Infinitesimal chance. Better? ;^)
Assuming the chunk of material survived re-entry whole, its chance of hitting land is 18% or so, and the chance of landing in a populated area is even less. To pose a serious threat to its finder (if there is one) who maybe takes it home, it would need to be ingested. Finally, if showcased in a glass jar, that would be enough to block the beta particles. Regular clothing also blocks the radiation.