Final answer:
The half-life of Technetium-99m is 6.01 hours. To find out how long it takes for the activity to reduce to 0.100 mCi, you can use the half-life formula.
Step-by-step explanation:
The half-life of Technetium-99m is 6.01 hours. This means that it takes 6.01 hours for half of the initial amount of Technetium-99m to decay. To find out how long it takes for the activity to reduce to 0.100 mCi, you can use the formula:
(initial activity) x (0.5)^(t/half-life) = (final activity)
Plugging in the values, we get:
25 x (0.5)^(t/6.01) = 0.100
Solving this equation will give you the time it takes for the activity to reduce to 0.100 mCi.
As with any other radioactive material, there is an increased chance that cancer or other adverse health effects can result from radiation exposure. The energy is given off as either particles or rays.. The Tc-99m used in medical diagnostics has a short, six-hour half-life and does not remain in the body.