Open Directory - Science: Chemistry: Elements: Noble Gases

Chem4Kids.com: Inert Gases - Overview of the group aimed at children.
Visual Elements: The Noble Gases - Overview, general properties, and chemical data for the group.

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Last update: Thursday, March 24, 2005 1:07:17 AM EST - edit

Open Directory - Science: Chemistry: Elements: Helium

See also:

ChemicalElements.com: Helium - Basic information, atomic structure, and table of isotopes.
Corrosionsource.com: Helium - History, sources, properties, isotopes, and uses.
EnvironmentalChemistry.com: Helium - Atomic structure, chemical and physical properties, and table of nuclides.
Especiál Gas Inc.: Helium - Numeric data, uses, and general information.
It's Elemental: Helium - Basic physical and historical information.
Lenntech: Helium - Physical data, chemical properties, and health effects.
USGS Minerals Information: Helium - Statistics and information on the worldwide supply, demand, and flow of the element (PDF format).
Visual Elements: Helium - Image, animation, discovery, uses, physical information, and key isotopes.
WebElements: Helium - Extensive information on history, uses, occurrence, and properties of the element.
Wikipedia: Helium - Properties of the element, including its history, applications, and characteristics.

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Last update: Wednesday, January 13, 2010 12:59:12 PM EST - edit