What is a naturally occurring radioactive gas that is produced from the decay of uranium in rock?

1 Answer
Dec 20, 2017

Radon-222

Explanation:

Below is the uranium series decay chain.

Uranium decays by emitting alpha and beta radiation.

Along the chain Radon-222 is produced - a radioactive gas with a half-life of 3.6 days.

https://en.wikipedia.org/wiki/Decay_chain#Uranium_serieshttps://en.wikipedia.org/wiki/Decay_chain#Uranium_series