SOLUTION: please help me to solve the problem-In how many years will a given quantity of Iodine 131 lose 80% of its radioactivity? (Note: The half life of Iodine-131 is 8 days)
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Question 1057866: please help me to solve the problem-In how many years will a given quantity of Iodine 131 lose 80% of its radioactivity? (Note: The half life of Iodine-131 is 8 days)
Answer by math_helper(2461) (Show Source): You can put this solution on YOUR website!
Half life = 8 days
Now use the decay formula:
Given N=20% of N_o (80% loss of radioactivity ==> 20% remaining)
—
Ans: In 18.576 days, the Iodine-131 will have lost 80% of its radioactivity.
(18.576 days is equivalent to 0.051 years)
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