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Half - Life Calculations

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10 questions

  • 1. Open Ended
    30 seconds
    1 pt
    The half-life of radon-222 is 3.8 days. How much of a 100. g sample is left after 15.2 days?
  • 2. Open Ended
    30 seconds
    1 pt
    Carbon-14 has a half-life of 5,715 years. If a sample contains 70 mg originally, how much is left after 17,190 years?
  • 3. Open Ended
    30 seconds
    1 pt
    How much of a 500. g sample of potassium-42 is left after 62 hours? The half-life of potassium-42 is 12.4 hours.
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