Physical Constants Metrics
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Atomic weight

Cd · cadmium

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Takeaway
  • Recommended or revised 8 times between 1902 and 2024 (first record 1902, latest revision 2013).
  • All 3 revisions whose previous recommendation had an uncertainty kept the new value inside the previous (expanded) range.
  • The current standard atomic weight is 112.414(4) (recommended in 2013).
0+10⁻⁴−10⁻⁴+10⁻³−10⁻³19001920194019601980200020201961 scale change
Relative deviation from the current (or last) value, symmetric-log axis. Bars: uncertainty (expanded range); open circles: no uncertainty; orange boxes: intervals.
Yearyear of the recommendationValue (as printed)as printed in CIAAW's table; digits in parentheses are the uncertainty (expanded range) in the last digitsNotationvalue(uncertainty), interval or no uncertaintyScalebefore 1961 oxygen = 16, from 1961 ¹²C = 12Value, ¹²C scalepre-1961 values multiplied by 15.9994/16z vs previous(new − previous) ÷ previous uncertaintyReportDOI of the CIAAW report
1902112.4no uncertaintyO=16112.39578510.1007/BF01370337
1909112.40no uncertaintyO=16112.39578510.1021/ja01931a001
1925112.41no uncertaintyO=16112.4057846210.1039/CT9252700913
1961112.40no uncertainty12C=12112.410.1021/ja00881a001
1969112.40(1)value(uncertainty)12C=12112.410.1351/pac197021010091
1975112.41(1)value(uncertainty)12C=12112.411.00010.1351/pac197647010075
1985112.411(8)value(uncertainty)12C=12112.4110.10010.1351/pac198658121677
2013112.414(4)value(uncertainty)12C=12112.4140.37510.1515/pac-2015-0305

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