189Os
189Os is an isotope of osmium, a chemical element. Osmium (symbol Os) is a hard, brittle, bluish-white metal that belongs to the platinum group. Its atomic number is 76, meaning it has 76 protons in its nucleus. Isotopes are variants of a chemical element that have the same number of protons but different numbers of neutrons.
The mass number of an isotope indicates the total number of protons and neutrons in its nucleus.
Stable isotopes like 189Os can be used as tracers in scientific research, particularly in geochemistry and