Science: Chemistry: Elements: Actinium
Data tables and historic information.
Electronic, thermal, and steric data along with an isotope table.
Basic information, atomic structure, and isotopes.
Atomic structure, properties, and table of nuclides.
It's Elemental: Actinium
Basic physical and historical information.
Basic information and history.
Physical data, chemical properties, health and environmental effects.
Visual Elements: Actinium
Image, sources, biological role, key isotopes, and oxidation states.
Extensive information on history, uses, occurrence, compounds, and properties.
Details the properties of the element, including its history, applications, and charateristics.
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