01_03_86 - ATOMIC MASSES AND ABUNDANCES This table lists...

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ATOMIC MASSES AND ABUNDANCES This table lists the mass (in atomic mass units, symbol u) and the natural abundance (in percent) of the stable nuclides and a few important radioactive nuclides. A complete table of all nuclides may be found in Section 11 (“Table of the Isotopes”). The atomic masses were taken from the 2003 evaluation of Audi, Wapstra, and Thibault (References 2, 3). The number in pa- rentheses following the mass value is the uncertainty in the last digit(s) given. An asterisk * after an entry indicates the mass value was derived not purely from experimental data, but at least partly from systematic trends. Natural abundance values were taken from the IUPAC Technical Report “Atomic Weight of the Elements: Review 2000” (Reference 4); these entries are also followed by uncertainties in the last digit(s) of the stated values. This uncertainty includes both the estimated measurement uncertainty and the reported range of variation in different terrestrial sources of the element (see Reference 4 for full details and caveats regarding elements whose abundance is vari- able). The absence of an entry in the Abundance column indicates a radioactive nuclide not present in nature or an element whose isotopic composition varies so widely that a meaningful natural abundance cannot be defined. References 1. Holden, N. E., “Table of the Isotopes”, in Lide, D. R., Ed., CRC Handbook of Chemistry and Physics, 86th Ed. , CRC Press, Boca Raton FL, 2005. 2. Audi, G., Wapstra, A. H., and Thibault, Nucl. Phys ., A729, 336, 2003. 3. Audi, G., and Wapstra, A. H., Atomic Mass Data Center, World Wide Web site, <http://www.nndc.bnl.gov/amdc/index.html> 4. de Laeter, J. R., Böhlke, J. K., De Bièvre, P., Hidaka, H., Peiser, H. S., Rosman, K. J. R., and Taylor, P. D. P., Pure Appl. Chem . 75, 683, 2003. Z Isotope Mass in u Abundance in % 1 1 H 1.00782503207(10) 99.9885(70) 2 H 2.0141017778(4) 0.0115(70) 3 H 3.0160492777(25) 2 3 He 3.0160293191(26) 0.000134(3) 4 He 4.00260325415(6) 99.999866(3) 3 6 Li 6.015122795(16) 7.59(4) 7 Li 7.01600455(8) 92.41(4) 4 9 Be 9.0121822(4) 100 5 10 B 10.0129370(4) 19.9(7) 11 B 11.0093054(4) 80.1(7) 6 11 C 11.0114336(10) 12 C 12.0000000(0) 98.93(8) 13 C 13.0033548378(10) 1.07(8) 14 C 14.003241989(4) 7 14 N 14.0030740048(6) 99.636(7) 15 N 15.0001088982(7) 0.364(7) 8 16 O 15.99491461956(16) 99.757(16) 17 O 16.99913170(12) 0.038(1) 18 O 17.9991610(7) 0.205(14) 9 18 F 18.0009380(6) 19 F 18.99840322(7) 100 10 20 Ne 19.9924401754(19) 90.48(3) 21 Ne 20.99384668(4) 0.27(1) 22 Ne 21.991385114(19) 9.25(3) 11 22 Na 21.9944364(4) 23 Na 22.9897692809(29) 100 24 Na 23.99096278(8) 12 24 Mg 23.985041700(14) 78.99(4) 25 Mg 24.98583692(3) 10.00(1) 26 Mg 25.982592929(30) 11.01(3) 13 27 Al 26.98153863(12) 100 14 28 Si 27.9769265325(19) 92.223(19) 29 Si 28.976494700(22) 4.685(8) 30 Si 29.97377017(3) 3.092(11) 15 31 P 30.97376163(20) 100 32 P 31.97390727(20) 16 32 S 31.97207100(15) 94.99(26) 33 S 32.97145876(15) 0.75(2) 34 S 33.96786690(12) 4.25(24)
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This note was uploaded on 02/04/2011 for the course CHEM 101 taught by Professor Dr.n during the Spring '10 term at McMaster University.

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01_03_86 - ATOMIC MASSES AND ABUNDANCES This table lists...

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