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potassium
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English Dictionary: potassium by the DICT Development Group
3 results for potassium
From WordNet (r) 3.0 (2006) [wn]:
potassium
n
  1. 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
    Synonym(s): potassium, K, atomic number 19
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 The Elements (22Oct97) [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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