# Question #406c5

##### 1 Answer

The half-life of the isotope is 2.5 min.

The number of half-lives

For each half-life, you divide the total amount of the isotope by 2.

Amount remaining = original amount ×

So 15 min = 6.06 half-lives

1 half-life =

The half-life of the isotope is 2.5 min.

The number of half-lives

For each half-life, you divide the total amount of the isotope by 2.

Amount remaining = original amount ×

So 15 min = 6.06 half-lives

1 half-life =