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This is an overview of chemical element articles that as of December 21, 2024 are rated as featured or good content. This is followed by the list of B-class and C-class ones. The Start-class articles are presented at the end.

Periodic table by article quality

Assessment

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Chemical elements articles by quality and importance
Quality Importance
Top High Mid Low NA ??? Total
FA 9 9 8 3 29
GA 22 27 33 14 96
B 15 6 34 47 1 103
C 3 5 29 90 127
Start 1 11 80 3 1 96
Stub 1 33 34
List 1 2 8 159 1 1 172
Category 117 117
Disambig 2 2
File 105 105
Portal 1 1
Project 21 21
Redirect 3 22 7,079 7,104
Template 210 210
NA 1 3 2,020 2,024
Assessed 50 50 128 451 9,559 3 10,241
Total 50 50 128 451 9,559 3 10,241
WikiWork factors (?) ω = 1,693 Ω = 3.49

- Featured articles are Wikipedia's best - Make sure the article meets Featured article criteria and nominate at Featured article candidates. A great list or table can become a Featured list. Check out the Featured list criteria and nominate at Featured list candidates. A series of good to featured articles whose content is under a similarly good lead article can become a Featured topic. Be sure that whole series meets Featured topic criteria and nominate at Featured topic candidates.
- A-class articles are getting close to being at least featured article worthy in the opinion of WikiProject Elements participants. If you are uncertain that an article merits this classification, then post a general peer review at Wikipedia:Peer review.
- Good articles are articles that have been reviewed thoroughly and are considered to lack a few issues from being featured - Make sure the article meets Good article criteria and nominate at Wikipedia:Good article nominations
- B-class articles contain most of the important information related to the topic of the article written in a fairly decent fashion.
- C-class articles contain some information related to the topic, and usually lacks an important section (e.g. Compounds) required for the article to be considered acceptable. The information they contain is usually disjoint, poorly written, looking more like it was just dumped there.
- Start-class articles usually contain only a few of the most basic information related to the topic of the article.
- WP:Elements has de-stubbed all of the chemical element and main supporting (groups, periods, and blocks) articles.

See also: Wikipedia:Version 1.0 Editorial Team/Assessment#Grades
WikiProject article quality grading scheme
Class Criteria Reader's experience Editing suggestions Example
 FA The article has attained featured article status.
More detailed criteria
The article meets the featured article criteria:

A featured article exemplifies Wikipedia's very best work and is distinguished by professional standards of writing, presentation, and sourcing. In addition to meeting the policies regarding content for all Wikipedia articles, it has the following attributes.

  1. It is:
    1. well-written: its prose is engaging and of a professional standard;
    2. comprehensive: it neglects no major facts or details and places the subject in context;
    3. well-researched: it is a thorough and representative survey of the relevant literature; claims are verifiable against high-quality reliable sources and are supported by inline citations where appropriate;
    4. neutral: it presents views fairly and without bias;
    5. stable: it is not subject to ongoing edit wars and its content does not change significantly from day to day, except in response to the featured article process; and
    6. compliant with Wikipedia's copyright policy and free of plagiarism or too-close paraphrasing.
  2. It follows the style guidelines, including the provision of:
    1. a lead: a concise lead section that summarizes the topic and prepares the reader for the detail in the subsequent sections;
    2. appropriate structure: a substantial but not overwhelming system of hierarchical section headings; and
    3. consistent citations: where required by criterion 1c, consistently formatted inline citations using footnotes—see citing sources for suggestions on formatting references. Citation templates are not required.
  3. Media. It has images and other media, where appropriate, with succinct captions and acceptable copyright status. Images follow the image use policy. Non-free images or media must satisfy the criteria for inclusion of non-free content and be labeled accordingly.
  4. Length. It stays focused on the main topic without going into unnecessary detail and uses summary style where appropriate.
 Professional, outstanding, and thorough; a definitive source for encyclopedic information. No further content additions should be necessary unless new information becomes available; further improvements to the prose quality are often possible. Fluorine
(as of June 2017)
 A The article is well-organized and essentially complete, having been reviewed by impartial reviewers from a WikiProject, like military history, or elsewhere. Good article status is not a requirement for A-Class.
More detailed criteria
The article meets the A-Class criteria:
 A

Provides a well-written, clear and complete description of the topic, as described in Wikipedia:Article development. It should be of a length suitable for the subject, appropriately structured, and be well referenced by a broad array of reliable sources. It should be well illustrated, with no copyright problems. Only minor style issues and other details need to be addressed before submission as a featured article candidate. See the A-Class assessment departments of some of the larger WikiProjects (e.g. WikiProject Military history).

Very useful to readers. A fairly complete treatment of the subject. A non-expert in the subject matter would typically find nothing wanting. Expert knowledge may be needed to tweak the article, and style issues may need addressing. Peer review may help. Fluorine
(as of March 2012)
 GA The article has attained good article status.
More detailed criteria
The article meets the good article criteria:

A good article is:

  1. Well-written:
    1. the prose is clear, concise, and understandable to an appropriately broad audience; spelling and grammar are correct; and
    2. it complies with the Manual of Style guidelines for lead sections, layout, words to watch, fiction, and list incorporation.
  2. Verifiable with no original research:
    1. it contains a list of all references (sources of information), presented in accordance with the layout style guideline;
    2. reliable sources are cited inline. All content that could reasonably be challenged, except for plot summaries and that which summarizes cited content elsewhere in the article, must be cited no later than the end of the paragraph (or line if the content is not in prose);
    3. it contains no original research; and
    4. it contains no copyright violations or plagiarism.
  3. Broad in its coverage:
    1. it addresses the main aspects of the topic; and
    2. it stays focused on the topic without going into unnecessary detail (see summary style).
  4. Neutral: it represents viewpoints fairly and without editorial bias, giving due weight to each.
  5. Stable: it does not change significantly from day to day because of an ongoing edit war or content dispute.
  6. Illustrated, if possible, by media such as images, video, or audio:
    1. media are tagged with their copyright statuses, and valid non-free use rationales are provided for non-free content; and
    2. media are relevant to the topic, and have suitable captions.
 Useful to nearly all readers, with no obvious problems; approaching (although not equalling) the quality of a professional encyclopedia. Some editing by subject and style experts is helpful; comparison with an existing featured article on a similar topic may highlight areas where content is weak or missing. Osmium
(as of March 2012)
B The article is mostly complete and without major issues, but requires some further work to reach good article standards.
More detailed criteria
The article meets the six B-Class criteria:
  1. The article is suitably referenced, with inline citations. It has reliable sources, and any important or controversial material which is likely to be challenged is cited. Any format of inline citation is acceptable: the use of <ref> tags and citation templates such as {{cite web}} is optional.
  2. The article reasonably covers the topic, and does not contain obvious omissions or inaccuracies. It contains a large proportion of the material necessary for an A-Class article, although some sections may need expansion, and some less important topics may be missing.
  3. The article has a defined structure. Content should be organized into groups of related material, including a lead section and all the sections that can reasonably be included in an article of its kind.
  4. The article is reasonably well-written. The prose contains no major grammatical errors and flows sensibly, but does not need to be of the standard of featured articles. The Manual of Style does not need to be followed rigorously.
  5. The article contains supporting materials where appropriate. Illustrations are encouraged, though not required. Diagrams, an infobox etc. should be included where they are relevant and useful to the content.
  6. The article presents its content in an appropriately understandable way. It is written with as broad an audience in mind as possible. The article should not assume unnecessary technical background and technical terms should be explained or avoided where possible.
 Readers are not left wanting, although the content may not be complete enough to satisfy a serious student or researcher. A few aspects of content and style need to be addressed. Expert knowledge may be needed. The inclusion of supporting materials should also be considered if practical, and the article checked for general compliance with the Manual of Style and related style guidelines. Gold
(as of March 2012)
C The article is substantial, but is still missing important content or contains a lot of irrelevant material. The article should have references to reliable sources, but may still have significant issues or require substantial cleanup.
More detailed criteria
The article is better developed in style, structure and quality than Start-Class, but fails one or more of the criteria for B-Class. It may have some gaps or missing elements; need editing for clarity, balance or flow; or contain policy violations such as bias or original research. Articles on fictional topics are likely to be marked as C-Class if they are written from an in-universe perspective.
 Useful to a casual reader, but would not provide a complete picture for even a moderately detailed study. Considerable editing is needed to close gaps in content and address cleanup issues. Neodymium
(as of March 2012)
Start An article that is developing, but which is quite incomplete and may require further reliable sources.
More detailed criteria
The article has a usable amount of good content but is weak in many areas. Quality of the prose may be distinctly unencyclopedic, and MoS compliance non-existent; but the article should satisfy fundamental content policies such as notability and BLP, and provide sources to establish verifiability. No Start-Class article should be in any danger of being speedily deleted.
 Provides some meaningful content, but the majority of readers will need more. Provision of references to reliable sources should be prioritised; the article will also need substantial improvements in content and organisation. Praseodymium
(as of March 2012)
Stub A very basic description of the topic.
More detailed criteria
The article is either a very short article or a rough collection of information that will need much work to become a meaningful article. It is usually very short, but if the material is irrelevant or incomprehensible, an article of any length falls into this category.
 Provides very little meaningful content; may be little more than a dictionary definition. Any editing or additional material can be helpful. The provision of meaningful content should be a priority. s-block
(as of March 2012)
 FL The article has attained featured list status.
More detailed criteria
The article meets the featured list criteria:
  1. Prose. It features professional standards of writing.
  2. Lead. It has an engaging lead that introduces the subject and defines the scope and inclusion criteria.
  3. Comprehensiveness.
  4. Structure. It is easy to navigate and includes, where helpful, section headings and table sort facilities.
  5. Style. It complies with the Manual of Style and its supplementary pages.
  6. Stability. It is not the subject of ongoing edit wars and its content does not change significantly from day to day, except in response to the featured list process.
 Professional standard; it comprehensively covers the defined scope, usually providing a complete set of items, and has annotations that provide useful and appropriate information about those items. No further content additions should be necessary unless new information becomes available. Periodic table (large version)
(as of March 2012)
List Meets the criteria of a stand-alone list, which is an article that contains primarily a list, usually consisting of links to articles in a particular subject area. There is no set format for a list, but its organization should be logical and useful to the reader. Lists should be lists of live links to Wikipedia articles, appropriately named and organized. Table of nuclides
(as of March 2012)


Featured content

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Other high-quality articles

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Good articles (93, WP:GA)

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Elements
Other

Good topics (4, WP:GT)

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Other element articles by quality

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B-class articles (21, WP:BCLASS)

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C-class articles (16, WP:CCLASS)

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Start-class articles (7, WP:STARTCLASS)

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Supporting lists

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Lists of elements by quality

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Cleanup list

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A list of articles needing cleanup associated with this project is available. See also the tool's wiki page and the index of WikiProjects.

WP:ELEMENT pages that have a Cleanup tag are regularly listed by the Cleanup listing tool.

Other notable supporting articles

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Automatic list

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Good topics

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Good articles

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Did you know? articles

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In the News articles

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Former good articles

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Further information: Wikipedia:WikiProject Elements/Pictures

Periodic table by article quality

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Periodic table by article quality 
Chemical element
Legend

FA

GA

B

C
Periodic table
  1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
1 1
H
2
He
2 3
Li 		4
Be
5
B 		6
C 		7
N 		8
O 		9
F 		10
Ne
3 11
Na 		12
Mg
13
Al 		14
Si 		15
P 		16
S 		17
Cl 		18
Ar
4 19
K 		20
Ca 		21
Sc 		22
Ti 		23
V 		24
Cr 		25
Mn 		26
Fe 		27
Co 		28
Ni 		29
Cu 		30
Zn 		31
Ga 		32
Ge 		33
As 		34
Se 		35
Br 		36
Kr
5 37
Rb 		38
Sr 		39
Y 		40
Zr 		41
Nb 		42
Mo 		43
Tc 		44
Ru 		45
Rh 		46
Pd 		47
Ag 		48
Cd 		49
In 		50
Sn 		51
Sb 		52
Te 		53
I 		54
Xe
6 55
Cs 		56
Ba 		71
Lu 		72
Hf 		73
Ta 		74
W 		75
Re 		76
Os 		77
Ir 		78
Pt 		79
Au 		80
Hg 		81
Tl 		82
Pb 		83
Bi 		84
Po 		85
At 		86
Rn
7 87
Fr 		88
Ra 		103
Lr 		104
Rf 		105
Db 		106
Sg 		107
Bh 		108
Hs 		109
Mt 		110
Ds 		111
Rg 		112
Cn 		113
Nh 		114
Fl 		115
Mc 		116
Lv 		117
Ts 		118
Og
8+ 119
Uue 		120
Ubn
57
La 		58
Ce 		59
Pr 		60
Nd 		61
Pm 		62
Sm 		63
Eu 		64
Gd 		65
Tb 		66
Dy 		67
Ho 		68
Er 		69
Tm 		70
Yb
89
Ac 		90
Th 		91
Pa 		92
U 		93
Np 		94
Pu 		95
Am 		96
Cm 		97
Bk 		98
Cf 		99
Es 		100
Fm 		101
Md 		102
No
121
Ubu 		122
Ubb 		124
Ubq 		126
Ubh
periods   groups   blocks
Metal Metalloid Nonmetal
Alkali metal Alkaline earth metal Lanthan­ide Acti­nide Transition metal Post-​transition metal Reactive nonmetal Noble gas

Periodic table by article value

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See also

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