A radioactive element (atom) can decay up to a stable isotope.
Yes, lead is a stable element and is not considered radioactive.
Being radioactive, uranium is not a stable element.
The name for the time required for half of a radioactive element to decay into a stable element is called the half-life. It is a constant value unique to each radioactive isotope, and it is used to measure the rate of radioactive decay.
No, americium is an unstable and radioactive chemical element.
Yes, americium is a radioactive metal. This element has no stable isotopes.
Yes. There are no stable isotopes of astatine, they are all radioactive.
All the isotopes of uranium are radioactive and unstable.
If an element is radioactive, it refers to the stability of their atomic nucleus. If that atomic nucleus is not stable, it is considered radioactive.
No, it has only one stable isotope.
Radon is radioactive and is actually a fairly common hazard because of this.
If you had a stable element 115, then by definition there would need to be at least one non-radioactive isotope. Stable elements are those that have at least one nonradioactive isotope. Of course, the other isotopes of the element could all be radioactive.
This is an element (more exactly an isotope) which is not radioactive.