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Atomic weight
Li · lithium
리튬
Takeaway
- Recommended or revised 8 times between 1902 and 2024 (first record 1902, latest revision 2009).
- The one revision whose previous recommendation had an uncertainty kept the new value inside the previous (expanded) range.
- Since 2009, it has been given as the interval [6.938, 6.997] rather than a single value (the range found in normal materials).
| 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 | 7.03 | no uncertainty | O=16 | 7.02973638 | 10.1007/BF01370337 | |
| 1909 | 7.00 | no uncertainty | O=16 | 6.9997375 | 10.1021/ja01931a001 | |
| 1911 | 6.94 | no uncertainty | O=16 | 6.93973975 | 10.1021/ja01928a001 | |
| 1925 | 6.940 | no uncertainty | O=16 | 6.93973975 | 10.1039/CT9252700913 | |
| 1961 | 6.939 | no uncertainty | 12C=12 | 6.939 | 10.1021/ja00881a001 | |
| 1969 | 6.941(3) | value(uncertainty) | 12C=12 | 6.941 | 10.1351/pac197021010091 | |
| 1983 | 6.941(2) | value(uncertainty) | 12C=12 | 6.941 | 0.000 | 10.1351/pac198456060653 |
| 2009 | [6.938, 6.997] | interval | 12C=12 | 6.9675 (interval midpoint, for calculation) | 10.1351/PAC-REP-10-09-14 |
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