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


History of the recommended atomic-weight values*

 Argon

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

U[Ar(E)]
18 Ar 1902 39.96 0.03 0.012 0.4
1903 39.9 0.3 -0.048 -0.16
1911 39.88 0.03 -0.068 -2.3
1919 39.9 0.3 -0.048 -0.16
1925 39.91 0.03 -0.038 -1.3
1931 39.944 0.003 -0.004 -1.3
1961 39.948 0.003 0 0
1969 39.948 0.003 0 0
1979 39.948 0.001

> 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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