True or false: If someone is exposed to ionizing radiation, then they are radioactive.

The statement is false because exposure to ionizing radiation does not make a person radioactive. Radioactivity refers to the property of certain materials to emit radiation as a result of unstable atomic nuclei undergoing decay. When a person is exposed to ionizing radiation, they might absorb some of that energy, but it does not alter their atomic structure to the point of making them a source of radiation themselves. Instead, the person remains non-radioactive, with the potential effects of the absorbed radiation depending on various factors such as dose, duration, and the type of radiation involved. Therefore, the correct interpretation conveys the distinction between simply being exposed to radiation and being a radioactive entity.