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Pure Appl. Chem.,
Vol. 70, No. 1, pp. 237-257, 1998.
History of the recommended atomic-weight values*
Aluminium, aluminum
|
Z
|
E
|
Year
|
Ar(E)
|
U[Ar(E)]
|
D[Ar(E)]
|
D[Ar(E)]
U[Ar(E)]
|
| 13 |
Al |
1882 |
27.08 |
0.1 |
0.098 |
.98 |
|
|
1894 |
27 |
3 |
0.018 |
.006 |
|
|
1896 |
27.11 |
0.03 |
0.13 |
4.3 |
|
|
1900 |
27.1 |
0.3 |
0.12 |
0.40 |
|
|
1922 |
27.0 |
0.3 |
0.018 |
0.062 |
|
|
1925 |
26.97 |
0.03 |
-0.012 |
-0.38 |
|
|
1951 |
26.98 |
0.03 |
-0.0015 |
-0.051 |
|
|
1961 |
26.9815 |
0.0003 |
-0.00004 |
-0.13 |
|
|
1969 |
26.9815 |
0.0001 |
-0.00004 |
-0.38 |
|
|
1971 |
26.98154 |
0.00001 |
0.000002 |
0.2 |
|
|
1985 |
26.981539 |
0.000005 |
0.000001 |
0.2 |
|
|
1995 |
26.981538 |
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
Copyright © 1997-2000 International Union of Pure and Applied Chemistry.
|
