Iodine-131 undergoes beta emission with a half-life of 8.02 days.If you start with 44.3 mg of the material,how long will it take for the amount of iodine-131 to drop to 15.3 mg?

Question

Quizplus · Accepted Answer

This is a half-life problem, where we need to find the time it takes for a certain amount of the radioactive substance to decay.

Using the half-life of iodine-131 and the initial amount, we can set up the following equation:

44.3 mg * (1/2)^(t/8.02) = 15.3 mg

Solving for t, we get:

t = 12.3 days

Therefore, the answer is B.

Iodine-131 Undergoes Beta Emission with a Half-Life of 8