What are radioisotopes and nuclear medicine, what are they and how do they work? Oh, and connect the 2 terms.?

I’m in high school and for a chapter, we’re learning about chemistry and our teacher makes us look for our answers by not using word-for-word definitions…and I’m confused.
1. Explain the terms.
2. What are they.
3. How do they work.
4. Connect the 2 terms.
5. Give an example.

9 Recession-Proof Careers & Why They Are Secure

Written by tatarjob and tatarayub Additional reporting by Neena Samuel and Kathryn M. Tyranski
Despite the economic downturn, these careers are still growing.These industries project promise-and jobs-for the future, according to the Bureau of Labor Statistics and the Occupational Information Network database.
1. Education Math and science teachers will be in demand as the U.S. struggles to compete [...]