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(a) What isotope is produced from the al...

(a) What isotope is produced from the alph-radioactive `Ra^(226)` as a result of five alpha-disintergrations and four `beta` disintergrations?
(b) How many alpha- and `beta`-decays does `U^(238)` experience before truning finally into the stable `Pb^(206)` isotope?

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The correct Answer is:
`[(a) ._(82)^(206)Pb" "(b) 8 alpha" decays & "6 beta" decays"]`
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