 
  manganate. 
 
  {Potassium  bitartrate}.  See  {Cream  of  tartar},  under  {Cream}. 
 
  From  WordNet  r  1.6  [wn]: 
 
  potassium 
  n  :  a  light  soft  silver-white  metallic  element  of  the  alkali 
  metal  group  oxidizes  rapidly  in  air  and  reacts  violently 
  with  water;  is  abundant  in  nature  in  combined  forms 
  occurring  in  sea  water  and  in  carnallite  and  kainite  and 
  sylvite  [syn:  {K},  {atomic  number  19}] 
 
  From  Elements  database  20001107  [elements]: 
 
  potassium 
  Symbol:  K 
  Atomic  number:  19 
  Atomic  weight:  39.0983 
  Soft  silvery  metallic  element  belonging  to  group  1  of  the  periodic  table 
  (alkali  metals).  Occurs  naturally  in  seawater  and  a  many  minerals.  Highly 
  reactive,  chemically,  it  resembles  sodium  in  its  behavior  and  compounds. 
  Discovered  by  Sir  Humphry  Davy  in  1807. 
 
 




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