Template:Infobox element/symbol-to-saw

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• Standard atomic weight

Overview: formal values of the standard atomic weight
Element (E) ​		Ar, standard(E) Table 1	Value type ​	Ar, std abridged(E) Table 2	Ar, std conventional(E) Table 3	Ar, std formal short(E) Tables 2 and 3	Mass number [most stable isotope]
hydrogen	1H	[1.00784, 1.00811]	Template:Infobox element/symbol-to-saw/value-type	[1.0078, 1.0082]	1.008	1.008
nitrogen	7N	[14.00643, 14.00728]	Template:Infobox element/symbol-to-saw/value-type	[14.006, 14.008]	14.007	14.007
fluorine	9F	18.998403163(6)	Template:Infobox element/symbol-to-saw/value-type	18.998		18.998
calcium	20Ca	40.078(4)	Template:Infobox element/symbol-to-saw/value-type	40.078(4)		40.078(4)
technetium	43Tc	(none)	Template:Infobox element/symbol-to-saw/value-type				98

• Data: /symbol-to-saw
• For most stable isotope mass number (Tc, Rf, Uue etc.) see also {{Infobox element/symbol-to-most-stable-isotope}}.

Usage

Use parameter |format=:

{{Infobox element/symbol-to-saw|format=...}}

• |format=standard (default):
• |format=abridged:
• |format=conventional:
• |format=formal-short:
• |format=formal-short-rounded:
• |format=plain-short-value:
• |format=year-changed:
• |format=value-type:

For most stable isotope (Tc, Rf, Uue etc.) see also {{Infobox element/symbol-to-most-stable-isotope}}.

Overview

See also: Overview, and compare with wikidata

Updates

  (This list:   )

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.

• 2009 {{CIAAW2009}} (introducing interval notation; Ge):

Template:CIAAW2009

• 2011 {{CIAAW2011}} (interval for Br, Mg):

Template:CIAAW2011

• 2013 {{CIAAW2013}} (all elements listed):

Template:CIAAW2013/cite journal

• 2015 {{CIAAW2015}} (ytterbium changed):

Template:CIAAW2015

• 2017 {{CIAAW2017}} (14 values changed):

Template:CIAAW2017

• 2019 (hafnium value changed): Meija, Juris; et al. (2019-12-09). "Standard atomic weight of hafnium revised". CIAAW. Retrieved 2020-02-25.
• 2020* (lead value changed): Zhu, Xiang-Kun; Benefield, Jacqueline; Coplen, Tyler B.; Gao, Zhaofu; Holden, Norman E. (1 October 2020). "Variation of lead isotopic composition and atomic weight in terrestrial materials (IUPAC Technical Report)". doi:10.1515/pac-2018-0916.

* "2020" is an inconsistent year for change publication: CIAAW maintains that only odd years, changes are publicised.

• 2021 {{CIAAW2021}} (all elements listed); (4 values changed; introduced new symbol; merge "conventional" into "abridged" columns; change uncertainty notation (use "±")

Template:CIAAW2021

Uncertainty handling

About notation and handling of the uncertainty in the values, including those in [ ] range values:

• Possolo, Antonio; van der Veen, Adriaan M.H.; Meija, Juris; et al. (4 Jan 2018). "Interpreting and propagating the uncertainty of the standard atomic weights (IUPAC Technical Report)". doi:10.1515/pac-2016-0402. Retrieved 20 Oct 2020.
• {{CIAAW2021}}: changing notation (i.e., interpretation, not the value) from 123.45(2) into 123.45±0.02

Outdated references
{{NUBASE 1997}} — Audi {{NUBASE 2003}} — Audi (used in the 2008 enwiki "Isotopes of <element>" Big Tables) {{NUBASE 2012}} {{CIAAW2003}} — De Laeter {{CIAAW 2005}} — Wieser {{CRC85}} ({{CRC85|chapter=11}}) &mdsh; Holden "Universal Nuclide Chart". nucleonica. -- broken/bad access

See also: {{Isotopes table/references}}

See also

• {{Standard atomic weight of the elements}} - list, mainspace
• {{Infobox element/standard atomic weight/value illustration}} - illustrative table with 6 examples, mainspace

• {{Infobox element/symbol-to-saw/overview}}
• {{Infobox element/symbol-to-saw/overview-wikidata}} -- compares values with WD values

• {{Infobox element/symbol-to-most-stable-isotope}}

• {{Infobox element/standard atomic weight}} - {{Infobox element}} (talk) formatter