nuclear decay
radionuclide
radioisotope
enrichment
nuclear disintegration
radioactive disintegration
radiooxygen
uranian
radioboron
radioactivating
radiation
helium dating
radioactive
transuranic element
radiocesium
radio-
plutonium
Pu
atomic number 94
radiosamarium
activate
flerovium
Pa
radiochemistry
radiothulium
Fl
diuranium
uraniferous
nuclear chemistry
atomic number 91
protoactinium
radioselenium
protactinium
uranium-238
dirty bomb
radiothorium
pitchblende
Ac
uranide
uranitic
atomic number 84
polonium
radiocadmium
Po
calutron
radioeuropium
actinium
atomic number 89