radical

atom, molecule, or ion that has an unpaired valence electron; typically highly reactive
ChemicalSubstance structural_class_of_chemical_entities Q185056
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radical

Summary

radical is a structural class of chemical entities[1]. radical ranks in the top 5% of structural_class_of_chemical_entities entities by monthly Wikipedia readership (1,588 views/month).[2]

Key Facts

  • radical's instance of is recorded as structural class of chemical entities[3].
  • radical is a type of molecular entity[4].
  • radical is a type of reaction intermediate[5].
  • radical is a type of reactive intermediate[6].
  • radical's Commons category is recorded as Radicals[7].
  • radical comprises unpaired electron[8].
  • radical's topic's main category is recorded as Category:Free radicals[9].
  • radical's described by source is recorded as Brockhaus and Efron Encyclopedic Dictionary[10].
  • radical's described by source is recorded as Small Brockhaus and Efron Encyclopedic Dictionary[11].
  • radical's described by source is recorded as Armenian Soviet Encyclopedia, vol. 1[12].
  • radical's participant in is recorded as free-radical reaction[13].
  • radical's used by is recorded as radical substitution[14].
  • radical's used by is recorded as free-radical addition[15].
  • radical's has characteristic is recorded as reactivity[16].
  • radical's different from is recorded as substituent group[17].
  • radical's different from is recorded as moiety[18].
  • radical's different from is recorded as functional group[19].
  • radical's on focus list of Wikimedia project is recorded as Wikipedia:Vital articles/Level/4[20].

Why It Matters

radical ranks in the top 5% of structural_class_of_chemical_entities entities by monthly Wikipedia readership (1,588 views/month).[2] radical has Wikipedia articles in 30 language editions, a strong signal of global cultural recognition.[21] radical is known by 81 alternative names across languages and contexts.[22]

References

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

Direct Wikidata claims

  1. [3] ↑ . Glossary of Class Names of Organic Compounds and Reactive Intermediates Based on Structure (IUPAC Recommendations 1995). wikidata.org.
  2. [4] ↑ . Glossary of Class Names of Organic Compounds and Reactive Intermediates Based on Structure (IUPAC Recommendations 1995). goldbook.iupac.org. Provenance: wikidata.org.
  3. [5] ↑ . wikidata.org.
  4. [6] ↑ . wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . wikidata.org.
  7. [9] ↑ . wikidata.org.
  8. [10] ↑ . 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] ↑ . goldbook.iupac.org. goldbook.iupac.org. Provenance: wikidata.org.
  16. [18] ↑ . wikidata.org.
  17. [19] ↑ . wikidata.org.
  18. [20] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [21] ↑ . Wikidata sitelinks. wikidata.org.
  3. [22] ↑ . 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). radical. Retrieved October 2, 2026, from https://4ort.xyz/entity/radical
MLA “radical.” 4ort.xyz Knowledge Graph, 4ort.xyz, 2 Oct. 2026, https://4ort.xyz/entity/radical.
BibTeX @misc{4ortxyz_radical_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{radical}}, year = {2026}, url = {https://4ort.xyz/entity/radical}, note = {Accessed: 2026-10-02}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): radical — https://4ort.xyz/entity/radical (retrieved 2026-10-02)

Canonical URL: https://4ort.xyz/entity/radical · 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. 5w ago · Piotr Osada · 2026-08-26 view diff on Wikidata ↗
    National library of poland mms id → 9810529956605606
    "/* wbsetclaim-create:2||1 */ [[Property:P7293]]: 9810529956605606"
  2. 12w ago · Nyuhn · 2026-07-10 view diff on Wikidata ↗
    P14541 → 277PXU
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/40849|batch #40849]]: ZGBK ID"
  3. 16w ago · Jindřich Rubeš · 2026-06-12 view diff on Wikidata ↗
    Svkkl authority id → h0004392-volne-radikaly
    "/* wbcreateclaim-create:1| */ [[Property:P9322]]: h0004392-volne-radikaly, [[:toollabs:quickstatements/#/batch/259493|batch #259493]]"
  4. 18w ago · Twofivesixbot bot · 2026-05-24 view diff on Wikidata ↗
    Interlingual index id → i115235
    Arabic ontology lexical concept id → 151079764
    "/* wbsetclaim-update-qualifiers:1||1|2 */ [[Property:P8189]]: 987007555978405171, mv to monolingual text names on J9U statements"
  5. 19w ago · Mahir256 · 2026-05-19 view diff on Wikidata ↗
    Wordnet 3.1 synset id → 06854209-n, 14898347-n
    "/* wbremoveclaims-remove:1| */ [[Property:P8814]]: 06854209-n"
  6. 19w ago · Twofivesixbot bot · 2026-05-18 view diff on Wikidata ↗
    Instance of → —
    Different from → substituent group, moiety, functional group
    Yso id → 2983
    Aliases → —
    + 12 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-statements-single-property-update:1||2 */ [[Property:P2347]], mv to monolingual text names on YSO statements"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.