With uranium-lead dating, for example, the process assumes the original proportion of uranium in the sample.One assumption that can be made is that all the lead in the sample was once uranium, but if there was lead there to start with, this assumption is not valid, and any date based on that assumption will be incorrect (too old).Many accept radiometric dating methods as proof that the earth is millions of years old, in contrast to the biblical timeline.Mike Riddle exposes the unbiblical assumptions used in these calculations The primary dating method scientists use for determining the age of the earth is radioisotope dating.A particular isotope of a particular element is called a nuclide. That is, at some point in time, an atom of such a nuclide will spontaneously transform into a different nuclide.Radiometric dating or radioactive dating is a technique used to date materials such as rocks or carbon, in which trace radioactive impurities were selectively incorporated when they were formed.Different methods of radiometric dating vary in the timescale over which they are accurate and the materials to which they can be applied.Additionally, elements may exist in different isotopes, with each isotope of an element differing in the number of neutrons in the nucleus.
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.
In the case of carbon dating, it is not the initial quantity that is important, but the initial ratio of C, but the same principle otherwise applies.
Recognizing this problem, scientists try to focus on rocks that do not contain the decay product originally.
Because radiometric dating fails to satisfy standards of testability and falsifiability, claims based on radiometric dating may fail to qualify under the Daubert standard for court-admissible scientific evidence.
It is more accurate for shorter time periods (e.g., hundreds of years) during which control variables are less likely to change.