hydrogen

chemical element with symbol H and atomic number 1
Thing chemical_element Q556
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hydrogen

Summary

hydrogen is a chemical element[1]. hydrogen ranks in the top 3% of chemical_element entities by monthly Wikipedia readership (3,519 views/month).[2]

Key Facts

  • hydrogen is credited with the discovery of Henry Cavendish[3].
  • hydrogen is credited with the discovery of Mikhail Lomonosov[4].
  • hydrogen is credited with the discovery of Antoine Lavoisier[5].
  • hydrogen's instance of is recorded as chemical element[6].
  • hydrogen's instance of is recorded as atmophile element[7].
  • water is named after hydrogen[8].
  • hydrogen's location of discovery is recorded as Russian Empire[9].
  • hydrogen's location of discovery is recorded as United Kingdom[10].
  • hydrogen's location of discovery is recorded as France[11].
  • hydrogen's element symbol is recorded as H[12].
  • hydrogen is a type of diatomic nonmetal[13].
  • hydrogen is a type of s-block[14].
  • hydrogen is a type of reducing agent[15].
  • hydrogen is part of period 1[16].
  • hydrogen is part of group 1[17].
  • hydrogen is part of water[18].
  • hydrogen is part of nonmetal[19].
  • hydrogen is used for hydrogen technologies[20].
  • hydrogen is used for hydrogen fuel[21].
  • hydrogen's Commons category is recorded as Hydrogen[22].
  • hydrogen's color is recorded as colorless[23].
  • hydrogen's Unicode character is recorded as 氫[24].
  • hydrogen's crystal system is recorded as hexagonal crystal system[25].
  • hydrogen's time of discovery or invention is recorded as 1766[26].
  • hydrogen's topic's main category is recorded as Category:Hydrogen[27].

Body

Definition and Type

Recorded instance of include chemical element[6] and atmophile element[7]. Recorded subclass of include diatomic nonmetal[13], s-block[14], and reducing agent[15].

Origins

water is named after hydrogen[8].

Use and Application

Recorded has use include hydrogen technologies[20] and hydrogen fuel[21]. Part of include period 1[16], a period[28]; group 1[17], a group[29]; water[18], a type of chemical entity[30]; and nonmetal[19].

Influence

Things named for hydrogen include hycean planet[31], an astronomical object type[32]; hydrogenase[33], a group or class of enzymes[34]; umohoite[35], a mineral species[36]; and caysichite-(Y)[37], a mineral species[38].

Why It Matters

hydrogen ranks in the top 3% of chemical_element entities by monthly Wikipedia readership (3,519 views/month).[2] hydrogen has Wikipedia articles in 30 language editions, a strong signal of global cultural recognition.[39] hydrogen is known by 49 alternative names across languages and contexts.[40]

Entities named for hydrogen include hycean planet[31], an astronomical object type[32]; hydrogenase[33], a group or class of enzymes[34]; umohoite[35], a mineral species[36]; and caysichite-(Y)[37], a mineral species[38].

References

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

Direct Wikidata claims

  1. [6] ↑ . wikidata.org.
  2. [7] ↑ . wikidata.org.
  3. [3] ↑ . wikidata.org.
  4. [4] ↑ . wikidata.org.
  5. [5] ↑ . wikidata.org.
  6. [8] ↑ . wikidata.org.
  7. [9] ↑ . wikidata.org.
  8. [10] ↑ . wikidata.org.
  9. [11] ↑ . wikidata.org.
  10. [12] ↑ . Atomic weights of the elements 2009 (IUPAC Technical Report). wikidata.org.
  11. [13] ↑ . 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] ↑ . wikidata.org.
  19. [21] ↑ . wikidata.org.
  20. [22] ↑ . wikidata.org.
  21. [23] ↑ . wikidata.org.
  22. [24] ↑ . wikidata.org.
  23. [25] ↑ . wikidata.org.
  24. [26] ↑ . wikidata.org.
  25. [27] ↑ . wikidata.org.

Inverse relationships (entities pointing at this one)

  1. [31] ↑ . wikidata.org. → on this site
  2. [33] ↑ . wikidata.org. → on this site
  3. [35] ↑ . wikidata.org. → on this site
  4. [37] ↑ . 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. [30] ↑ . Wikidata. wikidata.org. → on this site
  4. [32] ↑ . Wikidata. wikidata.org. → on this site
  5. [34] ↑ . Wikidata. wikidata.org. → on this site
  6. [36] ↑ . Wikidata. wikidata.org. → on this site
  7. [38] ↑ . 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. [39] ↑ . Wikidata sitelinks. wikidata.org.
  3. [40] ↑ . 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). hydrogen. Retrieved October 3, 2026, from https://4ort.xyz/entity/hydrogen
MLA “hydrogen.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 Oct. 2026, https://4ort.xyz/entity/hydrogen.
BibTeX @misc{4ortxyz_hydrogen_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{hydrogen}}, year = {2026}, url = {https://4ort.xyz/entity/hydrogen}, note = {Accessed: 2026-10-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): hydrogen — https://4ort.xyz/entity/hydrogen (retrieved 2026-10-03)

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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. 12h ago · R1F4T · 2026-10-03 view diff on Wikidata ↗
    P14936 → {'amount': '+53'}, {'unit': 'Q192274', 'amount': '+25'}
    P14937 → {'amount': '+31'}, {'unit': 'Q192274', 'amount': '+31'}
    P14938 → {'amount': '+120'}, {'unit': 'Q192274', 'amount': '+120'}
    Claims rich → —
    "/* wbsetclaim-create:2||1 */ [[Property:P14936]]: 25 picometre, Add sourced atomic radius"
  2. 14h ago · ZI Jony · 2026-10-03 view diff on Wikidata ↗
    P14936 → {'amount': '+53'}, {'unit': 'Q192274', 'amount': '+25'}
    P14937 → {'amount': '+31'}, {'unit': 'Q192274', 'amount': '+31'}
    P14938 → {'amount': '+120'}, {'unit': 'Q192274', 'amount': '+120'}
    Claims rich → —
    "/* wbsetclaim-create:2||1 */ [[Property:P14936]]: 53"
  3. 4d ago · عُثمان · 2026-09-29 view diff on Wikidata ↗
    Equivalent class → http://www.hozo.jp/owl/YAMATO20210808.miz.owl#hydrogen
    Wikipedia languages → ['abstract', 'af', 'als', 'am', 'an', 'ang', 'anp', 'ar', 'ary', 'arz', 'as', 'a
    Sitelink count → 238
    Claims rich → —
    "/* wbsetclaim-create:2||1 */ [[Property:P1709]]: http://www.hozo.jp/owl/YAMATO20210808.miz.owl#hydrogen"
  4. 13d ago · ならちゃん · 2026-09-20 view diff on Wikidata ↗
    Nhk one news topic id → E0000000469
    Crystal system → hexagonal crystal system
    "/* wbsetclaim-create:2||1 */ [[Property:P12036]]: E0000000469"
  5. 14d ago · R1F4T · 2026-09-19 view diff on Wikidata ↗
    Mass → {'unit': 'Q483261', 'amount': '+1.0080'}
    "/* wbsetclaimvalue:1| */ [[Property:P2067]]: 1.008±0.0002 dalton, correct the standard atomic weight to the current CIAAW value"
  6. 28d ago · Baum64 · 2026-09-05 view diff on Wikidata ↗
    Has characteristic → diamagnetism
    Standard molar entropy → {'unit': 'Q20966455', 'amount': '+114.717'}
    Standard enthalpy of formation → {'unit': 'Q752197', 'amount': '+217.998'}
    "/* wbcreateclaim-create:1| */ [[Property:P3078]]: 217.998 kilojoule per mole, [[:toollabs:quickstatements/#/batch/270882|batch #270882]]"
  7. 4w ago · Baum64 · 2026-08-30 view diff on Wikidata ↗
    Subclass of → diatomic nonmetal, s-block, reducing agent
    Part of → period 1, group 1, water +1
    "/* wbremoveclaims-remove:1| */ [[Property:P279]]: [[Q19600]], [[:toollabs:quickstatements/#/batch/269683|batch #269683]]"
  8. 5w ago · Mahirtwofivesix · 2026-08-26 view diff on Wikidata ↗
    Verbaalpina id → C19352
    Interlingual index id → i113946
    Arabic ontology lexical concept id → 151078475
    "/* wbeditentity-statements-multiple-properties-update:0||3 */ added/modified IDs mapped to WordNet 3.1"
  9. 6w ago · Baum64 · 2026-08-16 view diff on Wikidata ↗
    Specific heat capacity → {'unit': 'Q3085309', 'amount': '+14304.0'}
    Cod id → 9011566
    "/* wbcreateclaim-create:1| */ [[Property:P9824]]: 9011566, [[:toollabs:quickstatements/#/batch/269026|batch #269026]]"
  10. 9w ago · Printstream · 2026-07-31 view diff on Wikidata ↗
    P14717 → hydrogen
    "/* wbcreateclaim-create:1| */ [[Property:P14717]]: Q556, #quickstatements; #temporary_batch_1785524324610"
  11. 12w ago · Nyuhn · 2026-07-10 view diff on Wikidata ↗
    P14541 → 3cSt8l
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/40849|batch #40849]]: ZGBK ID"
  12. 15w ago · MariuszRokin · 2026-06-15 view diff on Wikidata ↗
    Eska.pl topic id → tg-F71T-9NdE-PjJH
    "/* wbsetclaim-create:1||1 */ [[Property:P7185]]: tg-F71T-9NdE-PjJH, Matched to [[:toollabs:mix-n-match/#/entry/250723793|wodór (#250723793)]] in [[:toollabs:mix-n-match/#/catalog/7420|eska.pl topic]] "
  13. 16w ago · Schekinov Alexey Victorovich · 2026-06-12 view diff on Wikidata ↗
    Described by source → Armenian Soviet Encyclopedia, Hydrogen, Encyclopædia Britannica 11th edition +4
    "/* wbsetclaim-create:2||1 */ [[Property:P1343]]: [[Q4114391]]"
  14. 16w ago · Jindřich Rubeš · 2026-06-12 view diff on Wikidata ↗
    Svkkl authority id → 0216863-vodik
    "/* wbcreateclaim-create:1| */ [[Property:P9322]]: 0216863-vodik, [[:toollabs:quickstatements/#/batch/259496|batch #259496]]"
  15. 19w ago · Twofivesixbot bot · 2026-05-23 view diff on Wikidata ↗
    Great norwegian encyclopedia id → hydrogen, vannstoff
    "/* wbsetclaim-update-qualifiers:1||1|3 */ [[Property:P8189]]: 987007533741005171, mv to monolingual text names on J9U statements"
  16. 19w ago · Infovarius · 2026-05-18 view diff on Wikidata ↗
    Has use → hydrogen technologies, hydrogen fuel
    "/* wbsetclaim-create:2||1 */ [[Property:P366]]: [[Q11549077]]"
  17. 20w ago · Snipre · 2026-05-16 view diff on Wikidata ↗
    Subclass of → diatomic nonmetal, s-block, reducing agent
    "/* wbremoveclaims-remove:1| */ [[Property:P279]]: [[Q42501]]"
  18. 20w ago · Ponor · 2026-05-16 view diff on Wikidata ↗
    Hrvatska enciklopedija id → vodik
    "/* wbsetclaim-create:2||1 */ [[Property:P7982]]: vodik"
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