Answer
See explanation below.
Work Step by Step
The reactions are:
237 Np 93 --> 4 He 2 + 233 Pa 91
233 Pa 91 --> 0 b -1 + 233 U 92
233 U 92 --> 4 He 2 + 229 Th 90
229 Th 90 --> 4 He 2 + 225 Ra 88
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