Question

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D Question 18 10 pts 14. Polonium (Po) has three radioactive isotopes that are part of the decay pathway for Uranium-238 (238U), shown below. These three isotopes (2upo, 214Po, and 210Po) all decay via an alpha emmision reaction (essentially shedding a Helium atom nucleus from their own nuclei), resulting in the loss of 4 amu (e.g. 118Po à 214Pb). The rate law constants for the decay of these three Po isotopes are: 218Po214Pb 214Po .. > 210Pb 210P0..>206Pb Kdc- 3.79x10 sec kde-4.62x103 sec-1 kdec-5.73x108 sec-1 45 x 10 years Uranium-238 24 5 days 1.14 minutes a Alpha radiation 233 x 10' yearsa um 234 ß Beta radiation 8.3 x 10 years 150 years a 383 days Raon-222 20.mewte.. β Lea.21. Lead 214 Half-life 19 7 minutes Bismuth 214 Stable Lead-200

Answer 1

21 ace, 3:04 minute 21 ln 2 210 In 2 ay