Home › Entities › exotic atom › protonium

protonium

bound state of a proton and antiprotron
Class type of: exotic atom Q936991

Facts

6 properties
Instance of
exotic atom, onium[2]
Subclass of
exotic atom[5]
Chemical formula
Pn[4]
Element symbol
Pn[3]
Has part(s)
proton, antiproton[6][7]
Has parts
proton, antiproton
🏷️ Also known as
en antiprotonic hydrogen en Pn en proton-antiproton atom en protonium de Pn es Protonio hi प्रोटोनियम ja プロトニウム ru Pn ru протоний uk Протоній vi Protoni zh 質子素
🔖 Identifiers · 3
BabelNet ID
00274737n
Freebase ID
/m/04b9d0
Microsoft Academic ID (discontinued)
2778127246

Report an error or request removal Lineage (PROV-JSON)

🔗 Connections
Has part(s) 2
proton, antiproton
Instance of 2
exotic atom, onium
Subclass of 1
exotic atom
Press Enter · cited answer in seconds

Summary

protonium is an exotic atom[1].

References

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

Direct Wikidata claims

  1. [2] ↑ . wikidata.org.
  2. [3] ↑ . wikidata.org.
  3. [4] ↑ . wikidata.org.
  4. [5] ↑ . wikidata.org.
  5. [6] ↑ . wikidata.org.
  6. [7] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. 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). protonium. Retrieved November 13, 2026, from https://4ort.xyz/entity/protonium
MLA “protonium.” 4ort.xyz Knowledge Graph, 4ort.xyz, 13 Nov. 2026, https://4ort.xyz/entity/protonium.
BibTeX @misc{4ortxyz_protonium_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{protonium}}, year = {2026}, url = {https://4ort.xyz/entity/protonium}, note = {Accessed: 2026-11-13}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): protonium — https://4ort.xyz/entity/protonium (retrieved 2026-11-13)

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