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tinadarji80 tinadarji80
  • 09-09-2016
  • Chemistry
Answered

radioisotope actinium 225 has half life of 10 days, I begin with 16 kg of this isotope, how much will remain after 40 days?

Verified Answer :

Yipes
Yipes Yipes
  • 09-09-2016

\(N(t)=N_{0}(\frac{1}{2})^\frac{t}{\tau_{_\frac{1}{2}}}}\\\\ N_{0}=16kg\\ t=40days\\ \tau_{_\frac{1}{2}}}=10days\\\\\\ N(t)=16kg*(\frac{1}{2})^{\frac{40}{10}}=16kg*\frac{1}{16}=1kg\)

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