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| DMOZ DIRECTORY |
- ChemGlobe: Barium - Electronic, thermal, and steric data, along with an isotope table.
- ChemicalElements.com: Barium - Basic information, atomic structure, and isotopes.
- EnvironmentalChemistry.com: Barium - Atomic structure, chemical and physical properties, and table of nuclides.
- It's Elemental: Barium - Basic physical and historical information.
- LANL: Barium - History, sources, properties, and uses.
- Lenntech: Barium - Physical data, chemical properties, health and environmental effects.
- Visual Elements: Barium - Image, appearance, source, uses, key isotopes, and ionisation energies.
- WebElements: Barium - Extensive information on history, uses, occurrence, compounds, and properties.
- Wikipedia: Barium - Properties of the element, including its history, applications, and characteristics.
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