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Atomic weight
Rb · rubidium
루비듐
Takeaway
- Recommended or revised 7 times between 1902 and 2024 (first record 1902, latest revision 1969).
- The current standard atomic weight is 85.4678(3) (recommended in 1969).
| Yearyear of the recommendation | Value (as printed)as printed in CIAAW's table; digits in parentheses are the uncertainty (expanded range) in the last digits | Notationvalue(uncertainty), interval or no uncertainty | Scalebefore 1961 oxygen = 16, from 1961 ¹²C = 12 | Value, ¹²C scalepre-1961 values multiplied by 15.9994/16 | z vs previous(new − previous) ÷ previous uncertainty | ReportDOI of the CIAAW report |
|---|---|---|---|---|---|---|
| 1902 | 85.4 | no uncertainty | O=16 | 85.3967975 | 10.1007/BF01370337 | |
| 1905 | 85.5 | no uncertainty | O=16 | 85.49679375 | 10.1021/ja01979a001 | |
| 1909 | 85.45 | no uncertainty | O=16 | 85.44679562 | 10.1021/ja01931a001 | |
| 1925 | 85.44 | no uncertainty | O=16 | 85.436796 | 10.1039/CT9252700913 | |
| 1937 | 85.48 | no uncertainty | O=16 | 85.4767945 | 10.1039/JR9370001900 | |
| 1961 | 85.47 | no uncertainty | 12C=12 | 85.47 | 10.1021/ja00881a001 | |
| 1969 | 85.4678(3) | value(uncertainty) | 12C=12 | 85.4678 | 10.1351/pac197021010091 |
Source: Standard atomic weights © IUPAC/CIAAW 2016–2024. Commission on Isotopic Abundances and Atomic Weights, Historical changes of standard atomic weights (compiled by J. Meija), https://www.ciaaw.org/historical-atomic-weights.htm