Table of Isotopic Masses and Natural Abundances
This table lists the mass and percent natural abundance for the stable nuclides. The mass of the longest lived
isotope is given for elements without a stable nuclide. Nuclides marked with an asterisk (*) in the abundance column
indicate that it is not present in nature or that a meaningful natural abundance cannot be given. The isotopic mass
data is from G. Audi, A. H. Wapstra Nucl. Phys A. 1993, 565, 1-65 and G. Audi, A. H. Wapstra Nucl. Phys A. 1995,
595, 409-480. The percent natural abundance data is from the 1997 report of the IUPAC Subcommittee for Isotopic
Abundance Measurements by K.J.R. Rosman, P.D.P. Taylor Pure Appl. Chem. 1999, 71, 1593-1607.…