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


History of the recommended atomic-weight values*

Thallium

Z
E
Year
Ar(E)
U[Ar(E)]
D[Ar(E)]
D[Ar(E)]

U[Ar(E)]
81 Tl 1882 204.18 0.1 -0.2 -2
1896 204.15 0.03 -0.23 -7.8
1903 204.1 0.3 -0.28 -0.94
1909 204 0.3 -0.38 -1.3
1925 204.39 0.03 0.0067 0.22
1961 204.37 0.03 -0.013 -0.44
1969 204.37 0.03 -0.013 -0.44
1979 204.383 0.001 -0.0003 -0.3
1985 204.3833 0.0002

> 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
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