Evaluate radiation risk using radiation type, source location, activity and half-life.

Within Radioactive contamination, this learning objective asks you to evaluate radiation risk using radiation type, source location, activity and half-life. Focus on the approved ideas evaluate, radiation, risk, type, source 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.