Question

K-40 is a naturally occurring radioactive isotope having natural abundance 0.012% of potassium isotopes. How many K-40 atoms do you ingest by drinking one cup of whole milk containing 370 mg K?​

Answer 1

Explanation:

Potassium-40 (40K) is a naturally occurring radioactive isotope of the common element potassium (potassium represents about 2.4% by weight of the earth's crust). The half-life of 40K is 1.248 x 109 years [1]  its origins are primordial. 40K has an atomic percent abundance of 0.0117%.

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Answer 2

$\Large\mathtt\green{ }\huge\underline\mathtt\red{Answer: }$

K-40 is a naturally occurring radioactive isotope having natural abundance 0.012% of potassium isotopes. How many K-40 atoms do you ingest by drinking one cup of whole milk containing 370 mg K?

$6.9× {10}^{17}$

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