Absolute dating isotopes
Absolute age dating is like saying you are 15 years old and your grandfather is 77 years old.It might take a millisecond, or it might take a century. But if you have a large enough sample, a pattern begins to emerge.It takes a certain amount of time for half the atoms in a sample to decay.This has to do with figuring out the age of ancient things.
If you could watch a single atom of a radioactive isotope, U-238, for example, you wouldn’t be able to predict when that particular atom might decay.
It can’t be used to determine the age of a moon rock or a meteorite.