Plutonium

WebElements: Protactinium WebElements: Protactinium- Extensive information on history, uses, occurrence, compounds, and properties. Radiochemistry of Protactinium Radiochemistry of Protactinium- Full text of the monograph by H. W. Kirby (Mound Laboratory, Miamisburg, Ohio). EnvironmentalChemistry.com: Protactinium EnvironmentalChemistry.com: Protactinium- Atomic structure, chemical and physical properties, and table of nuclides. ChemicalElements.com: Protactinium ChemicalElements.com: Protactinium- Basic information, atomic structure, and isotopes. It's Elemental: Protactinium It's Elemental: Protactinium- Basic physical and historical information.