caesium

chemical element with symbol Cs and atomic number 55
Thing chemical_element Q1108
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caesium

Summary

caesium is a chemical element[1]. caesium draws 1,094 Wikipedia views per month (chemical_element category, ranking #47 of 144).[2]

Key Facts

  • caesium is credited with the discovery of Robert Bunsen[3].
  • caesium is credited with the discovery of Gustav Kirchhoff[4].
  • caesium's instance of is recorded as chemical element[5].
  • caesium's instance of is recorded as lithophile[6].
  • caesium's instance of is recorded as active metal[7].
  • sky blue is named after caesium[8].
  • caesium's location of discovery is recorded as Heidelberg[9].
  • caesium's canonical SMILES is recorded as [Cs][10].
  • caesium's element symbol is recorded as Cs[11].
  • caesium's chemical formula is recorded as Cs[12].
  • caesium is a type of alkali metal[13].
  • caesium is a type of s-block[14].
  • caesium is a type of light metal[15].
  • caesium is part of group 1[16].
  • caesium is part of period 6[17].
  • caesium is part of alkali metal[18].
  • caesium's Commons category is recorded as Caesium[19].
  • caesium's Unicode character is recorded as 銫[20].
  • caesium's crystal system is recorded as body-centered cubic[21].
  • caesium's time of discovery or invention is recorded as January 1, 1860[22].
  • caesium's IPA transcription is recorded as ˈsiːziəm[23].
  • caesium's topic's main category is recorded as Category:Caesium[24].
  • caesium's Commons gallery is recorded as Caesium[25].
  • caesium's atomic number is recorded as {'amount': '+55'}[26].
  • caesium's Mohs' hardness is recorded as {'amount': '+0.2'}[27].

Body

Definition and Type

Recorded instance of include chemical element[5], lithophile[6], and active metal[7]. Recorded subclass of include alkali metal[13], s-block[14], and light metal[15].

Origins

sky blue is named after caesium[8].

Use and Application

Part of include group 1[16], a group[28]; period 6[17], a period[29]; and alkali metal[18].

Influence

Things named for caesium include CesiumJS[30], a software[31].

Why It Matters

caesium draws 1,094 Wikipedia views per month (chemical_element category, ranking #47 of 144).[2] caesium has Wikipedia articles in 30 language editions, a strong signal of global cultural recognition.[32] caesium is known by 72 alternative names across languages and contexts.[33]

Entities named for caesium include CesiumJS[30], a software[31].

References

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

Direct Wikidata claims

  1. [5] ↑ . wikidata.org.
  2. [6] ↑ . wikidata.org.
  3. [7] ↑ . wikidata.org.
  4. [3] ↑ . Nature's Building Blocks An A-Z Guide of the Elements New Edition. Retrieved . archive.org. Provenance: wikidata.org.
  5. [4] ↑ . Nature's Building Blocks An A-Z Guide of the Elements New Edition. Retrieved . wikidata.org.
  6. [8] ↑ . wikidata.org.
  7. [9] ↑ . Nature's Building Blocks An A-Z Guide of the Elements New Edition. wikidata.org.
  8. [10] ↑ . PubChem. Retrieved . wikidata.org.
  9. [11] ↑ . Atomic weights of the elements 2009 (IUPAC Technical Report). wikidata.org.
  10. [12] ↑ . PubChem. Retrieved . wikidata.org.
  11. [13] ↑ . periodic table. wikidata.org.
  12. [14] ↑ . wikidata.org.
  13. [15] ↑ . wikidata.org.
  14. [16] ↑ . wikidata.org.
  15. [17] ↑ . wikidata.org.
  16. [18] ↑ . wikidata.org.
  17. [19] ↑ . wikidata.org.
  18. [20] ↑ . cns11643.gov.tw. Retrieved . cns11643.gov.tw. Provenance: wikidata.org.
  19. [21] ↑ . wikidata.org.
  20. [22] ↑ . Nature's Building Blocks An A-Z Guide of the Elements New Edition. wikidata.org.
  21. [23] ↑ . wikidata.org.
  22. [24] ↑ . wikidata.org.
  23. [25] ↑ . wikidata.org.
  24. [26] ↑ . Nature's Building Blocks An A-Z Guide of the Elements New Edition. wikidata.org.
  25. [27] ↑ . wikidata.org.

Inverse relationships (entities pointing at this one)

  1. [30] ↑ . 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

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [32] ↑ . Wikidata sitelinks. wikidata.org.
  3. [33] ↑ . 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). caesium. Retrieved October 3, 2026, from https://4ort.xyz/entity/caesium
MLA “caesium.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 Oct. 2026, https://4ort.xyz/entity/caesium.
BibTeX @misc{4ortxyz_caesium_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{caesium}}, year = {2026}, url = {https://4ort.xyz/entity/caesium}, note = {Accessed: 2026-10-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): caesium — https://4ort.xyz/entity/caesium (retrieved 2026-10-03)

Canonical URL: https://4ort.xyz/entity/caesium · Last refreshed:

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. 13h ago · R1F4T · 2026-10-03 view diff on Wikidata ↗
    P14936 → {'unit': 'Q192274', 'amount': '+260'}
    Wikipedia languages → ['af', 'am', 'an', 'anp', 'ar', 'ary', 'arz', 'ast', 'az', 'ba', 'ban', 'bcl', '
    P14937 → {'unit': 'Q192274', 'amount': '+244'}
    Claims rich → —
    "/* wbsetclaim-create:2||1 */ [[Property:P14936]]: 260 picometre, Add sourced P14936 element radius"
  2. 7d ago · KrBot bot · 2026-09-26 view diff on Wikidata ↗
    Zvg number → 7550
    "/* wbsetclaimvalue:1| */ [[Property:P679]]: 7550, см. / see [[Template:Autofix|autofix]] на / on [[Property talk:P679]]"
  3. 10d ago · Mrwdat3 · 2026-09-23 view diff on Wikidata ↗
    Zvg number → 7550
    "/* wbcreateclaim-create:1| */ [[Property:P679]]: 007550, [[:toollabs:quickstatements/#/batch/275042|batch #275042]]"
  4. 14d ago · R1F4T · 2026-09-19 view diff on Wikidata ↗
    Crystal system → body-centered cubic
    "/* wbsetclaim-create:2||1 */ [[Property:P556]]: [[Q851536]], add crystal system from en:Template:Infobox element"
  5. 14d ago · R1F4T · 2026-09-19 view diff on Wikidata ↗
    Oxidation state → {'amount': '+1'}, {'amount': '-1'}
    "/* wbsetclaim-create:2||1 */ [[Property:P1121]]: −1, add oxidation state from en:Template:Infobox element/symbol-to-oxidation-state"
  6. 14d ago · R1F4T · 2026-09-19 view diff on Wikidata ↗
    Ipa transcription → ˈsiːziəm
    "/* wbsetclaim-create:2||1 */ [[Property:P898]]: ˈsiːziəm, add IPA transcription (from en:Template:Infobox element/symbol-to-pronunciation)"
  7. 14d ago · R1F4T · 2026-09-19 view diff on Wikidata ↗
    Pronunciation audio → LL-Q1860 (eng)-Naomi Persephone Amethyst (NaomiAmethyst)-cae
    "/* wbsetclaim-create:2||1 */ [[Property:P443]]: LL-Q1860 (eng)-Naomi Persephone Amethyst (NaomiAmethyst)-caesium.wav, add English pronunciation audio (Lingua Libre, from en:Template:Infobox element/sy"
  8. 14d ago · R1F4T · 2026-09-19 view diff on Wikidata ↗
    Electron configuration → [Xe] 6s¹, 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s¹
    "/* wbsetclaimvalue:1| */ [[Property:P8000]]: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s¹, correct electron configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 4d¹⁰ 4p⁶ 5s² 5d¹⁰ 5p⁶ 6s¹ → 1s² 2s² 2p⁶ 3s² 3p⁶ "
  9. 28d ago · Baum64 · 2026-09-05 view diff on Wikidata ↗
    Linear thermal expansion coefficient → {'unit': 'Q56025776', 'amount': '+92.6'}
    Standard enthalpy of formation → {'unit': 'Q752197', 'amount': '+76.5'}, {'unit': 'Q752197', 'amount': '+2.09'}
    "/* wbcreateclaim-create:1| */ [[Property:P3078]]: 76.5 kilojoule per mole, [[:toollabs:quickstatements/#/batch/270882|batch #270882]]"
  10. 5w ago · Baum64 · 2026-08-29 view diff on Wikidata ↗
    Subclass of → alkali metal, s-block, light metal
    "/* wbcreateclaim-create:1| */ [[Property:P279]]: [[Q428766]], [[:toollabs:quickstatements/#/batch/269657|batch #269657]]"
  11. 5w ago · Mahirtwofivesix · 2026-08-26 view diff on Wikidata ↗
    Babelnet id → 00006885n
    Density → {'unit': 'Q844211', 'amount': '+1900.0'}
    Thermal conductivity → {'unit': 'Q1463969', 'amount': '+36.0'}
    Electrical conductivity → {'unit': 'Q80842107', 'amount': '+4760000.0'}
    + 3 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-statements-multiple-properties-update:0||4 */ added/modified IDs mapped to WordNet 3.1"
  12. 6w ago · Baum64 · 2026-08-16 view diff on Wikidata ↗
    Melting point → {'unit': 'Q11579', 'amount': '+301.66'}
    Cod id → 9011641
    "/* wbcreateclaim-create:1| */ [[Property:P9824]]: 9011641, [[:toollabs:quickstatements/#/batch/269026|batch #269026]]"
  13. 12w ago · Nyuhn · 2026-07-10 view diff on Wikidata ↗
    P14541 → 2FdmJF
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/40849|batch #40849]]: ZGBK ID"
  14. 19w ago · Twofivesixbot bot · 2026-05-17 view diff on Wikidata ↗
    Hrvatska enciklopedija id → cezij
    "/* wbsetclaim-update-qualifiers:1||1|4 */ [[Property:P2347]]: 16504, mv to monolingual text names on YSO statements"
  15. 20w ago · Ponor · 2026-05-16 view diff on Wikidata ↗
    Hrvatska enciklopedija id → cezij
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/31836|batch #31836]]: Hrvatska enciklopedija"
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