Name:

# Radioisotope Quiz

### PS2J-b: I can use a decay curve for a radioactive isotope to determine the age of the sample.

- Using the C-14 decay curve estimate the following. The age of the sample is :
- _________ years when 25% of the C-14 is left.
- _________ years when 5% of the C-14 is left.
- _________ years after one half life.
- _________ years after 3 half-lives.

- Label the x-axis of this radioisotope decay curve for Be-11 which has a half-life of 14 seconds.