Isotopes are elements with same atomic number Z= number of protons but different mass number A, where A= Z+N, N= number of neutrons which is variable. As for radioisotopes, I’ve never heard of them before !
Answer:
The third option is correct.
Hope this helps.
Glucagon - stored in the pancreas
Answer:
i really want to help, but i am not able to go to your profile. let me try again