Template:Infobox element/standard atomic weight/value illustration

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Element (E)
Ar, standard(E)
Table 1[2]
Value type
Ar, std abridged(E)
Table 2[3]
Ar, std conventional(E)
Table 3[4]
Ar, std formal short(E)
Tables 2 and 3[5]
Mass number
[most stable isotope]
hydrogen 1H [1.007841.00811] interval [1.00781.0082] 1.008 1.008
nitrogen 7N [14.0064314.00728] interval [14.00614.008] 14.007 14.007
fluorine 9F 18.998403163(6) number ± uncertainty 18.998 18.998
calcium 20Ca 40.078(4) number ± uncertainty 40.078(4) 40.078(4)
technetium 43Tc (none) most stable isotope [97]
  1. Meija, Juris; et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry. 88 (3): 265–91. doi:10.1515/pac-2015-0305.
  2. Meija 2016, Table 1.
  3. Meija 2016, Table 2.
  4. Meija 2016, Table 3.
  5. Meija 2016, Tables 2 and 3.