What is the process of Uranium decay to Radon called?

The process of uranium decay to radon is referred to as "chain decay," which is more accurately termed a decay series or decay chain. In this natural radioactive decay process, uranium-238, for example, goes through a series of alpha and beta decays, ultimately transforming into radon gas (specifically radon-222) among other decay products. The term "chain" emphasizes the sequence of multiple decay steps, each leading to different intermediate isotopes, culminating in the production of radon.

Chain decay is distinct from other types of decay such as alpha and beta decay, which describe specific mechanisms of radioactive decay. Alpha decay involves the emission of an alpha particle, while beta decay involves the transformation of a neutron into a proton or vice versa, emitting a beta particle. Radionuclide decay is a broader term that encompasses all types of radioactive decay of isotopes, but it does not specifically denote the sequential process that leads from uranium to radon. Thus, "chain decay" effectively highlights the interconnected series of transformations from uranium to radon along with its various intermediate products.