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3. The half-life of technicium-99 is 6.02 hours. What is the decay constant of technicium-99?

1. Spent fuel rods contain strontium-90 whose half-life is 28.1 years. What is the decay constant of strontium-90?.

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3. The half-life of technicium-99 is 6.02 hours. What is the decay constant of technicium-99?

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  1. 1. Spent fuel rods contain strontium-90 whose half-life is 28.1 years. What is the decay constant of strontium-90?

  2. 2. Spent fuel rods contain strontium-90 whose half-life is 28.1 years. Josh works at a nuclear reactor and must safely store the spent rods. If a spent rod contains 1.00 x 1027 atoms of strontium-90 when stored in a sealed container, how many strontium-90 atoms will remain if the container is excavated by archeologists 1000 years later?

  3. 3. The half-life of technicium-99 is 6.02 hours. What is the decay constant of technicium-99?

  4. 4. The synthetically manufactured radiopharmaceutical technicium-99 is used to produce a scan of Dale’s brain after he suffers a concussion. The half-life of technicium-99 is 6.02 hours. If Dale was given a dose of 1.32 x 106 molecules, how many molecules of technicium-99 remains in Dale’s body 24 hours after the scan?

  5. 5. What fraction of technicium-99 is left after 3 half lives?

  6. 6. Technicium-99 has a half life of 6.02 hours. A sample containing 3.42 x 1012 radioactive atoms sits in a lead case for 5012.1 hours. How many Technicium-99 atoms remain after that amount of time? 

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