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 people have asked about this topic.
Click the question to read the answer!
Ask your own question about this topic.
See a Full List of Topics
© 1999-2012 BrainPOP. All rights reserved.
Your use of the site indicates your agreement to be
bound by our
Terms of Use
and
Privacy Policy
.