Every stable isotope is non radioactive. That is the definition of "stable." It is possible protons have a half life, but if so it exceeds 6.6 decillion years. Hydrogen and deuterium are stable. Tritium (H3) has a half life of about 12 years.
Iodine is a nonradioactive halogen that occurs as a solid at room temperature and pressure.
hydrogen-1hydrogen-2carbon-12etc.
This phenomenon is not mandatory.
Lead 206 (Pb)
You can use relative dating which is looking at the rocks around it, or you can use radiometric dating, which compares the amount of radioactive element with the amount of nonradioactive element in the rock.
Iodine is a nonradioactive halogen that occurs as a solid at room temperature and pressure.
nonradioactive
hydrogen-1hydrogen-2carbon-12etc.
No, americium is an unstable and radioactive chemical element.
Lead, the isotope Pb 206.
This is impossible.
This phenomenon is not mandatory.
Lead 206 (Pb)
Redioactive element
The ratio of carbon-14 (radioactive) to carbon-12 (nonradioactive) is measured.
This is a radioactive chemical element.
Only the end product of the decay chain of uranium, a non radioactive isotope of lead.