Molybdenum

WebElements: Niobium WebElements: Niobium- Extensive information on history, uses, occurrence, compounds, and properties of the element. Wikipedia: Niobium Wikipedia: Niobium- Properties of the element, including its history, applications, and characteristics. Lenntech: Niobium Lenntech: Niobium- Physical data, chemical properties, and health effects. EnvironmentalChemistry.com: Niobium EnvironmentalChemistry.com: Niobium- Atomic structure, chemical and physical properties, and table of nuclides. USGS Minerals Information: Niobium USGS Minerals Information: Niobium- Statistics and information on the worldwide supply, demand, and flow of the element (PDF format). ChemicalElements.com: Niobium ChemicalElements.com: Niobium- Basic information, atomic structure, and isotopes. It's Elemental: Niobium It's Elemental: Niobium- Basic physical and historical information.