What is another word for primordial nuclide?
Pronunciation: [pɹɪmˈɔːdɪəl nˈuːkla͡ɪd] (IPA) 
A primordial nuclide refers to an isotope that has existed since the formation of the Earth. These isotopes have long half-lives and are stable in nature. Primordial nuclides are often used in radioactive dating techniques to determine the age of rocks and minerals. Some synonyms for primordial nuclides include ancient isotopes, long-living isotopes, and oldest isotopes. These terms all describe isotopes that have been around since the early formation of the Earth and are still present today in measurable amounts. Other synonyms for primordial nuclides may include stable isotopes, natural isotopes, and unchanging isotopes. Regardless of the terminology used, the study of these isotopes provides important information about the age and evolution of Earth.
