Overview
Radon is a colorless, odorless noble gas produced by the radioactive decay of radium and uranium in soils and rocks.
Properties
It is chemically inert as a noble gas but is radioactive, emitting alpha particles that pose health risks when accumulated in enclosed spaces.
Occurrence and Uses
Radon seeps from the ground into buildings and is a major contributor to natural background radiation; it has limited research uses but is primarily a public health concern.
Isotopes and Safety
Radon 222 is the most relevant isotope for indoor exposure; mitigation focuses on ventilation and sealing foundations to reduce lung cancer risk from long term exposure.