A nuclide undergoes $\alpha$ decay and forms ²³¹Th .What is the nuclide?

Name: A nuclide undergoes $\alpha$ decay and forms 231 Th .What is the nuclide?
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Question

Quizplus · Accepted Answer

In alpha decay, a nucleus loses 2 protons and 2 neutrons (an alpha particle), so the original nuclide must have had 2 more protons and 4 more mass units than the resulting nuclide. Since $^{231}$Th is formed, the original nuclide must have been $^{235}$U.

A Nuclide Undergoes α\alphaα Decay and Forms 231Th

A Nuclide Undergoes $\alpha$ Decay and Forms ²³¹Th