Element
technetium Audio
tech·ne·ti·um [ tek-nee-shee-uhm, -shuhm ]
Subclass of:
Elements, Radioactive; Transition Elements; Metals, Heavy
Definitions related to technetium:
  • First artificially produced element; technetium has the atomic symbol Tc, atomic number 43; all technetium isotopes are radioactive; technetium 99m has a half-life of about 6 hours and is used diagnostically as a radioactive imaging agent.
    CRISP Thesaurus
    National Institutes of Health, 2006
  • The first artificially produced element and a radioactive fission product of URANIUM. Technetium has the atomic symbol Tc, and atomic number 43. All technetium isotopes are radioactive. Technetium 99m (m=metastable) which is the decay product of Molybdenum 99, has a half-life of about 6 hours and is used diagnostically as a radioactive imaging agent. Technetium 99 which is a decay product of technetium 99m, has a half-life of 210,000 years.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2021
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