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WebElements: Tantalum - http://www.webelements.com/webelements/elements/text/Ta/key.html
Extensive information on history, uses, occurrence, compounds, and properties. |
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LANL: Tantalum - http://periodic.lanl.gov/elements/73.html
History, production, properties, and uses. |
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ChemicalElements.com: Tantalum - http://www.chemicalelements.com/elements/ta.html
Basic information, atomic structure, and isotopes. |
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Wikipedia: Tantalum - http://en.wikipedia.org/wiki/Tantalum
Properties of the element, including its history, applications, and characteristics. |
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It's Elemental: Tantalum - http://education.jlab.org/itselemental/ele073.html
Basic physical and historical information. |