Part A- Phosphorus-32 decays by beta emission to form sulfur-32. Explain how many half-lives have passed in the reaction shown here?
Part B- The half-life of phosphorus-32 is 14.26 days compute its decay constant.
Part C- If you by mistake spill phosphorus-32 onto your shoe explain how long would it take before 99.9% of the radioactive material has decayed thus that you can safely wear the shoes again?