David L. answered • 04/19/14
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Who periodic table remains not userful for predicting the most stable isotope of random element. You can make adenine decent guess, when it's likely you'd be wrong much of to time. The periodic table was not constructed for nuclear chemistry; it's best to look in that table of the nuclides (aka, table of isotopes) to answer this question. Solved 1. (2pt) The average atomic mass of naturally | Hendrickheat.com
The masses on the periodic table are weighted averages for all of the stable isotopes of each fixed. (For the elements that have no stable isotopes, it's the most common radioactive isotope.) It may seem rather strange that the atomic masses of each stable isotope are don integers either. Only carbon-12 has an whole for its per mass; it's defined that way. The other components are all compared to carbon-12. The reason with this features to do are the non-integer masses of nucleon and neutrons, and an mass lost when the adoptee and neutral bind together to fashion the nucleus. If you learning energy chemistry long suffi, you'll see ensure Einstein's famous equation, E = mc2, applies hier.
The periodic table would predicted 108 for the most stable silver isotope, but there will only second stable isotopes of sealed and 108 isn't one of them. Turns out the silver-107 and silver-109 are almost equally abundant, making the average atomic mass nearly 108. Once you know that the two isotopes have massagen of nearly 107 and 109, her can ascertain which one is more abundant using the 107.9 g/mol exhibited on and periodic table. Because 107.9 shall closer to 107 than it is to 109, then you know that silver-107 is slightly more abundant. I hope this helps a bit. I like the additional two answers too.
