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ionization energy

minimum amount of energy required to remove an electron from an atom or molecule in the gaseous state
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Summary

ionization energy ranks in the top 2% of general entities by monthly Wikipedia readership (3,047 views/month).[1]

Key Facts

  • Subclass of: binding energy[2], chemical quantity[3]
  • Described by source: ISO 80000-12:2019 Quantities and units — Part 12: Condensed matter physics[4]
  • Main Wikidata property: P2260[5]
  • Different from: excitation energy[6], molar ionization energy[7]
  • Exact match: http://purl.obolibrary.org/obo/ENVO_2000024[8]
  • On focus list of Wikimedia project: Wikipedia:Vital articles/Level/4[9]
  • Recommended unit of measurement: joule[10], electronvolt[11], kilogram square metre per square second[12]

Why It Matters

ionization energy has Wikipedia articles in 29 language editions, a strong signal of global cultural recognition.[13] It is known by 71 alternative names across languages and contexts.[14]

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.
  7. [8] ↑ . wikidata.org.
  8. [9] ↑ . wikidata.org.
  9. [10] ↑ . wikidata.org.
  10. [11] ↑ . wikidata.org.
  11. [12] ↑ . wikidata.org.

Aggregate / graph-position facts

  1. [1] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [13] ↑ . Wikidata sitelinks. wikidata.org.
  3. [14] ↑ . 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). ionization energy. Retrieved October 16, 2026, from https://4ort.xyz/entity/ionization-energy
MLA “ionization energy.” 4ort.xyz Knowledge Graph, 4ort.xyz, 16 Oct. 2026, https://4ort.xyz/entity/ionization-energy.
BibTeX @misc{4ortxyz_ionization-energy_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{ionization energy}}, year = {2026}, url = {https://4ort.xyz/entity/ionization-energy}, note = {Accessed: 2026-10-16}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): ionization energy — https://4ort.xyz/entity/ionization-energy (retrieved 2026-10-16)

Canonical URL: https://4ort.xyz/entity/ionization-energy · 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 · عُثمان · 2026-09-10 view diff on Wikidata ↗
    Great russian encyclopedia online id (2017) → 4935851
    Recommended unit of measurement → joule, electronvolt, kilogram square metre per square second
    Wurvoc.org measure id → Ionization_energy
    Subclass of → —
    + 6 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-create:1||1 */ Wurvoc.org measure id: Ionization_energy, Matched to [[:toollabs:mix-n-match/#/entry/14008242|ionization energy (#14008242)]] in [[:toollabs:mix-n-match/#/catalog/281|Wurv"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.