half-life

What is carbon isotope analysis? Why is it possible to date the archeology?
According to level 3 knowledge, there are always variations called chemical isotopes. Isotopes will have the same number of protons and electrons but different numbers in
This is the rarest element in the Earth, not yet observed, it has disappeared into nowhere!
The half-life of the Hydro-7 is 0.0000 trillion trillion seconds.
The element has a half-life of 1 billion times the life of the universe
A series of stars have long since disappeared, but the bismuth element will still exist and continue to decay.