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There Are Three Radioactive Series: the Thorium Series, Which Begins

Question 77

Multiple Choice

There are three radioactive series: the thorium series, which begins with 232Th, the uranium series which starts with 238U and the actinium series which starts with what isotope?


A) 235U
B) 216Po
C) 221Rn
D) 214Pb
E) 226Ra

Correct Answer:

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