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


History of the recommended atomic-weight values*

Phosphorus

Z
E
Year
Ar(E)
U[Ar(E)]
D[Ar(E)]
D[Ar(E)]
U[Ar(E)]
15 P 1882 31.03 0.1 0.056 0.56
1894 31 3 0.026 0.009
1896 31.02 0.03 0.046 1.5
1900 31 0.3 0.026 0.087
1911 31.04 0.03 0.066 2.2
1925 31.027 0.003 0.053 18
1931 31.02 0.03 0.046 1.5
1939 30.98 0.03 0.0062 0.21
1951 30.965 0.003 -0.0088 -2.9
1961 30.9738 0.0003 0.000039 0.13
1969 30.9738 0.0001 0.000039 0.39
1971 30.97376 0.00001 -0.000001 -0.1
1985 30.973762 0.000004 0.000001 0.25
1995 30.973761 0.000002

> 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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