A sample contains 24 g of radioactive isotope. how much radioactive isotope remains in the sample after 2 half-lives?

A. 6 g

B. 1.5 g

C. 12 g

D 3 g

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A sample contains 24 g of radioactive isotope. how much radioactive isotope remains in the sample after 2 half-lives? A. 6 g B. 1.5 g C. 12 g D 3 g