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    Radioactivity; Activity and Half-life

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    3. The half-life of iodine-131, an isotope used in the treatment of thyroid disorders, is 8.04 d.

    (a) If a sample of iodine-131 contains 5.0 1016 nuclei, what is the activity of the sample? Express your answer in curies.
    (b) If the half-life of iodine-131 were only one-fifth of its actual value, calculate the factor by which the activity of this sample would change.

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    3. The half-life of iodine-131, an isotope used in the treatment of thyroid disorders, is 8.04 d.
    (a) If a sample of iodine-131 contains 5.0 1016 nuclei, what is the activity of the sample? Express your answer in curies.
    (b) If the half-life of iodine-131 were only one-fifth of its actual value, calculate the factor by which the activity of this sample would change.
    For part A, I tried using the relationship T1/2 = ln2/λ and R = N0λ, but still couldn't ...

    Solution Summary

    The expert examines activity in Curie of a sample is calculated. The relation between activity and half-line is determined.

    $2.49

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