Atomic weights of the elements 2001 (IUPAC technical report)

R. D. Loss*, L. Schultz, J. K. Böhlke, T. Ding, M. Ebihara, G. Ramendik, P. D.P. Taylor, M. J. Berglund, C. A.M. Brenninkmeijer, H. Hidaka, D. J. Rokop, T. Walczyk, S. Yoneda

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

109 Citations (Scopus)


The biennial review of atomic-weight, Ar(E), determinations and other cognate data have resulted in changes for the standard atomic weights of the following elements: From To Zinc 65.39 ± 0.02 65.409 ± 0.004 Krypton 83.80 ± 0.01 83.798 ± 0.002 Molybdenum 95.94 ± 0. 01 95.94 ± 0.02 Dysprosium 162.50 ± 0.03 162.500 ± 0.001 Presented are updated tables of the standard atomic weights and their uncertainties estimated by combining experimental uncertainties and terrestrial variabilities. In addition, this report again contains an updated table of relative atomic-mass values and half-lives of selected radioisotopes. Changes in the evaluated isotope abundance values from those published in 1997 are relatively minor and will be published in a major review of each element in 2003. Many elements have a different isotopic composition in some nonterrestrial materials. Some recent data on parent nuclides that might affect isotope abundances or atomic-weight values are included in this report for the information of the interested scientific community.

Original languageEnglish
Pages (from-to)1107-1122
Number of pages16
JournalPure and Applied Chemistry
Issue number8
Publication statusPublished - 2003 Aug 1
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)


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