Technetium-99 is a radioactive isotope with a half-life of


Technetium-99 is a radioactive isotope with a half-life of 6 hours that is used in bone scans and other medical tests, decaying by gamma-ray emission. A hospital technician prepares a sample of technetium-99 12 hours before its use.

  • What fraction remains radioactive when used?
  • What fraction remains in the patient's body after 24 hours?

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Physics: Technetium-99 is a radioactive isotope with a half-life of
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