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Pure Appl. Chem., Vol. 70, No. 1, pp. 237-257, 1998.
History of the recommended atomic-weight values* Potassium (Kalium) Z E Year Ar(E) U[Ar(E)] D[Ar(E)] D[Ar(E)] U[Ar(E)] 19 K 1882 39.11 0.1 0.012 0.12 1903 39.15 0.03 0.052 1.7 1909 39.1 0.03 0.0017 0.057 1925 39.096 0.003 -0.0023 -0.77 1929 39.1 0.03 0.0017 0.057 1934 39.096 0.003 -0.0023 -0.77 1951 39.1 0.03 0.0017 0.057 1961 39.102 0.003 0.0037 1.2 1969 39.102 0.003 0.0037 1.2 1971 39.098 0.003 -0.0003 -0.1 1975 39.0983 0.0003 0 0 1979 39.0983 0.0001 > Return to list or table of elements 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. Page last modified 14 June 2000 Copyright © 1997-2000 International Union of Pure and Applied Chemistry. Questions or comments about IUPAC, please contact the Secretariat. Questions regarding the website, please contact [email protected].
History of the recommended atomic-weight values*
Potassium (Kalium)
> Return to list or table of elements 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.
> Return to list or table of elements
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.
Page last modified 14 June 2000 Copyright © 1997-2000 International Union of Pure and Applied Chemistry.
Questions or comments about IUPAC, please contact the Secretariat. Questions regarding the website, please contact [email protected].