A sample contains 1.000 $\times$ 10^-3 g of ⁴⁰K.The half-life of ⁴⁰K is 1.250 $\times$ 10⁹ years.What is the activity of the sample?

Name: A sample contains 1.000 $\times$ 10 -3 g of 40 K.The half-life of 40 K is 1.250 $\times$ 10 9 years.What is the activity of the sample?
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The Answer of A sample contains 1.000 $\times$ 10^-3 g of ⁴⁰K.The half-life of ⁴⁰K is 1.250 $\times$ 10⁹ years.What is the activity of the sample?

A Sample Contains 1 ×\times× 10-3 G of 40K ×\times× 109 Years

A Sample Contains 1 $\times$ 10^-3 G of ⁴⁰K $\times$ 10⁹ Years