Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
Radon-222 is a radioactive gas that occurs naturally from the decay of uranium in soil, rocks, and water. It can seep into buildings and accumulate to dangerous levels, increasing the risk of lung cancer.
Related terms
Radioactive Decay: The process by which unstable atomic nuclei release radiation over time, leading to the formation of radon-222.
Lung Cancer: Radon-222 is a known carcinogen that increases the risk of developing lung cancer when inhaled over extended periods.
Actions taken to reduce or eliminate radon levels in buildings, such as sealing cracks or installing ventilation systems to prevent its entry and accumulation.