## Question

###### Ordinary potassium contains 0.012 percent of the naturally occurring radioactive isotope 4OK, which has half-life of 1.3X 109What is the ctivity of 3.6 kg of potassium? 969 ACiWhat would have been the fraction of Ak" in naturat potassium 6.2 X 109 ago?

Ordinary potassium contains 0.012 percent of the naturally occurring radioactive isotope 4OK, which has half-life of 1.3X 109 What is the ctivity of 3.6 kg of potassium? 969 ACi What would have been the fraction of Ak" in naturat potassium 6.2 X 109 ago?

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