Radon is a noble gas. It is not to be confused with radium, an alkali earth metal. The atomic weight of Radon-222, the most common isotope, is 222.0175777.
Radon is a radioactive gas which comes from the natural decay of uranium in the ground. The EPA claims that it is a health hazard and causes cancer in people and animals exposed to it, though many conservative commentators and some industrial hygienists[1] state that the dangers are significantly exaggerated.
References
| Periodic Table of the Elements | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | |||||||
86
Rn 222 | ||||||||||||||||||||||||
| *Lanthanides | ||||||||||||||||||||||||
| **Actinides | ||||||||||||||||||||||||