There is a very wide range of half-life for different radioactive isotopes, ranging from the billions of years to very small fractions of a second. So some isotopes disintegrate immediately, and others last a very long time.
radioactive decay
Radioactive disintegration (or decay)
Over 99.999% of argon is not radioactive. A trace of radioactive argon-39 can be found in nature, but it is not significant. Synthetic radioactive isotopes of argon exist, as they do for all elements.
The natural isotopes of nitrogen are stable; for the synthetic radioactive isotopes of nirogen see the link below.
Yes, Rn is radon a radioactive nonmetal. But the symbol Rn does not stand for "radioactive nonmetal." Rn Radon has no stable isotopes, so yes it is always a radioactive nonmetal.
All radioactive isotopes will disintegrate.
Unstable isotopes are radioactive isotopes, can disintegrate and emit radiations.
These isotopes are unstable and disintegrate emitting radiations.
Stable isotopes are chemical isotopes that are not radioactive, meaning that they do not spontaneously undergo radioactive decay.
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.
Sodium has no radioactive isotopes.
Radioactive isotopes are not stable.
All the uranium isotopes are radioactive.
All isotopes of francium are radioactive.
radioactive isotopes! :)
Some examples are deuterium and tritium which are radioactive isotopes of hydrogen.