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description: a species of atoms having the same number of protons in the atomic nucleus

Useful links
Classification of the class chemical element (Q11344) View with Reasonator View with SQID
For help about classification, see Wikidata:Classification.
parent classes (classes of items which contain this one item) 
subclasses (classes which contain special kinds of items of this class)
<chemical element> on wikidata tree visualisation (external tool)(depth=1)
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listing of subclasses, number of super and subclasses, properties of the instances: <chemical element> on Miga
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Data to provide for this type of item
Property Data type description required
instance of (P31) Item that class of which this subject is a particular example and member (subject typically an individual member with a proper name label); different from P279; using this property as a qualifier is deprecated—use P2868 or P3831 instead . Possible values: chemical element (Q11344) yes
element symbol (P246) String identifier for a chemical element yes
atomic number (P1086) Quantity number of protons found in the nucleus of the atom yes
electronegativity (P1108) Quantity tendency of an atom or functional group to attract electrons no
image (P18) Commons media file image of relevant illustration of the subject; if available, use more specific properties (sample: coat of arms image, locator map, flag image, signature image, logo image, collage image); only images which exist on Wikimedia Commons are acceptable no
year of taxon name publication (P574) Point in time year when this scientific name was formally established no
color (P462) Item color of subject no
magnetic ordering (P922) Item magnetic ordering of a substance no
InChIKey (P235) External identifier A hashed version of the full standard InChI - designed to create an identifier that encodes structural information and can also be practically used in web searching. no
canonical SMILES (P233) String Simplified Molecular Input Line Entry Specification (canonical format) no
UNII (P652) External identifier identifier issued by the FDA / Unique Ingredient Identifier no


Wikidata:Project_chat/Archive/2014/05#chemical_element_.28Q11344.29_instance_of+.28P31.29.2C_subclass_of+.28P279.29_and_part_of+.28P361.29 Tamawashi (talk) 05:00, 12 July 2014 (UTC)


химический элемент - подмножество множества химические элементы (=периодическая система химических элементов Q10693) --Fractaler (talk) 07:57, 17 August 2016 (UTC)


Merge? --Fractaler (talk) 13:52, 10 October 2016 (UTC)

Delete. author  TomT0m / talk page 17:16, 10 October 2016 (UTC)
Concur. Note also Q17327503. Tortoise0308 (talk) 14:18, 26 November 2016 (UTC)
I see. For example, nitrogen (Q627): period 2 (Q207712) consists of Q17327503; group 15 (Q106675) consists of Q17327492 --Fractaler (talk) 15:50, 26 November 2016 (UTC)
Useless, redundant. In the periodic table, "Group" is a classification. It is enough to claim: nitrogen (Q627) is classified as being in group 2 (and so is a 'member of' group 2). Aggregating, this already lists "members of group 2", and next up "members of a group".
Listing 'Element of a specific group' is no new information. (Also note the 'specific'?!; are there members of non-specific groups?). 'Element of a specific group' is exactly the same as the aggregate 'Members of groups', which is automatically provided. -DePiep (talk) 11:52, 29 January 2017 (UTC)
nitrogen (Q627) is homonym (Q160843) and = 1) Q17327492 and =2) Q17327503. The mathematica model is: nitrogen (Q627) = point (Q44946) on Cartesian coordinate system (Q62912) (2D). Q17327492 (or Q17327503) is point on line (Q37105) (1D). So nitrogen (Q627) = intersection (Q185837) (Q17327492 + Q17327503)

A compound or a substance?[edit]

If I understand the definition of a en:Chemical compound well, a chemical element does not qualify because there are no multiple elements involved. I think it should be chemical substance (Q79529). -DePiep (talk) 11:55, 29 January 2017 (UTC)