Radioactive age dating definition

All ordinary matter is made up of combinations of chemical elements, each with its own atomic number, indicating the number of protons in the atomic nucleus.Elements exist in different isotopes, with each isotope of an element differing in the number of neutrons in the nucleus.

A new, more stable isotope, called the decay or daughter product, takes its place.

Radiometric dating (often called radioactive dating) is a way to find out how old something is.