I  U  P  A  C




News & Notices

Organizations & People

Standing Committees

Divisions

Projects

Reports
..By Year
..By Division
..Other Committees
..Provisionals

Publications

Symposia

AMP

Links of Interest

Search the Site

Home Page

 

 

 

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


History of the recommended atomic-weight values*

Ytterbium

Z
E
Year
Ar(E)
U[Ar(E)]
D[Ar(E)]
D[Ar(E)]
U[Ar(E)]
70 Yb 1882 173.16 0.1 0.12 1.2
1894 173 0.3 -0.04 -0.13
1897 173.19 0.03 0.15 5
1900 173.2 0.3 0.16 0.53
1903 173 3 -0.04 -0.013
1909 172 0.3 -1 -3.5
1916 173.5 0.3 0.46 1.5
1925 173.6 0.3 0.56 1.9
1931 173.5 0.3 0.46 1.5
1934 173.04 0.03 0 0
1969 173.04 0.03

> 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.