Question :-
The half life of radon is 3.8 days. Calcula
how much of 15 milligram of Radon will
remain ofter 38 days.
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Answer:
38 days = 38/3.8 = 10 half lifes
∴ the amount left will be 15/2¹⁰ milligram
= 1.46 × 10⁻² milligram
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