See also:

• Science: Chemistry: Elements: Transition Metals  (3)

ChemGlobe: Tantalum - - Electronic, thermal, and steric data along with an isotope table.

ChemicalElements.com: Tantalum - - Basic information, atomic structure, and isotopes.

EnvironmentalChemistry.com: Tantalum - - Atomic structure, chemical and physical properties, and table of nuclides.

It's Elemental: Tantalum - - Basic physical and historical information.

LANL: Tantalum - - History, production, properties, and uses.

Lenntech: Tantalum - - Physical data, chemical properties, health and environmental effects.

Visual Elements: Tantalum - - Discovery, uses, physical information, and key isotopes.

WebElements: Tantalum - - Extensive information on history, uses, occurrence, compounds, and properties.

Wikipedia: Tantalum - - Properties of the element, including its history, applications, and characteristics.