The half-life period of a radioactive element is 100 seconds. How much time will it take for 90 % decay? please answer sincerely (the answer is 332.3, I need the method)
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Each radioactive material has a decay rate. The time that it takes for half of the radioactive atoms to decay is called a half-life. For example, the previously mentioned technetium-99m has a half-life of six hours which means that, starting with 100 percent, after six hours, we will have 50 percent left.
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