What are the naturally occurring isotopes of radon?

Answer:
There's just the one, and it's 222Rn, or radon-222.

There might be a trace of some of the other isotopes around if there has been a nuclear accident or the like, but it is unlikely that they could be detected unless the accident was huge, had just occurred and you were testing right on top of it.

First answer by ID1081081043. Last edit by Quirkyquantummechanic. Contributor trust: 3699 [recommend contributor recommended]. Question popularity: 2 [recommend question].