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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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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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