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6. Iridium is a radioactive elementused fortherapy in nucle armedicine. It decaysto% or 24, of its original mass after 74 days. After 148 days, it decaysto %, or 2?, of its original mass. a) What fraction remains after 222 days? write fraction as apowerof 2 with a negative exponentalso. bị What fraction remains after 370 days? Write fraction as apower of 2 with a negative exponent also.

6. Iridium is a radioactive elementused fortherapy in nucle armedicine. It decaysto% or 24, of its original mass after 74 days. After 148 days, it decaysto %, or 2?, of its original mass. a) What fraction remains after 222 days? write fraction as apowerof 2 with a negative exponentalso. bị What fraction remains after 370 days? Write fraction as apower of 2 with a negative exponent also.

Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter18: Nuclear Reactions
Section: Chapter Questions
Problem 56QAP
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6. Iridium is a radioactive elementused fortherapy in nucle arme dicine. It decaysto% or 21, of its original mass after 74 days. After148 days, it de caysto %, or 2:2, of its original mass. a) what fraction remains after 222 days? Write fraction as a powerof 2 with a ne gative exponentalso. b) What fraction remains after 370 days? Write fraction as a powerof 2 with a ne gative exponentalso.
Transcribed Image Text:6. Iridium is a radioactive elementused fortherapy in nucle arme dicine. It decaysto% or 21, of its original mass after 74 days. After148 days, it de caysto %, or 2:2, of its original mass. a) what fraction remains after 222 days? Write fraction as a powerof 2 with a ne gative exponentalso. b) What fraction remains after 370 days? Write fraction as a powerof 2 with a ne gative exponentalso.
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