juli19818 juli19818

21-04-2020
Chemistry

contestada

a sample of a radioactive isotope initially contains 20 x 10^10 atoms. After 16 days, 5 x 10^10 atoms remain. what is the half-life of the isotope?

A)12 days
B)20 days
C)10 days
D)16 days
E)8 days

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acampbell2007 acampbell2007

21-04-2020

I think the answer is A but I could be wrong

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