[Answered] Over the course of 6 hours, 15 of a radioactive material decays. What is its half-life? a. 12.8 hrs ...

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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 74 times)

krzymel

Hero Member
Posts: 548

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

Sr. Member
Posts: 305

Reply #1 on: Jul 28, 2018

Answer to Question 1

B

Answer to Question 2

A

krzymel

Hero Member
Posts: 548

Reply #2 on: Jul 28, 2018

Both answers were spot on, thank you once again

nhea

Sr. Member
Posts: 305

Reply #3 on: Jul 28, 2018

Great! Please up vote

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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 74 times)

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