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14 November, 09:31

Which radioisotopes have the same decay mode and have half-lives greater than

hour?

(1) Au-198 and N-16 (3) 1-131 and P-32

(2) Ca-37 and Fe-53 (4) Tc-99 and U-233

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  1. 14 November, 09:48
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    The answer is (3) I-131 and P-32. They both have β - decay mode and with half-lives greater than hour. You can get these half-lives and decay mode from table N selected radioisotopes.
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