ChemicalElements.com: Molybdenum - Basic information, atomic structure, and table of isotopes. It's Elemental: Molybdenum - Basic physical and historical information. USGS Minerals Information: Molybdenum - Statistics and information on the worldwide supply, demand, and flow of the element (PDF format). EnvironmentalChemistry.com: Molybdenum - Atomic structure, chemical and physical properties, and table of nuclides. Lenntech: Molybdenum - Physical data, chemical properties, health and environmental effects. Wikipedia: Molybdenum - Properties of the element, including its history, applications, and characteristics. Radiochemistry of Molybdenum - Full text of the monograph by E. M. Scadden (U.S. Naval Radiological Defense Laboratory, San Francisco, California). WebElements: Molybdenum - Extensive information on history, uses, occurrence, compounds, and properties.