Tantalum
Links
Visual Elements: Tantalum
http://www.chemsoc.org/viselements/pages/tantalum.html
Discovery, uses, physical information, and key isotopes.
It's Elemental: Tantalum
http://education.jlab.org/itselemental/ele073.html
Basic physical and historical information.
ChemicalElements.com: Tantalum
http://www.chemicalelements.com/elements/ta.html
Basic information, atomic structure, and isotopes.
Tantalum
http://www.scescape.net/~woods/elements/tantalum.html
Data tables and historic information.
EnvironmentalChemistry.com: Tantalum
http://environmentalchemistry.com/yogi/periodic/Ta.html
Atomic structure, chemical and physical properties, and table of nuclides.
WebElements: Tantalum
http://www.webelements.com/webelements/elements/text/Ta/key.html
Extensive information on history, uses, occurrence, compounds, and properties.
Wikipedia: Tantalum
http://www.wikipedia.org/wiki/Tantalum
Properties of the element, including its history, applications, and charateristics.
Lenntech: Tantalum
http://www.lenntech.com/Periodic-chart-elements/Ta-en.htm
Physical data, chemical properties, health and environmental effects.