Question

25 3 1 point How many half-lives will occur in 40 years? Type your answer... w much of a 100 gram sample is left after 12.2 days? M 3:16

Answer 1

If the half.live of the isotope is 10 years means taht every 10 years the isotope will become half of the previous amount there was at the previous half-life.

To find how many half-lives happen in 40 years, divide the time into the half-live

$\frac{40}{10}=4$

It will occur 4 half-lives.