SOLUTION: Bismuth-210 is an isotope that radioactively decays by about 13% each day, meaning 13% of the remaining Bismuth-210 transforms into another atom (polonium-210 in this case) each da

Question 1196757: Bismuth-210 is an isotope that radioactively decays by about 13% each day, meaning 13% of the remaining Bismuth-210 transforms into another atom (polonium-210 in this case) each day. If you begin with 228 mg of Bismuth-210, how much remains after 7 days?
After 7 days,
mg of Bismouth-210 remains.
Answer by ikleyn(52785) (Show Source): You can put this solution on YOUR website!
.


Since 13% of Bismuth-210 decay each day,  100%-13% = 87% remains.


After 7 days, the remaining amount of Bismuth-210 is

     = 86.014 mg.    ANSWER

Solved.

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