Bac D Bénin
Benin Baccalauréat Série D (Biologie - Géologie)
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A sample of radioactive Iodine-131 (used in medical thyroid therapy) has a half-life of t_{1/2} = 8.0 days. If the initial mass of the sample is m_0 = 80.0 mg, what mass m of Iodine-131 remains undecayed after 24.0 days?
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