5. The isotope 1321 decays by B- emission into stable 132Xe with a half-life of 2.3 h. (a) How long will it take for of the original 132I atoms to decay? (b) How long it will take for a sample of 132I to lose 95% of its activity?

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5. The isotope 1321 decays by B emission into stable 132Xe with a
half-life of 2.3 h.
(a) How long will it take for of the original 132I atoms to
decay?
(b) How long it will take for a sample of 1321 to lose 95% of its
activity?
Transcribed Image Text:5. The isotope 1321 decays by B emission into stable 132Xe with a half-life of 2.3 h. (a) How long will it take for of the original 132I atoms to decay? (b) How long it will take for a sample of 1321 to lose 95% of its activity?
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