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ChemGlobe: Technetium
Electronic, thermal, and steric data along with an isotope table.
Wikipedia: Technetium
Properties of the element, including its history, applications, and charateristics.
Technetium
Data tables and historic information.
WebElements: Technetium
Extensive information on history, uses, occurrence, compounds, and properties.
LANL: Technetium
History, isotopes, properties, and handling.
Visual Elements: Technetium
Image, general and physical information, source, uses, key isotopes, and ionisation energies.
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