thorium-228 - radioactive isotope of thorium with mass number 228radiothoriumatomic number 90, thorium, Th - a soft silvery-white tetravalent radioactive metallic element; isotope 232 is used as a power source in nuclear reactors; occurs in thorite and in monazite sands
thorium-228
noun
Synonyms for thorium-228
noun radioactive isotope of thorium with mass number 228