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Primordial noble gases in chondrites: the abundance pattern was established in the solar nebula
Abstract:
Ordinary chondrites, like carbonaceous chondrites, contain primordial noble gases mainly in a minor phase comprising =0.05 percent of the meteorite, probably an iron-chromium sulfide. The neon-20/argon-36 ratios decrease with increasing argon-36 concentration, as expected if the gas pattern was established by condensation from the solar nebula, and was negligibly altered by metamorphism in the meteorite parent bodies. Meteoritic and planetary matter apparently condensed over a substantial range of temperatures.
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Noble Gases
The elements in group 18 are noble gases (helium, neon, argon, krypton, xenon, and radon). They earned the name “noble” because they were assumed to be nonreactive since they have filled valence shells. In 1962, Dr. Neil Bartlett at the University of British Columbia proved this assumption to be false.
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Conditions on Early Earth
Electron Configuration of Multielectron Atoms
The Aufbau Principle and Hund's Rule
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