Ru · ruthenium

루테늄

Takeaway

Recommended or revised 5 times between 1902 and 2024 (first record 1902, latest revision 1983).
The one revision whose previous recommendation had an uncertainty kept the new value inside the previous (expanded) range.
The current standard atomic weight is 101.07(2) (recommended in 1983).

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 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	101.7	no uncertainty	O=16	101.69618625		10.1007/BF01370337
1953	101.1	no uncertainty	O=16	101.09620875		10.1039/JR9540004713
1961	101.07	no uncertainty	12C=12	101.07		10.1021/ja00881a001
1969	101.07(3)	value(uncertainty)	12C=12	101.07		10.1351/pac197021010091
1983	101.07(2)	value(uncertainty)	12C=12	101.07	0.000	10.1351/pac198456060653

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