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


History of the recommended atomic-weight values*

Silicon

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

U[Ar(E)]
14 Si 1882 28.26 0.1 0.17 1.7
1894 28.4 0.3 0.31 1.1
1909 28.3 0.3 0.21 0.72
1922 28.1 0.3 0.014 0.048
1925 28.06 0.03 -0.026 -0.85
1951 28.09 0.03 0.0045 0.15
1961 28.086 0.001 0.0005 0.5
1969 28.086 0.003 0.0005 0.17
1975 28.0855 0.0003

> 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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