Question

What differs between a radioactive isotope and a stable isotope?

Answer 1

B. Radioactive isotopes last for less time, is the one among the following choices given in the question that shows the way a radioactive isotope and a stable isotope differs. It last for less time because it is not stable.

Answer 2

B. "Radioactive isotopes last for less time" I believe. 



Hope this helped ^^;