Alkali metals Chintal

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					               Alkali metals
   Properties
   Flame colors over the Bunsen burner
   Application
   Video on How alkali metals reacts with
    water



                             Chintal Desai
Periodic table
           Lithium (Lithos) (Li)
                             Crimson red flame
   It is the first
    member of the
    Alkali Metal family.

   Lithium is the
    lightest of all
    metals
          Application of Li

 It compounds are used in certain
  kinds of glass and porcelain
  products.
 More recently lithium has become
  important in dry-cell batteries and
  nuclear reactors.
 Some compounds of lithium have
  been used to treat manic
  depressives.
            Sodium (Natria) Na
   Sodium is perhaps the     Silvery white
    most characteristic
    alkali metal.
                                              Golden yellow
   Reacts violently with
    water and rapidly with
    the oxygen in air.

   Soft enough to cut with
    a knife.

   It is the sixth most
    abundant element in the
    earth's crust.
         Application of Na
 Sodium in its elemental state it has
  been used as a molten coolant in
  nuclear reactors
 Is currently under research for
  sodium/sulfur batteries.
 Its most common compounds for
  industrial use include sodium
  chloride, sodium hydroxide (lye),
  sodium carbonate (washing soda)
  and sodium sulfate.
          Potassium (kalium ) K
                            pale lavender


   The seventh most
    abundant element.

   Potassium is less
    dense than water

   Potassium reacts so
    violently with water
    that it bursts into
    flame
     Application of Potassium
Important compounds of potassium include
 potassium hydroxide (KOH) (used in some
  drain cleaners),
 potassium superoxide, KO2,( used in
  respiratory equipment )
 potassium nitrate, used in fertilizers and
  pyrotechnics.
 Like sodium ions, the presence of
  potassium ions in the body is essential for
  the correct function of many cells
Rubidium (Latin: rubidius = red)
                               Violet
   Is similar in physical
    and chemical
    characteristics to
    potassium, but much
    more reactive.
    It is the seventeenth
    most abundant
    element.
    Its melting point is so
    low you could melt it
    in your hand if you
    had a fever (39oC).
    (Dangerous!!)
         Application of Rb
 Rubidium was once thought to be
  quite rare but recent discoveries of
  large deposits indicate that there is
  plenty to use.
 However at present it finds only
  limited application in the
  manufacture of cathode ray tubes.

				
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