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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.

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Tree Number(s): D01.268.271.870, D01.268.556.843, D01.268.956.875, D01.496.749.305.870, D01.552.544.843

MeSH Unique ID: D013667

Registry Number: 7440-26-8

Entry Terms:

  • Technetium 99m
  • 99m, Technetium

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