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| Did you know???; helium | |
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| Tweet Topic Started: Sep 10 2007, 09:55 AM (83 Views) | |
| AloeGal | Sep 10 2007, 09:55 AM Post #1 |
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http://www.carondelet.pvt.k12.ca.us/Family...ble%20gases.htm All of the Noble Gases are gases. The noble gases are all found in minute quantities in the atmosphere, and are isolated by fractional distillation of liquid air. Helium can be obtained from natural gas wells where it has accumulated as a result of radioactive decay. All these gases are monatomic. They boil at low temperatures as only dispersion forces act between the atoms. Helium has the lowest boiling point of any substance at 4.2K. The 1st ionization energy decreases on descending the Group, as the valence shell becomes further away from the nucleus and electrons become easier to remove. The first ionization energy of xenon is comparable with that of bromine, which explains why xenon forms compounds with oxygen and fluorine relatively easily. The oxidation numbers of xenon in its compounds are +2, +4, +6 and +8. The Noble Gases have important industrial functions. Ever breathed in helium??? And we take anti-oxidants to offset the oxidation process which causes aging!!! This also fits in with my post in the Iodine Section /Toxic Stuff in the Home by buddygirl. |
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Blessings, AloeGal You never know why you're alive until you know what you would die for....I would die for You. ~ Mercy Me | |
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6:39 PM Jul 10