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Author Question: Over the course of 6 hours, 15 of a radioactive material decays. What is its half-life? a. 12.8 hrs ... (Read 78 times)

krzymel

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on: Jul 28, 2018
Over the course of 6 hours, 15 of a radioactive material decays. What is its half-life?
 a. 12.8 hrs
  c. 4.1 hrs
  b. 25.6 hrs
  d. 68.6 hrs

Question 2

Approximately how many half-life periods must elapse if the activity of a radioactive isotope sample is to be reduced to 0.03 of the original value?
 a. 5
  c. 8
  b. 3
  d. 60


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nhea

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Reply #1 on: Jul 28, 2018
Answer to Question 1

B

Answer to Question 2

A


krzymel

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Reply #2 on: Jul 28, 2018
Both answers were spot on, thank you once again


nhea

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Reply #3 on: Jul 28, 2018
Great! Please up vote :D


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