calcium

chemical element with symbol Ca and atomic number 20
Thing chemical_element Q706
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calcium

Summary

calcium is a chemical element[1]. calcium draws 133 Wikipedia views per month (chemical_element category, ranking #50 of 144).[2]

Key Facts

  • calcium is credited with the discovery of Humphry Davy[3].
  • calcium's instance of is recorded as chemical element[4].
  • calcium's instance of is recorded as lithophile[5].
  • calcium's instance of is recorded as active metal[6].
  • lime is named after calcium[7].
  • calcium's canonical SMILES is recorded as [Ca][8].
  • calcium's element symbol is recorded as Ca[9].
  • calcium's chemical formula is recorded as Ca[10].
  • calcium is a type of alkaline earth metal[11].
  • calcium is a type of light metal[12].
  • calcium is a type of s-block[13].
  • calcium is part of period 4[14].
  • calcium is part of alkaline earth metal[15].
  • calcium is used for essential medicine[16].
  • calcium's Commons category is recorded as Calcium[17].
  • calcium's Unicode character is recorded as 鈣[18].
  • calcium's crystal system is recorded as face-centered cubic[19].
  • calcium's time of discovery or invention is recorded as 1808[20].
  • calcium's found in taxon is recorded as Foeniculum vulgare[21].
  • calcium's found in taxon is recorded as cacao[22].
  • calcium's found in taxon is recorded as Chlorella pyrenoidosa[23].
  • calcium's found in taxon is recorded as Chlorella vulgaris[24].
  • calcium's found in taxon is recorded as Auxenochlorella pyrenoidosa[25].
  • calcium's found in taxon is recorded as Euphorbia lancifolia[26].
  • calcium's found in taxon is recorded as Montanoa tomentosa[27].

Body

Definition and Type

Recorded instance of include chemical element[4], lithophile[5], and active metal[6]. Recorded subclass of include alkaline earth metal[11], light metal[12], and s-block[13].

Origins

lime is named after calcium[7].

Use and Application

calcium is used for essential medicine[16]. Part of include period 4[14], a period[28] and alkaline earth metal[15], a group[29].

Influence

Things named for calcium include cavansite[30], a mineral species[31]; calclacite[32], a mineral species[33]; Calcium[34], a census-designated place in the United States[35], in United States[36]; canasite[37], a mineral species[38]; barytocalcite[39], a mineral species[40]; gismondine-Ca[41], a mineral species[42]; cafarsite[43], a mineral species[44]; and chlorocalcite[45], a mineral species[46].

Why It Matters

calcium draws 133 Wikipedia views per month (chemical_element category, ranking #50 of 144).[2] calcium has Wikipedia articles in 30 language editions, a strong signal of global cultural recognition.[47] calcium is known by 65 alternative names across languages and contexts.[48]

Entities named for calcium include cavansite[30], a mineral species[31]; calclacite[32], a mineral species[33]; Calcium[34], a census-designated place in the United States[35], in United States[36]; canasite[37], a mineral species[38]; barytocalcite[39], a mineral species[40]; and gismondine-Ca[41], a mineral species[42].

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [4] ↑ . wikidata.org.
  2. [5] ↑ . wikidata.org.
  3. [6] ↑ . wikidata.org.
  4. [3] ↑ . wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . PubChem. Retrieved . wikidata.org.
  7. [9] ↑ . Atomic weights of the elements 2009 (IUPAC Technical Report). wikidata.org.
  8. [10] ↑ . PubChem. Retrieved . wikidata.org.
  9. [11] ↑ . wikidata.org.
  10. [12] ↑ . wikidata.org.
  11. [13] ↑ . wikidata.org.
  12. [14] ↑ . wikidata.org.
  13. [15] ↑ . wikidata.org.
  14. [16] ↑ . wikidata.org.
  15. [17] ↑ . wikidata.org.
  16. [18] ↑ . cns11643.gov.tw. Retrieved . cns11643.gov.tw. Provenance: wikidata.org.
  17. [19] ↑ . wikidata.org.
  18. [20] ↑ . wikidata.org.
  19. [21] ↑ . Effect of oral administration of fennel (Foeniculum vulgare) on ciprofloxacin absorption and disposition in the rat. wikidata.org.
  20. [22] ↑ . Constituents of Cocoa Husks. wikidata.org.
  21. [23] ↑ . Preventing dyslipidemia by Chlorella pyrenoidosa in rats and hamsters after chronic high fat diet treatment. wikidata.org.
  22. [24] ↑ . Preventing dyslipidemia by Chlorella pyrenoidosa in rats and hamsters after chronic high fat diet treatment. wikidata.org.
  23. [25] ↑ . Preventing dyslipidemia by Chlorella pyrenoidosa in rats and hamsters after chronic high fat diet treatment. wikidata.org.
  24. [26] ↑ . A neglected Mayan galactagogue - ixbut (Euphorbia lancifolia).. wikidata.org.
  25. [27] ↑ . The zoapatle III--biological and uterotonic properties of aqueous plant extract. wikidata.org.

Inverse relationships (entities pointing at this one)

  1. [30] ↑ . wikidata.org. → on this site
  2. [32] ↑ . wikidata.org. → on this site
  3. [34] ↑ . wikidata.org. → on this site
  4. [37] ↑ . wikidata.org. → on this site
  5. [39] ↑ . wikidata.org. → on this site
  6. [41] ↑ . wikidata.org. → on this site
  7. [43] ↑ . wikidata.org. → on this site
  8. [45] ↑ . wikidata.org. → on this site

Inline context (facts about related entities)

  1. [28] ↑ . Wikidata. wikidata.org. → on this site
  2. [29] ↑ . Wikidata. wikidata.org. → on this site
  3. [31] ↑ . Wikidata. wikidata.org. → on this site
  4. [33] ↑ . Wikidata. wikidata.org. → on this site
  5. [35] ↑ . Wikidata. wikidata.org. → on this site
  6. [36] ↑ . Wikidata. wikidata.org. → on this site
  7. [38] ↑ . Wikidata. wikidata.org. → on this site
  8. [40] ↑ . Wikidata. wikidata.org. → on this site
  9. [42] ↑ . Wikidata. wikidata.org. → on this site
  10. [44] ↑ . Wikidata. wikidata.org. → on this site
  11. [46] ↑ . Wikidata. wikidata.org. → on this site

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [47] ↑ . Wikidata sitelinks. wikidata.org.
  3. [48] ↑ . Wikidata aliases. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). calcium. Retrieved October 4, 2026, from https://4ort.xyz/entity/calcium
MLA “calcium.” 4ort.xyz Knowledge Graph, 4ort.xyz, 4 Oct. 2026, https://4ort.xyz/entity/calcium.
BibTeX @misc{4ortxyz_calcium_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{calcium}}, year = {2026}, url = {https://4ort.xyz/entity/calcium}, note = {Accessed: 2026-10-04}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): calcium — https://4ort.xyz/entity/calcium (retrieved 2026-10-04)

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Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 1d ago · R1F4T · 2026-10-03 view diff on Wikidata ↗
    P14936 → {'unit': 'Q192274', 'amount': '+180'}
    Sitelink count → 183
    Wikipedia languages → ['abstract', 'af', 'am', 'an', 'anp', 'ar', 'ary', 'arz', 'ast', 'awa', 'az', 'a
    P14937 → {'unit': 'Q192274', 'amount': '+176'}
    + 1 other property edited (see Wikidata diff for full list)
    "/* wbsetclaim-create:2||1 */ [[Property:P14936]]: 180 picometre, Add sourced atomic radius"
  2. 9d ago · KrBot bot · 2026-09-26 view diff on Wikidata ↗
    Zvg number → 8160
    "/* wbsetclaimvalue:1| */ [[Property:P679]]: 8160, см. / see [[Template:Autofix|autofix]] на / on [[Property talk:P679]]"
  3. 11d ago · Mrwdat3 · 2026-09-23 view diff on Wikidata ↗
    Zvg number → 8160
    "/* wbcreateclaim-create:1| */ [[Property:P679]]: 008160, [[:toollabs:quickstatements/#/batch/275042|batch #275042]]"
  4. 15d ago · R1F4T · 2026-09-19 view diff on Wikidata ↗
    Crystal system → face-centered cubic
    "/* wbsetclaim-create:2||1 */ [[Property:P556]]: [[Q3006714]], add crystal system from en:Template:Infobox element"
  5. 16d ago · R1F4T · 2026-09-18 view diff on Wikidata ↗
    Subclass of → alkaline earth metal, light metal, s-block
    "/* wbsetclaim-create:2||1 */ [[Property:P279]]: [[Q208106]], add periodic table block (IUPAC 2021 convention)"
  6. 16d ago · R1F4T · 2026-09-18 view diff on Wikidata ↗
    Mohs' hardness → {'amount': '+1.75'}
    Standard enthalpy of formation → {'unit': 'Q752197', 'amount': '+177.8'}, {'unit': 'Q752197', 'amount': '+7.79'}
    Has characteristic → paramagnetism
    Ionization energy → {'unit': 'Q83327', 'amount': '+6.113154921'}, {'unit': 'Q83327', 'amount': '+11.871719'}, {'unit': 'Q83327', 'amount': '+50.91316'}
    + 1 other property edited (see Wikidata diff for full list)
    "/* wbeditentity-statements-single-property-add:1||3 */ [[Property:P2260]], import ionization energy from NIST Atomic Spectra Database"
  7. 29d ago · Baum64 · 2026-09-05 view diff on Wikidata ↗
    Standard enthalpy of formation → {'unit': 'Q752197', 'amount': '+177.8'}, {'unit': 'Q752197', 'amount': '+7.79'}
    "/* wbcreateclaim-create:1| */ [[Property:P3078]]: 177.8 kilojoule per mole, [[:toollabs:quickstatements/#/batch/270882|batch #270882]]"
  8. 5w ago · Baum64 · 2026-08-29 view diff on Wikidata ↗
    Subclass of → alkaline earth metal, light metal, s-block
    "/* wbcreateclaim-create:1| */ [[Property:P279]]: [[Q428766]], [[:toollabs:quickstatements/#/batch/269657|batch #269657]]"
  9. 5w ago · Mahirtwofivesix · 2026-08-26 view diff on Wikidata ↗
    Interlingual index id → i113911
    Arabic ontology lexical concept id → 151078440
    Found in taxon → Foeniculum vulgare, cacao, Chlorella pyrenoidosa +11
    "/* wbeditentity-statements-multiple-properties-update:0||3 */ added/modified IDs mapped to WordNet 3.1"
  10. 7w ago · KrBot bot · 2026-08-17 view diff on Wikidata ↗
    Electrical resistivity → {'unit': 'Q1441459', 'amount': '+0.0000000336'}
    Speed of sound → {'unit': 'Q182429', 'amount': '+3810.0'}
    "/* wbsetreference-set:2| */ [[Property:P5668]]: 17,224,000,000.0 pascal"
  11. 7w ago · Baum64 · 2026-08-16 view diff on Wikidata ↗
    Poisson's ratio → {'amount': '+0.31'}
    Specific heat capacity → {'unit': 'Q3085309', 'amount': '+647.3'}
    Bulk modulus → {'unit': 'Q44395', 'amount': '+17224000000.0'}
    Shear modulus → {'unit': 'Q44395', 'amount': '+7495000000.0'}
    + 3 other properties edited (see Wikidata diff for full list)
    "/* wbcreateclaim-create:1| */ [[Property:P9824]]: 9011033, [[:toollabs:quickstatements/#/batch/269026|batch #269026]]"
  12. 12w ago · Nyuhn · 2026-07-10 view diff on Wikidata ↗
    P14541 → 47j9Rp
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/40849|batch #40849]]: ZGBK ID"
  13. 13w ago · Veracious · 2026-07-02 view diff on Wikidata ↗
    Ausnut food id → 14B10172
    "/* wbsetclaim-create:1||1 */ [[Property:P2759]]: 14B10172, Matched to [[:toollabs:mix-n-match/#/entry/76203402|Calcium (#76203402)]] in [[:toollabs:mix-n-match/#/catalog/2557|AUSNUT food ID]] #mix'n'm"
  14. 20w ago · Ponor · 2026-05-16 view diff on Wikidata ↗
    Electrical conductivity → {'unit': 'Q20966435', 'amount': '+28200000'}
    Discoverer or inventor → Humphry Davy
    Subclass of → alkaline earth metal, light metal, s-block
    Topic's main category → Category:Calcium
    + 25 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/31836|batch #31836]]: Hrvatska enciklopedija"
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