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3 October, 23:46

How long a time t will it take for the 133 54xe to decay so that eventually its activity decreases by a factor of 1024?

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  1. 4 October, 00:14
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    Base on my research the radioactive isotope X-133 has a half-life of 5 days. So base on the given it decreases by a factor of 1024, it represents 10 halvings. To get how long will it take for the 133 54xe to decay, just multiply 5 days with 10 halvings. The answer is 50 days for the 133 54xe to decay.
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