Other pages in this series (88)
Atomic weight
Zn · zinc
아연
Takeaway
- Recommended or revised 9 times between 1902 and 2024 (first record 1902, latest revision 2007).
- Of 4 revisions whose previous recommendation had an uncertainty, 1 (2007) put the new value outside the previous (expanded) range.
- The current standard atomic weight is 65.38(2) (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 | 65.4 | no uncertainty | O=16 | 65.3975475 | 10.1007/BF01370337 | |
| 1909 | 65.37 | no uncertainty | O=16 | 65.36754862 | 10.1021/ja01931a001 | |
| 1925 | 65.38 | no uncertainty | O=16 | 65.37754825 | 10.1039/CT9252700913 | |
| 1961 | 65.37 | no uncertainty | 12C=12 | 65.37 | 10.1021/ja00881a001 | |
| 1969 | 65.37(3) | value(uncertainty) | 12C=12 | 65.37 | 10.1351/pac197021010091 | |
| 1971 | 65.38(1) | value(uncertainty) | 12C=12 | 65.38 | 0.333 | 10.1351/pac197230030637 |
| 1983 | 65.39(2) | value(uncertainty) | 12C=12 | 65.39 | 1.000 | 10.1351/pac198456060653 |
| 2001 | 65.409(4) | value(uncertainty) | 12C=12 | 65.409 | 0.950 | 10.1351/pac200375081107 |
| 2007 | 65.38(2) | value(uncertainty) | 12C=12 | 65.38 | −7.250 | 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