The dosage of technetium-99m for a lung scan is 20. µCi/kg of body mass. How many millicuries of technetium-99m should be given to a 50.0-kg person (1 mCi = 1000 µCi)

Match each property (1 to 3) with its unit of measurement.

1. activity

2. absorbed dose

3. biological damage

a. rad

Two technicians in a nuclear laboratory were accidentally exposed to radiation. If one was exposed to 8 mGy and the other to 5 rad, which technician received more radiation?

Two samples of a radioisotope were spilled in a nuclear laboratory. The activity of one sample was 8 kBq and the other 15 mCi. Which sample produced the higher amount of radiation?

Suppose a person absorbed 50 mrad of alpha radiation. What would be the equivalent dose in millisieverts?

Why are rems the preferred units for measuring the health effects of radiation?

A selenium-75 source is producing 300 rem at a distance of 2.0 m?

b. What is its intensity at 25 m?

If a radiation source has an intensity of 650 rem at 1.0 m, what distance is needed to decrease the intensity of exposure to below 25 rem, the level at which no effects are detectable?

Film badge dosimeters typically include filters to target specific types of radiation. A film badge is constructed that includes a region containing a tin foil filter, a region containing a plastic film filter, and a region with no filter. Which region monitors exposure to α-radiation? Which monitors exposure to β-radiation? Which monitors γ-radiation? Explain.