Wectar - Science - Chemistry - Elements - Helium

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	It's Elemental: Helium URL: http://education.jlab.org/itselemental/ele002.html ODP description: Basic physical and historical information. Page title: It's Elemental - The Element Helium Page description: The Element Helium - Basic Physical and Historical Information
	WebElements: Helium URL: http://www.webelements.com/webelements/elements/text/He/key.html ODP description: Extensive information on history, uses, occurrence, and properties of the element. Page title: Chemistry : Periodic Table : helium : key information
	Corrosionsource.com: Helium URL: http://www.corrosionsource.com/handbook/periodic/2.htm ODP description: History, sources, properties, isotopes, and uses. Page title: Helium
	LANL: Helium URL: http://periodic.lanl.gov/elements/2.html ODP description: History, sources, properties, and uses. Page title: Helium
	Wikipedia: Helium URL: http://en.wikipedia.org/wiki/Helium ODP description: Properties of the element, including its history, applications, and characteristics. Page title: Helium - Wikipedia, the free encyclopedia
	ChemicalElements.com: Helium URL: http://www.chemicalelements.com/elements/he.html ODP description: Basic information, atomic structure, and table of isotopes. Page title: Chemical Elements.com - Helium (He)
	EspeciÃ¡l Gas Inc.: Helium URL: http://www.c-f-c.com/specgas_products/helium.htm ODP description: Numeric data, uses, and general information. Page title: Helium - Electronic, Research and other specialty grades. Properties, Purity and Packaging, Helium - He - Helium is a colorless, odorless and tasteless gas. It is present in dry air in a concentration of 5.24 ppm by volume. Used extensively in the welding Page description: Helium - He - Helium is a colorless, odorless and tasteless gas. It is present in dry air in a concentration of 5.24 ppm by volume. Used extensively in the welding industry as an inert sheilding gas in arc welding. Used as a leak detector and as a carrier in gas chromotography.
	EnvironmentalChemistry.com: Helium URL: http://environmentalchemistry.com/yogi/periodic/He.html ODP description: Atomic structure, chemical and physical properties, and table of nuclides. Page title: Periodic Table of Elements: Helium â He (EnvironmentalChemistry.com)
	Visual Elements: Helium URL: http://www.chemsoc.org/viselements/pages/helium.html ODP description: Image, animation, discovery, uses, physical information, and key isotopes. Page title: Visual Elements - Helium
	ChemGlobe: Helium URL: http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/2.html ODP description: Electronic, thermal, and steric data along with basic information. Page title: Helium [He] [2] - Chemical element datasheet - Periodic Table of the Elements - ChemGlobe
	USGS Minerals Information: Helium URL: http://minerals.usgs.gov/minerals/pubs/commodity/helium/ ODP description: Statistics and information on the worldwide supply, demand, and flow of the element (PDF format). Page description: Statistics and information on the worldwide supply, demand, and flow of helium
	Lenntech: Helium URL: http://www.lenntech.com/Periodic-chart-elements/He-en.htm ODP description: Physical data, chemical properties, and health effects. Page title: Helium (He) - Chemical properties, Health and Environmental effects Page description: chemical properties, health and environmental effects of helium