How radioactive dating works chemically
The formula for the fraction remaining is one-half raised to the power given by the number of years divided by the half-life in other words raised to a power equal to the number of half-lives.
Or perhaps the date refers to the time when the rock was heated or deformed or altered, or somewhere between two of these. If the points lie on a straight line, this indicates that the data is consistent and probably accurate.
In other cases, particle accelerators bombard a target with energetic particles.
The method compares the abundance of a naturally occurring radioactive isotope within the material to the abundance of its decay products, what's the legal dating age which form at a known constant rate of decay.
If enough neutrons are added to an atom, it becomes unstable and decays.
In an Olympic race, for example, the official starts his stopwatch when the starting gun sounds.