Huge amounts of radioactive 13153I were released in the accident at Chernobyl in 1986. Chemically, iodine goes

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Huge amounts of radioactive 13153I were released in the accident at Chernobyl in 1986. Chemically, iodine goes to the human thyroid. (It can be used for diagnosis and treatment of thyroid problems.) In a normal thyroid, 13153I absorption can cause damage to the thyroid.

(a) Write down the reaction for the decay of 13153I.

(b) Its half-life is 8.0 d; how long would it take for ingested 13153I to become 5.0% of the initial value?

(c) Absorbing 1 mCi of 13153I can be harmful; what mass of iodine is this?

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