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Four-place table of standard atomic weight values of hydrogen through uranium compared since 1961

Dates

Publication Date
Time Period
2016-11-07

Citation

Coplen, T.B., Meyers, F., and Holden, N.E., 2016, Four-place table of standard atomic weight values of hydrogen through uranium compared since 1961: U.S. Geological Survey data release, http://dx.doi.org/10.5066/F7668B9R.

Summary

Four-figure standard atomic weights of the chemical elements are shown for 1961, 1975, 1983, 2007, 2009, 2011, 2013, 2015, and the current value for 2016. Values between 1975 and 2015 are only shown when there is a change in value with respect to the previous column.

Contacts

Point of Contact :
Tyler B Coplen
Originator :
Tyler B Coplen, Fabienne Meyers, Norman E Holden
Metadata Contact :
Tyler B Coplen
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase
USGS Mission Area :
Water Resources
SDC Data Owner :
National Research Program

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Four-place table of standard atomic weights of hydrogen-uranium since 1961.pdf 276.16 KB
Four-place table of standard atomic weights of hydrogen-uranium since 1961.docx 85.92 KB
Four-place table of standard atomic weights of hydrogen-uranium since 1961.xlsx 58.61 KB

Purpose

Forty years ago, the first Table of Atomic Weights to Four Significant Figures, based on 1975 values, was developed under guidance of the Commission on Atomic Weights of the International Union of Pure and Applied Chemistry (IUPAC) and published by the IUPAC Committee on Teaching of Chemistry (IUPAC Committee on Teaching Chemistry, 1975). In more recent years, similar tabulations were also published in the IUPAC scientific journal, Pure and Applied Chemistry, along with detailed biennial reviews of the Commission on Isotopic Abundances and Atomic Weights (Commission). The Commission recognized that the details and number of significant digits reported in the full Table of Standard Atomic Weights (for example, up to nine digits for aluminium (aluminum) or fluorine, or even ten digits for caesium (cesium)) exceeds the need and interests of many users. The abridged table was also published with the expectation that subsequent changes would be minimal. As a retrospective review of such changes, we determined the four-digit standard atomic weight values (either published or deduced) over time for elements from hydrogen through uranium since the seminal 1961 report by A. E. Cameron and E. Wichers (1962). This report was the first element-by-element review of all of the standard atomic weight values by the Commission, and it corresponded with changing the atomic mass standard from oxygen-16 to carbon-12.

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DOI https://www.sciencebase.gov/vocab/category/item/identifier doi:10.5066/F7668B9R

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