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Wikipedia: Helium - http://en.wikipedia.org/wiki/Helium
Properties of the element, including its history, applications, and characteristics. |
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USGS Minerals Information: Helium - http://minerals.usgs.gov/minerals/pubs/commodity/helium/
Statistics and information on the worldwide supply, demand, and flow of the element (PDF format). |
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WebElements: Helium - http://www.webelements.com/webelements/elements/text/He/key.html
Extensive information on history, uses, occurrence, and properties of the element. |
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LANL: Helium - http://periodic.lanl.gov/elements/2.html
History, sources, properties, and uses. |
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ChemicalElements.com: Helium - http://www.chemicalelements.com/elements/he.html
Basic information, atomic structure, and table of isotopes. |
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It's Elemental: Helium - http://education.jlab.org/itselemental/ele002.html
Basic physical and historical information. |
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EnvironmentalChemistry.com: Helium - http://environmentalchemistry.com/yogi/periodic/He.html
Atomic structure, chemical and physical properties, and table of nuclides. |
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Visual Elements: Helium - http://www.chemsoc.org/viselements/pages/helium.html
Image, animation, discovery, uses, physical information, and key isotopes. |
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ChemGlobe: Helium - http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/2.html
Electronic, thermal, and steric data along with basic information. |
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Especiál Gas Inc.: Helium - http://www.c-f-c.com/specgas_products/helium.htm
Numeric data, uses, and general information. |