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The half-life of 90Sr is 29.1 years. How long would we need to store it before...

The half-life of 90Sr is 29.1 years. How long would we need to store it before 99% of the initial amount decayed?

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Answer #1

Half life

Rate constant

99% of initial amount is decayed

Time required

Hence, we should store 90Sr for 193 years before 99% of the initial amount decayed.

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