Radioactive dating stuff works
Radiometric dating is sometimes referred to as radioactive dating.
The geological time scale and an age for the Earth of 4.5 b.y.
Radiometric dating works by determining the ratio of the number of isotopes of an element and the number of isotopes the element it turns into over time.
Since the rate at which certain elements decay and turn into different elements is understood, scientists are able to calculate the age of substances.
This decay is an example of an exponential decay, shown in the figure below.
Knowing about half-lives is important because it enables you to determine when a sample of radioactive material is safe to handle.