Which of the following series of radioactive decays would convert Pa-234 to Ra-226?
A) beta, alpha, beta
B) alpha, alpha
C) beta, alpha, alpha, beta
D) beta, alpha, alpha
E) alpha, beta, gamma

Question

Quizplus · Accepted Answer

Pa-234 undergoes beta decay to form U-234, which then undergoes alpha decay to form Th-230. Th-230 then undergoes beta decay to form Ra-230, which finally undergoes alpha decay to form Ra-226. Therefore, the series of decays required to convert Pa-234 to Ra-226 is beta, alpha, alpha. Option D) correctly represents beta, alpha, alpha.

Which of the Following Series of Radioactive Decays Would Convert