Template:Infobox element/symbol-to-saw/CIAAW-saw-element-page

{{Infobox element/symbol-to-saw/CIAAW-saw-element-page/format}}

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Standard atomic weight


Overview: formal values of the standard atomic weight^[1] v t e
Element (E)		A_{r, standard}(E) Table 1^[2]	Value type	A_{r, std abridged}(E) Table 2^[3]	A_{r, std conventional}(E) Table 3^[4]	A_{r, std formal short}(E) Tables 2 and 3^[5]	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=:

|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

Template:Infobox element/symbol-to-saw/overview

Updates

(This list: view • edit )

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}}

v t e Chemical element data sets
ID	{{Infobox element/symbol-to-name}} (overview IDs) {{Infobox element/symbol-to-Z}} {{Infobox element/symbol-to-Z-(reverse)}} (Z-to-symbol) {{Infobox element/symbol-to-QID}} {{Infobox element/symbol-to-symbol}} (symbol self-check, formatting)
Periodic table	{{Infobox element/symbol-to-group}} 1–18 (overview properties) {{Infobox element/symbol-to-period}} Template:Element cell/period–Template:Element cell/period {{Infobox element/symbol-to-block}} s-p-d-f-g {{Infobox element/symbol-to-symbol-NESW}} (neighbours in the PT)
Properties (overview)	{{Infobox element/symbol-to-metal-moid-nonmetal}} {{Infobox element/symbol-to-occurrence}} {{Infobox element/symbol-to-phase}} (state of matter) {{Infobox element/symbol-to-allotropes}} (with overview) {{Infobox element/symbol-to-electron-configuration}} (Overview electron configuration) {{Infobox element/symbol-to-term-symbol}} · (Overview; as used) {{Infobox element/symbol-to-oxidation-state}} {{Infobox element/symbol-to-valence-group}}
Isotopes	{{Infobox element/symbol-to-saw}} standard atomic weight (s.a.w. overview, s.a.w. comparing enwiki-wikidata) {{Infobox element/symbol-to-most-stable-isotope}} (when not stable only) {{Infobox element/symbol-to-massnumber}} (isotope)
Etymology	{{List of chemical element name etymologies}} {{Infobox element/symbol-to-symbol-etymology}} (11x, non-trivial, overview)
enwiki	{{Infobox element/symbol-to-pagename}} {{Infobox element/symbol-to-shyphen-name}} {{Infobox element/symbol-to-pronunciation}} · (overview) {{Infobox element/symbol-to-article-quality}} (not in mainspace) {{Infobox element/symbol-from-pagename}} * {{Infobox element/symbol-to-odd-even}} (Z; to alternate table background)
Images	{{Infobox element/symbol-to-top-image}} · (overview) {{Infobox element/symbol-to-spectral-lines-image}} · (overview mainspace) {{Infobox element/symbol-to-zh}} · {{ID overview}} -- new; not in mainspace {{Infobox element/symbol-to-pymol-color}} · {{PyMOL color}} -- new
Wikidata	{{Infobox element/symbol-to-QID}} · (overview)
nav	{{Infobox element/symbol-to--navbox}} {{Infobox element/symbol-to--overview1}}
Overviews	{{IDs}} · {{Pronunciation}} {{Properties}} {{Infobox formatting}} (group, period, block) {{Top images}} · {{Spectral lines images}} {{elconfig}} {{s.a.w. overview}} · {{s.a.w. compare enwiki–wikidata}} {{Oxidation state}} · (also: {{List of oxidation states of the elements}}, {{compare: /datacheck}})
Developing	{{Infobox element/symbol-to--(blank)}} {{Infobox element/symbol-to--(118rows)}} {{Infobox element/name-to-symbol}} (inverse) {{Infobox element/symbol-to-sets}} (talk #Per_element_list, Oct 2020) ~~{{Infobox element/symbol-to-category}}~~ (deprecated, June 2021; block colors or none (b/w) are used)
Data hardcoded (not using these datalists)	{{element cell}} etc., in articles: element cell articles, cell-linked, cell-large, cell-property data: {{List of oxidation states}} articles: {{List of elements}} infobox references: List of References (like m.p., b.p.)
Category:Element data sets (15) · Category:Infobox element per element (124) · All pages beginning with Template:Infobox element/symbol-to-