It's Elemental: Iodine - Basic physical and historical information. ChemicalElements.com: Iodine - Basic information, atomic structure, and table of isotopes. USGS Minerals Information: Iodine - Statistics and information on the worldwide supply, demand, and flow of the element (PDF format). EnvironmentalChemistry.com: Iodine - Atomic structure, chemical and physical properties, and table of nuclides. Lenntech: Iodine - Physical data, chemical properties, health and environmental effects. Wikipedia: Iodine - Properties of the element, including its history, applications, and characteristics. Radiochemistry of Iodine - Full text of the monograph by Jacob Kleinberg (University of California, Los Alamos Scientific Laboratory, Los Alamos, New Mexico and University of Kansas, Lawrence, Kansas). WebElements: Iodine - Extensive information on history, uses, occurrence, compounds, and properties.