Question: Use the References to access important values if needed for this question. What is the half-life of magnesium-20 if 1.21 seconds are required for the

Use the References to access important values if needed for this question. What is the half-life of magnesium-20 if 1.21 seconds are required for the mass of a sample of magnesium-20 to fall to 24.6 percent of its original value? Since the decomposition is a radioactive decay reaction, it is first order. sec

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