Elements Technetium
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Britannica Nobel Prize: Technetium - Overview and basic data.
ChemGlobe: Technetium - Electronic, thermal, and steric data along with an isotope table.
ChemicalElements.com: Technetium - Basic information, atomic structure, and isotopes.
EnvironmentalChemistry.com: Technetium - Atomic structure, chemical and physical properties, and table of nuclides.
It's Elemental: Technetium - Basic physical and historical information.
LANL: Technetium - History, isotopes, properties, and handling.
Lenntech: Technetium - Physical data, chemical properties, and health effects.
Visual Elements: Technetium - Image, general and physical information, source, uses, key isotopes, and ionisation energies.
WebElements: Technetium - Extensive information on history, uses, occurrence, compounds, and properties.
Wikipedia: Technetium - Properties of the element, including its history, applications, and characteristics.
Radiochemistry of Technetium - Full text of the monograph by Edward Anders (Enrico Fermi Institute and Dept. of Chemistry, University of Chicago, Chicago, Illinois). [PDF] (November, 1960) Help build the largest human-edited directory on the web.