Assignment:
Question 1. A source has a half-life of 12 hours and an initial activity of 10mCi. After 4 days what is its activity?
Question 2. Calculate the % of activity remaining in a source after 10 half lives.
Question 3.
a. A radionuclide decays 1% in one day. Calculate the half life.
b. A radionuclide decays 70% in one day. Calculate the half life.
Question 4. A sample of 10.0 mCi of radioisotope decays 1.2 % in a single day
a. What is the activity after one day?
b After 30 days?
Question 5. A sample of Cs- 137 initially contains 1000 atoms. How many Cs- 137 atoms does the sample contain after 2 years?