Answered: 212 Th 228 8 Rn 5.7 yr 89AC 9Ac 228- 90…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

The steps below show three of the steps in the radioactive
decay chain for 232
90Th. The half-life of each isotope is shown
below the symbol of the isotope. (a) Identify the type of
radioactive decay for each of the steps (i), (ii), and (iii).

(b) Which of the isotopes shown has the highest activity?
(c) Which of the isotopes shown has the lowest activity?
(d) The next step in the decay chain is an alpha emission.
What is the next isotope in the chain?

212 Th
228
8 Rn
5.7 yr
89AC
9Ac
228-
90
228
(i)
(ii)
(iii)
90
1.41 x 10°
yr
6.1 min
1.9 yr

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