Where does free radical usually end up?

[kenny1999]

Is it true that UV will break bonding of many substances which then in turn give out free radical that attack other bonding to create unstable intermediate? Will those free radical end up as a stable product one day or will they just keep colliding and giving more free radical which will never end?

[chenbeier]

It will endlich up as a stable product. By recombination, transferring ,oxidising or reducing.