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

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The isotope 1321 decays by ß- emission into stable 132 Xe with a
half-life of 2.3 h.
(a) How long will it take for of the original 132 I atoms to
decay?
(b) How long it will take for a sample of 132 I to lose 95% of its
activity?
1012
of 14℃ in
Transcribed Image Text:The isotope 1321 decays by ß- emission into stable 132 Xe with a half-life of 2.3 h. (a) How long will it take for of the original 132 I atoms to decay? (b) How long it will take for a sample of 132 I to lose 95% of its activity? 1012 of 14℃ in
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