Question

① if the half-life of 100.0 grams
of a a radioactive
isotope is 8 years, how
many
gram will remain
in 32 years?​

Answer 1

Answer:

6.25g

Step-by-step explanation:

There is no need to solve for the radioactive decay equation. If 32 ÷ 8 = 4, then the material will go through 4 half-lives.

$100.0g ---(1st half cycle)---> 50.0g ---(2nd half cycle)---> 25.0g ---(3rd half cycle)---> 12.5g ---(4th half cycle)---> 6.25g$