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


History of the recommended atomic-weight values*

Cobalt

Z
E
Year
Ar(E)
U[Ar(E)]
D[Ar(E)]
D[Ar(E)]
U[Ar(E)]
27 Co 1882 59.02 0.1 0.087 0.87
1894 59 3 0.067 0.022
1895 59.5 0.3 0.57 1.9
1896 58.95 0.03 0.017 0.56
1897 58.93 0.03 -0.0032 -0.11
1898 58.99 0.03 0.057 1.9
1900 59 0.3 0.067 0.22
1909 58.97 0.03 0.037 1.2
1925 58.94 0.03 0.0068 0.23
1961 58.9332 0.0003 0 0
1969 58.9332 0.0001 0 0
1985 58.9332 0.00001 0 0
1995 58.9332 0.000009

> 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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