They need to be active long enough to treat the condition, but they should also have a short enough half-life so that they don’t injure healthy cells and organs.
Scientists know the half-life of C-14 (5,730 years), so they can figure out how long ago the organism died.
Carbon-14 dating can only be used to determine the age of something that was once alive.
Scientists look at half-life decay rates of radioactive isotopes to estimate when a particular atom might decay.
A useful application of half-lives is radioactive dating.
It can’t be used to determine the age of a moon rock or a meteorite.
For nonliving substances, scientists use other isotopes, such as potassium-40.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.Some in the lifestyle don't believe the word 'dating' even applies and laugh at the idea.Many see engaging in the lifestyle as it centers only around the kink aspects of it.It might take a millisecond, or it might take a century. But if you have a large enough sample, a pattern begins to emerge.