zacharyveal5 zacharyveal5
  • 16-03-2022
  • Chemistry
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A sample contains 200 grams of a radioactive isotope who's half-life is 700 years. How much is left after 2,100 years?

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13riz 13riz
  • 16-03-2022
Answer: 25g

Explication:

Sample= 200g
t 1/2= 700 years
t= 2100 years


200g—> 100g—>50g—>25g
0y—> 700 y–> 1400 y—> 2100y
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