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Topic: Exotic helium isotopes

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Helium

Isotope

Alpha decay

Isotope table (divided)

Roentgenium

Bohrium

Plutonium

Boron

Isotope table (complete)

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	Helium - Encyclopedia, History, Geography and Biography
		Helium gas is used to fill the space between lenses in some telescopes because its extremely low index of refraction reduces the distorting effect of temperature variations in the gas filling the telescope (some telescopes use vacuum in the telescope instead).
		Helium was first detected on August 18, 1868 as a bright yellow line with a wavelength of 587.49 nm in the spectrum of the chromosphere of the Sun, by French astronomer Pierre Janssen during a total solar eclipse in Guntur City (India).
		Helium is the second most abundant element in the known Universe after hydrogen and constitutes 23% of all elemental matter measured by mass ('elemental matter' does not include dark matter or dark energy, which together may account for 96% of the Universe).
	www.arikah.net /encyclopedia/Helium (5099 words)

	Helium - Biocrawler (Site not responding. Last check: 2007-10-04)
		Helium is used in cryogenics, in deep-sea breathing systems, to cool superconducting magnets, in helium dating, for inflating balloons, for providing lift in airships and as a protective gas for many industrial uses (such as arc welding and growing silicon wafers).
		Helium was first detected on August 18, 1868 as a bright yellow line with a wavelength of 587.49 nm in the spectrum of the chromosphere of the Sun, by French astronomer Pierre Janssen during a total solar eclipse in India.
		Helium is the second most abundant element in the known Universe after hydrogen and constitutes 23% of all elemental matter measured by mass even though there are 8 times as many hydrogen atoms as helium ('elemental matter' does not include dark matter or dark energy, which together may account for 96% of the Universe).
	www.biocrawler.com /encyclopedia/Helium (4845 words)

	ooBdoo
		Helium (IPA: /ˈhiːliəm/) is a colorless, odorless, tasteless chemical element, one of the nearly inert noble gases of the periodic table.
		Helium is used in cryogenics, as a deep-sea breathing gas, for inflating balloons and airships, and as a protective gas for many industrial purposes, such as arc welding.
		The shortest-lived isotope is helium-5 with a half-life of 7.6×10
	www.oobdoo.com /wikipedia/?title=Helium (4670 words)

	Helium Encyclopedia Article @ Faintest.org (Site not responding. Last check: 2007-10-04)
		Helium brings peer review -- and money -- to everyday advice
		The principal impurity in Grade-A helium is neon.
		Faintest.org is designed and maintained by Kurt Karr and is hosted by pair Networks.
	www.faintest.org /encyclopedia/Helium (4793 words)

	Britain.tv Wikipedia - Helium (Site not responding. Last check: 2007-10-04)
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		Helium II will "creep"?title=along surfaces in order to find its own level - after a short while, the levels in the two containers will equalize.
		After the "Helium Acts Amendments of 1960"?title=(Public Law 86â“777), the U.S. Bureau of Mines arranged for five private plants to recover helium from natural gas.
	www.britain.tv /wikipedia.php?title=Helium (4658 words)

	Helium (Site not responding. Last check: 2007-10-04)
		Because of its low density, Helium is the gas of choice to fill [[airships such as the USGS blimp.]] Pressurized Helium is commercially available and is extracted from natural gas.
		Helium in the crust is produced by the radioactive decay of uranium and thorium which are present in varying concentrations throughout the crust
		*Helium: Fundamental models, Don L. Anderson, G. Foulger and Anders Meibom (viewed 5 Apr 2005)
	helium.iqnaut.net (4744 words)

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