Exam (elaborations)
Praxis Middle School Science (5442)
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1. A sample contains 8 g 8 gramsof a radioisotope that has a half-life of 10 years. How much time is required for the sample to decay until approximately 1 g one gramof the isotope remains in the sample? 30 years is correct. If the half-life of the substance is 10 years, then every 10 years the amo...
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