Both isotopes and radioactive isotopes are pretty much the same but radioactive isotopes are better because it can be used to make medicine.
Not all isotopes are radioactive; the radioactive isotopes are unstable and emit radiations.
Isotopes are atoms of the same element with different numbers of neutrons. Stable isotopes have a balanced number of protons and neutrons, meaning their nuclei do not decay over time. Unstable isotopes, also known as radioactive isotopes, have an imbalance of protons and neutrons, causing their nuclei to decay and emit radiation over time.
Sodium has no radioactive isotopes.
Radioactive isotopes are not stable.
Nitrogen has two stable isotopes: N-14 and N-15 and 14 radioactive isotopes.
That depends on the isotope, as Argon has three different stable isotopes and many different radioactive isotopes.
All the uranium isotopes are radioactive.
All radioactive isotopes will disintegrate.
The same element can have different half-lives, for different isotopes. You can find a list at the Wikipedia article "List of radioactive isotopes by half-life". This list is NOT complete; a complete list would have about 3000 nuclides (that is, isotopes).
All isotopes of francium are radioactive.
radioactive isotopes! :)
Some examples are deuterium and tritium which are radioactive isotopes of hydrogen.