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This WikiProject has managed to standardize the articles on the known chemical elements (see Guidelines page). Now it is aimed at the maintenance of these at an agreed upon format discussed in Wikipedia talk:WikiProject Elements and at the expansion and improvement of each article to featured article quality (check out our Goals below). See also WikiProject Isotopes. For a complete list of articles covered, including talk pages and templates, click here. To see all articles covered, but not talk pages and templates, see the periodic table by quality.

TOC: Announcements – Achievements – Goals – Periodic table – Article alerts – Popular pages – Elements report

Announcements

21	21 Featured Content items:. Featured Articles (18) H, He, O, Ti, Zn, Ge, Y, Nb, Tc, Xe, Cs, Ir, Fr, U, Pu, Cf, Uuo, Noble gas Featured Lists (1) Periodic table (large version) Featured Topics (2) Noble gases, Period 1 elements Signpost interview edit - detailed list - other high quality articles

Periodic table by the quality of the articles on each chemical element. (dark blue for FA, dark green for GA, light blue for A, light green for B, yellow for C and orange for Start)

 · view · watch · refresh · edit · history · Archive

Current FACs, FARs, GANs, GARs, PRs, AIDs or similar activities

• Compounds of berkelium is a good article nominee.
• Boron has been put up for good article reassessment.

Current Article Improvement Drives and Adoptions

Hot articles

14 edits	Period 5 element
12 edits	Meitnerium
11 edits	Aluminium-26
10 edits	Erbium
10 edits	Lutetium
9 edits	Thorium
8 edits	Chemical element
8 edits	Radium
5 edits	Metal
5 edits	Plutonium

These are the articles that have been edited the most within the last three days. This section is updated daily.

Achievements

Successful FACs, FARs, GANs, GARs, or milestones

• Promethium became a good article on February 27, 2012.
• Alkali metal has gone through a peer review on February 13, 2012.
• On February 12, 2012 all group, period and known element articles have been de-stubbed!
• Periodic table has gone through a peer review on January 17, 2012 and was brought to B-class standards.
• Alkali metal became a good article on December 2, 2011.
• Astatine became a good article on November 2, 2011.
• Lutetium became a good article on September 10, 2011.
• Sulfur has gone through a peer review on August 31, 2011.
• Europium became a good article on August 15, 2011.
• Actinium became a good article on August 12, 2011.
• Actinide became a good article on July 26, 2011.
• Californium was today's featured article on July 21, 2011.
• Group 3 element became a good article on July 7, 2011.
• Carbon became a good article on July 6, 2011.
• Californium became a featured article on July 4, 2011.

Older achievements

Periodic table by quality

Periodic table
Chemical element
Group #	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18
Period
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	*	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	**	104 Rf	105 Db	106 Sg	107 Bh	108 Hs	109 Mt	110 Ds	111 Rg	112 Cn	113 Uut	114 Uuq	115 Uup	116 Uuh	117 Uus	118 Uuo
8	119 Uue	120 Ubn	***
*Lanthanides			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	71 Lu
**Actinides			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	103 Lr
***Superactinides			121 Ubu	122 Ubb	124 Ubq	126 Ubh	137 Uts											link here

FA

A

GA

Bplus

B

C

Start

Goals

Short term

1. Bring group 12 element and sodium to GA-class to make the group 12 elements and the alkali metals respectively good topics.
2. Bring all the remaining C-class Top-importance articles (bromine, calcium, chlorine, iodine, lead, selenium, silicon, sodium, sulfur) to B-class or above.
3. Bring all discovered elements Start-class articles (cerium, erbium, holmium, lawrencium, nobelium, praseodymium) to C-class standard or above.
4. Get s-block and p-block to Start-class or above.

Mid term

1. Work on actinides and period 2 element to make them good topics.
2. Bring the rest of the vital articles (aluminium, chemical element, gold, iron, nitrogen, periodic table, silicon, silver, sulfur) to GA-class or above.
3. Add pictures for infoboxes for the remaining five (promethium, astatine, francium, actinium and fermium) of the first 100 elements which currently do not have an image of them in pure form.
4. Bring all the other articles to C-class standard or above. (125/158 = 79% as of Dec 2011)

Longer term

1. Bring all the remaining vital articles to FA standard (2/12 = 17% as of Dec 2011).
2. Bring all articles marked as Top- and High-importance on the article subpage to GA-class standard or above.
3. Bring all the other articles to B-class or above. (90/158 = 57% as of Dec 2011)

Bridge to ultimate goals

1. Bring all the remaining Top- and High-importance articles to FA-standard (8/48 = 17% as of Dec 2011)
2. Bring all the other articles to GA-class or above (turn the "Periodic Table by Quality" completely dark green and blue). (70/158 = 44% as of Dec 2011)

Ultimate goals

1. Bring all element and supporting articles to FA standard (turn the "Periodic Table by Quality" completely blue). (17/158 = 11% as of Dec 2011)

Periodic table

Group #	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18
Period
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	*	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	**	104 Rf	105 Db	106 Sg	107 Bh	108 Hs	109 Mt	110 Ds	111 Rg	112 Cn	113 Uut	114 Uuq	115 Uup	116 Uuh	117 Uus	118 Uuo
* Lanthanides (Lanthanoids)			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	71 Lu
** Actinides (Actinoids)			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	103 Lr

This common arrangement of the periodic table separates the lanthanides (lanthanoids) and actinides (actinoids) (the f-block) from other elements. The wide periodic table incorporates the f-block. The extended periodic table adds the 8th and 9th periods, incorporating the f-block and adding the theoretical g-block.

Element categories in the periodic table Metals Metalloids Nonmetals Unknown chemical properties Alkali metals Alkaline earth metals Inner transition metals Transition metals Post-transition metals Other non-metals Halogens Noble gases Lanthanides Actinides
Atomic number colors show state of matter at standard conditions (0 °C and 1 atm): Solids Liquids Gases Unknown	Borders show natural occurrence: Primordial From decay Synthetic

Isotope tables

These tables are collections of links to all likely articles about isotopes and metastable isotopes. Perhaps this can be turned into articles eventually, but for now this is for internal use. "Likely" is defined as anything present in list of isotopes articles as of 29 March 2009. Contact Headbomb for questions about these lists, or for their maintenance.

• /Isotope tables/Element 1-10
• /Isotope tables/Element 11-20
• /Isotope tables/Element 21-30
• /Isotope tables/Element 31-40
• /Isotope tables/Element 41-50

• /Isotope tables/Element 51-60
• /Isotope tables/Element 61-70
• /Isotope tables/Element 71-80
• /Isotope tables/Element 81-90
• /Isotope tables/Element 91-100

• /Isotope tables/Element 101-110
• /Isotope tables/Element 111-118

Article alerts

Good article nominees

• 21 Feb 2012 – Compounds of berkelium (talk · edit · hist) was GA nominated by Double sharp (t · c); start discussion
• 10 Feb 2012 – Promethium (talk · edit · hist) GA nominated by R8R Gtrs (t · c) was promoted, see discussion

Good article reviews

• 06 Jan 2012 – Boron (talk · edit · hist) was nominated for GA review by StringTheory11 (t · c); see discussion

Peer reviews

• 26 Feb 2012 – Period 8 element (talk · edit · hist) has been put up for PR by Double sharp (t · c); see discussion
• 25 Feb 2012 – Group 12 element (talk · edit · hist) has been put up for PR by Nergaal (t · c); see discussion
• 13 Jan 2012 – Alkali metal (talk · edit · hist) put up for PR by Double sharp (t · c) was closed; see discussion
• 18 Dec 2011 – Periodic table (talk · edit · hist) put up for PR by StringTheory11 (t · c) was closed; see discussion

External links

• Wikiproject Watchlist - WikiProject Elements