- 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.
