Radioactive radon gas is a decay product of uranium and thorium, which are found naturally in rocks, soil and building materials. Radon is a significant component of background radiation and can accumulate in poorly ventilated indoor environments. In this data set, we investigated the effect of charging a balloon, which was then hung in an enclosed space, on its level of radioactivity. Students will write a hypothesis, graph data, write a conclusion and use provided information to answer questions about radioactivity and radon, experimental design, accuracy, validity and reliability.
Radionuclides have been used routinely in medicine for more than 60 years. Nuclear medicine uses radiation to provide information about the functioning of a person's specific organs to diagnose or treat disease. The radionuclides used in medicine have half-lives ranging from a few minutes to several days in order to minimise the radiation dose the patient receives. For three unknown medical radionuclides, students will graph their decay over time, use the graph to calculate their half-life, and determine the identify and use of each radionuclide using background information provided.