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


History of the recommended atomic-weight values*

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

U[Ar(E)]
78 Pt 1882 194.87 0.1 -0.21 -2.1
1894 195 3 -0.078 -0.026
1896 194.89 0.03 -0.19 -6.3
1900 194.9 0.3 -0.18 -0.59
1903 194.8 0.3 -0.28 -0.93
1909 195.0 0.3 -0.078 -0.26
1911 195.2 0.3 0.12 0.41
1925 195.23 0.03 0.15 5.1
1955 195.03 0.03 -0.048 -1.6
1969 195.09 0.03 0.012 0.4
1979 195.08 0.03 0.002 0.067
1995 195.078 0.002    

> 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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