Iron-59 has a half-life of 44 days.A radioactive sample has an activity of 0.64 mBq.What is the activity of the sample after 88 days?

Question

Quizplus · Accepted Answer

Since the half-life of Iron-59 is 44 days, after 44 days the initial activity of 0.64 mBq will reduce to 0.32 mBq. After another 44 days, the remaining activity will reduce to half of 0.32 mBq, which is 0.16 mBq. Therefore, the activity of the sample after 88 days is 0.16 mBq. Hence, the correct answer is choice C.

Iron-59 Has a Half-Life of 44 Days