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

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Physics

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

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

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

i) Calculate thespecific activity of K40 in Becquerels per gram ofK40.

ii) Calculate thespecific activity of K40 in Becquerels per gram ofK.

iii) Calculate thespecific 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 fissionproducts is indicative of an internal deposition. How does this\"body burden\" criterion compare to the activity caused by the onedue to the naturally occurring potassium?

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