Describe safety precautions for handling radioactive sources, including reducing time, increasing distance and using shielding.

Within Radioactive contamination, this learning objective asks you to describe safety precautions for handling radioactive sources, including reducing time, increasing distance and using shielding. Focus on the approved ideas shielding, distance and connect them clearly to Atoms and nuclear radiation. A strong response should state the relevant particle, radiation, isotope, decay, half-life or nuclear-equation idea, then explain how it answers the exact command word. Avoid swapping nearby concepts such as atomic number and mass number, isotope and ion, alpha, beta and gamma radiation, or contamination and irradiation.