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thorium-228

DEFINITIONS OF: thorium-228

1

n radioactive isotope of thorium with mass number 228

Synonyms:
radiothorium
Type of:
Th, atomic number 90, thorium
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
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