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


History of the recommended atomic-weight values*

Tungsten (Wolfram)

Z
E
Year
Ar(E)
U[Ar(E)]
D[Ar(E)]
D[Ar(E)]
U[Ar(E)]
74 W 1882 184.03 0.1 0.19 1.9
1894 184 3 0.16 0.053
1895 184.9 0.3 1.1 3.5
1896 184.84 0.03 1 33
1897 184.83 0.03 0.99 33
1900 184.0 0.3 0.16 0.53
1938 183.92 0.03 0.08 2.7
1955 183.80 0.03 -0.04 -1.3
1961 183.85 0.03 0.01 0.33
1969 183.85 0.03 0.01 0.33
1991 183.84 0.01

> 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
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