Multiple Choice
There are three radioactive series: the thorium series,which begins with 232Th,the actinium series which starts with 235U and the uranium series which starts with what isotope?
A) (223Fr)
B) (238U)
C) (221Rn)
D) (214Pb)
E) (232Th)
Correct Answer:

Verified
Correct Answer:
Verified
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