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The naturally occurring isotope K40 is widely spread in the environment. In fact, the average concentration...

The naturally occurring isotope K40 is widely spread in the environment. In fact, the average concentration of potassium in the crustal rocks is 27 g/kg and in the oceans is 380 mg/liter. K40 occurs in plants and animals, has a half-life of 1.3 billion years and a natural abundance of 0.0119 percent.

Potassium's concentration in humans is 1.7 g/kg. In urine, potassium's concentration is 1.5 g/liter.

(You can skip i. I just need to know how to do ii, iii, iv. please) Thank you!

i) Calculate the specific activity of K40 in Becquerels per gram of K40.

ii) Calculate the specific activity of K40 in Becquerels per gram of K.

iii) Calculate the specific activity of K40 in urine in Bq/Liter

iv.) A beta activity above 200 transformations (disintegrations) per minute per liter of urine following exposure to fission products is indicative of an internal deposition. How does this "body burden" criterion compare to the activity caused by the one due to the naturally occurring potassium?

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genius_generous answered 1 year ago
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