Radioactive isotopes are used is:
- medicine, for treatment by irradiation
- medicine, for diagnostic
- in science/technology as tracers
- as source of energy
- as source of ionizing radiations
- in many instruments
- determination of rocks age
etc.
Radioactive isotopes are a subset of isotopes. If we look at all isotopes, some of them are radioactive. That means that they have unstable nuclei, and they will decay spontaneously sooner or later.
Not all isotopes are radioactive; the radioactive isotopes are unstable and emit radiations.
Both isotopes and radioactive isotopes are pretty much the same but radioactive isotopes are better because it can be used to make medicine.
Two examples are: carbon-14 and cobalt-60.
Sodium has no radioactive isotopes.
Radioactive isotopes are not stable.
All the uranium isotopes are radioactive.
All radioactive isotopes will disintegrate.
All isotopes of francium are radioactive.
radioactive isotopes! :)
Some examples are deuterium and tritium which are radioactive isotopes of hydrogen.
No, not all radioactive isotopes be used in radiometric dating. Some have very very short half lives and would entirely disappear before any useful period of time passed.