Radon-222 is a colorless, odorless, and tasteless radioactive gas that occurs naturally as a decay product of uranium. It is part of the noble gas family and is found in soil, rock, and groundwater. Due to its radioactive properties, it can pose health risks, particularly when accumulated in enclosed spaces like homes. When inhaled, Radon-222 can damage lung tissue and increase the risk of lung cancer over time. Testing for radon levels in homes is important for safety, as it can vary significantly depending on geographic location and building materials. Proper ventilation and mitigation techniques can help reduce exposure.