Noble Gases

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					The Noble Gases

Mike Mattei
Dan Hempsey
Dana Lynch
Group 18
  Known as “The Noble Gases”

  The unreactive elements: Helium, neon, argon,
   krypton, xenon and radon

  Exist as single atoms instead of diatomic
   molecules

  Rarely combine with other elements
Helium                                     atomic
HE                                             #2
    Colorless                 Helium remains liquid until
                                absolute zero
    Oderless                  Divers and other people working
    Tasteless                  under pressure use a mixture of
                                helium and oxygen
    Non toxic                 used for filling balloons and
    Most abundant gas in       blimps.
     the universe              Manhattan Project scientists
                                used helium to make the atomic
                                bomb
                               mixed with oxygen, in asthma
                                treatment because it diffuses
                                very easily through the lungs
Neon                                                 atomic
NE                                                      #10
   Sir William Ramsay discovered     •   gives a distinct reddish glow
    neon shortly after the element        when used in vacuum discharge
    krypton in 1898.                      tubes and neon lamps.
•   highly inert                      •   Neon and helium together are
•   forms no known compounds              used to make gas lasers.
   Largest use for neon is in        •   Functions in high voltage
    advertising signs                     indicators.




   All noble gases produce a color
   Helium- yellow
   Neon- red orange
   Aragon- violet
Argon                                             atomic
AR                                                   #18
 • Greek meaning “inactive” due        used to fill incandescent and
   to it’s inactivity                   fluorescent light bulbs to
                                        prevent oxygen from
 • Discovered in 1894                   corroding the hot filament.


 • full outer shell makes it stable    forms inert atmospheres for
   and resistant to bonding with        arc welding and growing
   other elements.                      semiconductor crystals.

                                       dating rocks with a process
                                        called Potassium-Argon
                                        dating
Krypton                                         atomic
KR                                                 #36
    Discovered by William Ramsey
                                        Illuminate strips at
    Greek wording meaning “hidden”.
    White                               airports
    Inert gas                          Used with nitrogen in
  isolated from the air                 fluorescent light
   by liquefaction as                    bulbs so gases will
   the other noble                       not burnout.
   gases                                Used in lighting and
                                         photography
Xenon                                    atomic
XE                                          #54
 Discovered by William          Strobe lights
  Ramsey
                                 once in photographic
 is the rarest of the stable
                                  flash cubes
  noble gases in the air.
 The first noble gas            General anesthetic
  compound was
  produced by Neil Bartlett
  in 1964
 xenon, platinum and
  fluorine.
Radon                                    atomic
RN                                          #86
 Radioactive gas            Uranium decays in rocks and
                              oils
 potential health hazard    Breathing in for a long amount
  in some homes               of time can cause cancer
 Radon is found in
  underground deposits
  where it is produced by
  uranium and radium
  decay.

				
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posted:7/4/2012
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