a) \({}_{92}^{238}U \to {}_{90}^{234}Th + {}_2^4He\)
b) \({}_{84}^{210}Po \to {}_{82}^{206}Pb + {}_2^4He\)
c) \({}_{58}^{132}Ce \to {}_{57}^{132}La + {}_1^0e + {\nu _e}\)
d) \({}_{54}^{135}Xe \to {}_{55}^{135}Cs + {}_{ - 1}^0e + \overline {{\nu _e}} \)
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