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Atomic weight
Ni · nickel
니켈
Takeaway
- Recommended or revised 9 times between 1902 and 2024 (first record 1902, latest revision 2007).
- All 4 revisions whose previous recommendation had an uncertainty kept the new value inside the previous (expanded) range.
- The current standard atomic weight is 58.6934(4) (recommended in 2007).
| 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 | 58.7 | no uncertainty | O=16 | 58.69779875 | 10.1007/BF01370337 | |
| 1909 | 58.68 | no uncertainty | O=16 | 58.6777995 | 10.1021/ja01931a001 | |
| 1925 | 58.69 | no uncertainty | O=16 | 58.68779912 | 10.1039/CT9252700913 | |
| 1955 | 58.71 | no uncertainty | O=16 | 58.70779838 | 10.1021/ja01595a001 | |
| 1969 | 58.71(3) | value(uncertainty) | 12C=12 | 58.71 | 10.1351/pac197021010091 | |
| 1973 | 58.70(1) | value(uncertainty) | 12C=12 | 58.7 | −0.333 | 10.1351/pac197437040589 |
| 1979 | 58.69(1) | value(uncertainty) | 12C=12 | 58.69 | −1.000 | 10.1351/pac198052102349 |
| 1989 | 58.6934(2) | value(uncertainty) | 12C=12 | 58.6934 | 0.340 | 10.1351/pac199163070975 |
| 2007 | 58.6934(4) | value(uncertainty) | 12C=12 | 58.6934 | 0.000 | 10.1351/PAC-REP-09-08-03 |
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