Question: By what processes do these transformations occur? (a) 230 Th to 226 Ra (b) 137 Cs to 137 Ba (c) 38 K to 38 Ar

By what processes do these transformations occur?
(a) 230Th to 226Ra
(b) 137Cs to 137Ba
(c) 38K to 38Ar
(d) 97Zr to 97Nb

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