What is an isotope?
What is a half-life?
What is a radioactive isotope?
How to scientists use isotopes to figure out how old things are?
What happens when the number of protons and neutrons becomes the same in radioactive materials?
I have heard about the element gallium. Is it radioactive and what exactly is it?
Can the atomic number of an element ever change?
Are body scans safe?
Here are some questions about this topic.
Click the question to read the answer!
Ask another question about this topic!
See a Full List of Topics
© 1999–2014 BrainPOP and related companies. All rights reserved.
BrainPOP is a registered trademark of FWD Media Inc. d/b/a BrainPOP.
For the full list of trademarks referenced on this page, please see
. Your use of the site indicates your agreement to
be bound by our