Silverness - Isotopes

Isotopes

Naturally occurring silver is composed of two stable isotopes, 107Ag and 109Ag, with 107Ag being slightly more abundant (51.839% natural abundance). Silver's isotopes are almost equal in abundance, something which is rare in the periodic table. Silver's atomic weight is 107.8682(2) g/mol. Twenty-eight radioisotopes have been characterized, the most stable being 105Ag with a half-life of 41.29 days, 111Ag with a half-life of 7.45 days, and 112Ag with a half-life of 3.13 hours. This element has numerous meta states, the most stable being 108mAg (t1/2 = 418 years), 110mAg (t1/2 = 249.79 days) and 106mAg (t1/2 = 8.28 days). All of the remaining radioactive isotopes have half-lives of less than an hour, and the majority of these have half-lives of less than three minutes.

Isotopes of silver range in relative atomic mass from 93.943 (94Ag) to 126.936 (127Ag); the primary decay mode before the most abundant stable isotope, 107Ag, is electron capture and the primary mode after is beta decay. The primary decay products before 107Ag are palladium (element 46) isotopes, and the primary products after are cadmium (element 48) isotopes.

The palladium isotope 107Pd decays by beta emission to 107Ag with a half-life of 6.5 million years. Iron meteorites are the only objects with a high-enough palladium-to-silver ratio to yield measurable variations in 107Ag abundance. Radiogenic 107Ag was first discovered in the Santa Clara meteorite in 1978. The discoverers suggest the coalescence and differentiation of iron-cored small planets may have occurred 10 million years after a nucleosynthetic event. 107Pd–107Ag correlations observed in bodies that have clearly been melted since the accretion of the solar system must reflect the presence of unstable nuclides in the early solar system.

Read more about this topic:  Silverness

Other articles related to "isotopes, isotope":

Closure Temperature
... has cooled so that there is no longer any significant diffusion of the parent or daughter isotopes out of the system and into the external environment ... structure begins to form and diffusion of isotopes slows ... has formed sufficiently to prevent diffusion of isotopes ...
History Of Mass Spectrometry - Discovery of Isotopes
... He was able to identify isotopes of chlorine (35 and 37), bromine (79 and 81), and krypton (78, 80, 82, 83, 84 and 86), proving that these natural occurring elements are ... to identify no fewer than 212 of the 287 naturally occurring isotopes ... His work on isotopes also led to his formulation of the Whole Number Rule which states that "the mass of the oxygen isotope being defined, all the other isotopes have masses that are very nearly ...
Cromium - Characteristics - Isotopes
... Naturally occurring chromium is composed of three stable isotopes 52Cr, 53Cr and 54Cr with 52Cr being the most abundant (83.789% natural abundance) ... All of the remaining radioactive isotopes have half-lives that are less than 24 hours and the majority of these have half-lives that are less than 1 ... combined with manganese isotopic contents and have found application in isotope geology ...
Canadian Penning Trap Mass Spectrometer - Development
... designed to provide high-precision mass measurements of short-lived isotopes using radio-frequency (RF) fields ... Accurate mass measurements of particular isotopes such as selenium-68 are important in the understanding of the detailed reaction mechanisms involved in the rapid-proton capture process, which occurs ... In the current configuration, more than 100 radioactive isotopes have been measured with half-lives much less than a second and with a precision (Δm/m) approaching 10-9 ...