Helium

Radiochemistry of Iridium Radiochemistry of Iridium- Full text of the monograph by G. W. Leddicotte (Oak Ridge National Laboratory, Oak Ridge, Tennessee). Wikipedia: Iridium Wikipedia: Iridium- Properties of the element, including its history, applications, and characteristics. Lenntech: Iridium Lenntech: Iridium- Physical data, chemical properties, health and environmental effects. EnvironmentalChemistry.com: Iridium EnvironmentalChemistry.com: Iridium- Atomic structure, chemical and physical properties, and table of nuclides. It's Elemental: Iridium It's Elemental: Iridium- Basic physical and historical information. ChemicalElements.com: Iridium ChemicalElements.com: Iridium- Basic information, atomic structure, and table of isotopes. Matador Records: Helium Matador Records: Helium- Includes biography, picture gallery, discography, and links.