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a) rozpadu α (alfa) toru-227
b) rozpadu β (beta) fransu-223
a) ²²⁷₉₀Th → ⁴₂ α + ²²⁷ ⁻ ⁴ ₉₀₋₂X →²²³₈₈ Ra
b) ²²³₈₇Fr → ⁰₋₁ β + ²²³₈₇₊₁ X → ²²³₈₈ Ra
227..........4....223
....Th------> .α + ..Ra
90...........2.....88
b)
223.........0....223
....Fr------> β + ...Ra
..87.......-1.....88