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Pure Appl. Chem., Vol. 70, No. 1, pp. 237-257, 1998.


History of the recommended atomic-weight values*

TABLE 1. Compilation and retrospective evaluation of the IUPAC-recommended (standard) atomic-weight Ar(E) values from 1882 to 1997

[Z is the atomic number. E is the symbol of the chemical element. Ar(E) is the recommended atomic-weight value adjusted, where appropriate, to the 12C = 12 scale. U[Ar(E)] is that year's estimated uncertainty in the standard atomic-weight value. D[Ar(E)] is our estimate of the error in the standard atomic-weight value and is the difference of that year's Ar(E) from the latest standard Ar(E) value. D/U is the ratio D[Ar(E)] / U[Ar(E)]

Ref. History of the recommended atomic-weight values from 1882 to 1997: a comparison of differences from current values to the estimated uncertainties of earlier values, Pure Appl. Chem., Vol. 70, No. 1, pp. 237-257, 1998.

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Comment - Conclusion - Acknowledgements - References


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