107Ag

107Ag is a stable isotope of the chemical element silver (Ag), consisting of 47 protons and 60 neutrons, giving a mass number of 107. It is one of the two stable silver isotopes, the other being 109Ag. In nature, silver contains about 51.8% of 107Ag and 48.2% of 109Ag, with the exact ratio varying slightly by sample.

As a stable nuclide, 107Ag does not decay and occurs naturally in metallic silver and in silver-bearing minerals. The atomic mass of 107Ag is about 106.9051 atomic mass units. The isotope plays a key role in radiometric dating through its relationship with 107Pd, which decays to 107Ag with a half-life of about 6.5 million years. This 107Pd-107Ag system is used as a chronometer in cosmochemistry and meteoritics to study early solar-system events and the timing of metal-silicate segregation in planetary bodies.

Analytically, 107Ag is measured alongside 109Ag in isotope ratio mass spectrometry and related techniques to investigate silver source, transport, and processing in geological and environmental samples. The isotope serves as a tracer in studies of ore genesis and provenance, as well as in tracing nucleosynthetic contributions to the solar system.

Overall, 107Ag is a stable, naturally occurring silver isotope with significant applications in geochronology, cosmochemistry, and analytical chemistry, linked closely to its radiogenic parent 107Pd.