Potassium argon method radiometric dating
It is impossible to distinguish between them experimentally.So, how do we work out how much excess argon we have? In this case the method is again salvaged by changing his assumptions about the past.
The discovery of by the French physicist, Henri Becquerel, in 1896 paved the way of measuring absolute time.
When Rutherford announced his findings it soon became clear that Earth is millions of years old.
These scientists and many more after them discovered that atoms of uranium, radium and several other radioactive materials are unstable and disintegrate spontaneously and consistently forming atoms of different elements and emitting radiation, a form of energy in the process.
The original atom is referred to as the parent and the following decay products are referred to as the daughter.
For example: after the it forms a component of all organic compounds and is therefore fundamental to life. Libby of the University of Chicago predicted the existence of carbon-14 before it was actually detected and formulated a hypothesis that radiocarbon might exist in living matter.