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Pure Appl. Chem., Vol. 70, No. 1, pp. 237-257, 1998.
History of the recommended atomic-weight values* Niobium Z E Year Ar(E) U[Ar(E)] D[Ar(E)] D[Ar(E)] U[Ar(E)] 41 Nb 1894 94 0.1 1.1 3.6 1897 93.73 0.3 0.82 27 1900 93.7 0.03 0.79 2.6 1903 94 0.3 1.1 0.36 1909 93.5 0.3 0.59 2 1917 93.1 0.3 0.19 0.64 1931 93.3 0.3 0.39 1.3 1935 92.91 0.03 0.0036 0.12 1961 92.906 0.003 -0.00038 -0.13 1969 92.9064 0.0001 0.00002 0.2 1985 92.90638 0.00002 > 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 7 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*
Niobium
> 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 7 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].
