Radium-226 decays into which gas?

Radium-226 is a radioactive isotope that undergoes alpha decay, and one of its primary decay products is Radon-222. This process is significant in the context of radon mitigation, as Radon-222 is a colorless, odorless gas that can accumulate in buildings, particularly in lower levels such as basements. The decay of Radium-226 to Radon-222 highlights the importance of understanding the decay series of radium, which can contribute to environmental health risks due to radon exposure.

Radon-222 continues to decay through a series of transformations, eventually leading to stable lead isotopes. The understanding of Radium-226 transforming into Radon-222 is crucial for radon mitigation specialists as they develop strategies to manage radon levels in residential and commercial buildings, ensuring the safety and health of occupants.

The other isotopes listed do not directly result from the decay of Radium-226, which makes them incorrect choices in this context. Understanding this decay process and its implications allows specialists to better assess and mitigate potential radon hazards.