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Solve the all parts of following problem given below:

Problem: Huge amounts of radioactive 131/53 I were released in the accident at Chernobyl in 1986. Chemically, iodine goes to the human thyroid. (Doctors can use it for diagnosis and treatment of thyroid problems.) In a normal thyroid, 131/53I absorption can cause damage to the thyroid.

Part I: Write down the reaction for the beta decay of 131/53I.

Part II: Its half-life is 8.0 d; how long would it take for ingested 13153I to become 9.5% of the initial value?

Part III: Absorbing 1 mCi of 13153I can be harmful; what mass of iodine is this?

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