Basic information, atomic structure, and table of isotopes.
Atomic structure, chemical and physical properties, and table of nuclides.
Basic physical and historical information.
Full text of the monograph by W. T. Mullins and G. W. Leddicotte (Oak Ridge National Laboratory, Oak Ridge, Tennessee).
Extensive information on history, uses, occurrence, compounds, and properties of the element.
Properties of the element, including its history, applications, and characteristics.
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