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Noble Gases
chemically inert, gaseous, all occur in the atmosphere except Radon
Preparation for Helium
similar method with natural gases
Preparation for Radon
produced during natural decay of Radium
Preparation for Argon, Neon, Krypton and Xenon
produced commercially from liquid air by fractionation process
Helium
2nd lightest gas, carrier/diluent of medicinally important gas
Toxicity of Helium
Donald Duck’s Sound
Helium’s color of cylinder
brown cylinder
Used in the preparation of synthetic airs
low density, low solubility in blood
Low solubility in blood
easier blood/distribution of gas
Helium’s component of Artificial Air
He 80%, O2 20%
Neon
for advertising neon lights, and no pharmaceutical use
Argon
most abundant noble gas
Argon
substitute with N2 gas in providing an inert atmosphere
Argon’s color of container
dark green container
Oxidizable
Exposure to air can cause oxidizable substances to undergo oxidation.
Krypton
has inhalational anesthetic activity
Isolated Krypton
Ramsay & Travers
Xenon
investigational inhalational anesthetic gas
Xenon
least abundant of all noble gases
Stable fluorides of Xenon
difluoride, tetrafluoride, hexafluoride
Crystalline forms of Xenon
sodium perxenate and perkryptate
Radon
inert gas given off by Radium salts
Radon
a radioactive element used in the treatment of certain cancers