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Learner Objective Learner will be able to calculate the half-life time for a radioactive isotope

Learner Objective Learner will be able to calculate the half-life time for a radioactive isotope. Lec: Calculating Half-Life.

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Learner Objective Learner will be able to calculate the half-life time for a radioactive isotope

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  1. Learner ObjectiveLearner will be able to calculate the half-life time for a radioactive isotope Lec: Calculating Half-Life

  2. Half-Life: The time it takes for a radioactive isotope total mass to decay by one half. A half-life can be anywhere from fractions of a second to millions of years. Example: U238 has a half-life over 4.5 billion years and Po214 is 0.0000016 second.

  3. The half-life of Ra222 at the end of 0 half life. 100% still radioactive radon.

  4. The half-life of Ra222 at the end of 1st half life. 50% still radioactive radon.

  5. The half-life of Ra222 at the end of 2nd half life. 25% still radioactive radon.

  6. The half-life of Ra222 at the end of 3rd half life. 12.5% still radioactive radon.

  7. The half-life of Ra222 at the end of 4th half life. 6.25% is still radioactive radon.

  8. Calculating the half-life of Ra222. Ra222 has a half-life of 4 days and starting mass of 800g.

  9. 0 half life

  10. 1st half life

  11. 2nd half-life

  12. 3rd half-life

  13. 4th half-life

  14. Bismuth, Bi214 has a half-life of 20 minutes, how much will still be radioactive when it reaches its 4th half-life and when will this occur? The starting radioactive mass is 200g.

  15. 4th half-life

  16. The Last Lecture For This Unit.

  17. Bismuth-210

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