Gold-198, a beta emitter used to treat leukemia, has a half-life of 2.695 days.

Question

Gold-198, a beta emitter used to treat leukemia, has a half-life of 2.695 days. The standard dosage is about 1.0 mCi/kg body weight. What is the product of the beta emission of gold-198? Express your answer as an isotope. How long does it take a 30.0 mCi sample of gold-198 to decay so that only 15.0 mCi remains? Express your answer using three significant figures. How many millicuries are required in a single dosage administered to a 75 kg adult? Express your answer using two significant figures.

Explanation / Answer

Part A : beta-emmission product of Au-198 is,

Hg-198

Part C. 1 kg dose is 1 mCi

So, for 75 kg bdy weight, the dose would be,

75 mCi

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