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Basic information, atomic structure, and isotopes.
Atomic structure, properties, and table of nuclides.
It's Elemental: Actinium
Basic physical and historical information.
Physical data, chemical properties, health and environmental effects.
Extensive information on history, uses, occurrence, compounds, and properties.
Details the properties of the element, including its history, applications, and characteristics.
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Last update:November 3, 2012 at 11:24:04 UTC