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the entire directory only in Elements/Protactinium Top: Science: Chemistry: Elements: Protactinium  (8) See also: Science: Chemistry: Elements: Actinides  (1) Sites: ChemGlobe: Protactinium - Electronic, thermal, and steric data along with an isotope table. ChemicalElements.com: Protactinium - Basic information, atomic structure, and isotopes. EnvironmentalChemistry.com: Protactinium - Atomic structure, chemical and physical properties, and table of nuclides. It's Elemental: Protactinium - Basic physical and historical information. LANL: Protactinium - Basic information and history. Visual Elements: Protactinium - General and physical information, source, and key isotopes. WebElements: Protactinium - Extensive information on history, uses, occurrence, compounds, and properties. Radiochemistry of Protactinium - Full text of the monograph by H. W. Kirby (Mound Laboratory, Miamisburg, Ohio). [PDF] Last update: 7:58 PT, Wednesday, January 13, 2010 Help build the largest human-edited directory on the web. Submit a Site - Open Directory Project - Become an Editor