Element (E) |
Ar°(E) |
Value type |
Ar°(E), abridged or conventional |
Mass number [most stable isotope] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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hydrogen | 1H | [1.00784, 1.00811] | interval | 1.0080±0.0002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
nitrogen | 7N | [14.00643, 14.00728] | interval | 14.007±0.001 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
fluorine | 9F | 18.998403162±0.000000005 | number ± uncertainty | 18.998±0.001 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
calcium | 20Ca | 40.078±0.004 | number ± uncertainty | 40.078±0.004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
technetium | 43Tc | (none) | most stable isotope | [97] |
CIAAW may publish changes to atomic weights (including its precision and derived values). Since 1947, any update this is done in odd years nominally; the actual date of publication may be some time later.
((CIAAW2009))
(introducing interval notation; Ge):((CIAAW2011))
(interval for Br, Mg):((CIAAW2013))
(all elements listed):((CIAAW2015))
(ytterbium changed):((CIAAW2017))
(14 values changed):((CIAAW2021))
(all elements listed); (4 values changed; introduced new symbol; merge "conventional" into "abridged" columns; change uncertainty notation (use "±")About notation and handling of the uncertainty in the values, including those in [ ] range values:
Outdated references
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