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period 9

period 9 (row 9) of the periodic table (today, theoretical only)
Thing period Q986218

Facts

5 properties
Instance of
period
Follows
period 8[2]
Followed by
period 10[3]
Has part(s)
chemical element[4]
Has parts
chemical element
🏷️ Also known as
en period 9 de chemische Elemente der neunten Periode de Periode-9-Element el 9η περίοδος χημικών στοιχείων es elementos del periodo 9 fr neuvième période du tableau périodique hu 9. periódus hu 9. periódusbeli elem id elemen periode 9 id periode 9 id unsur periode 9 it elementi del periodo 9 ja 第9周期元素 ko 9주기 원소 ru 9 период ru 9 период таблицы химических элементов ru девятый период периодической системы ru элемент 9 периода th ธาตุคาบ 9 vi chu kì nguyên tố 9
🔖 Identifiers · 1
Freebase ID
/m/0n_h_mc

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

🔗 Connections
Has these parts 3
unsepttrium, unquadquadium, unquadpentium
Belongs to 1
extended periodic table
Followed by 1
period 10
Followed by (predecessor) 1
period 10
Follows 1
period 8
Has part(s) 1
chemical element
Instance of 1
period
Preceded by (successor) 1
period 8
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Summary

period 9 is a period[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.

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). period 9. Retrieved November 4, 2026, from https://4ort.xyz/entity/period-9
MLA “period 9.” 4ort.xyz Knowledge Graph, 4ort.xyz, 4 Nov. 2026, https://4ort.xyz/entity/period-9.
BibTeX @misc{4ortxyz_period-9_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{period 9}}, year = {2026}, url = {https://4ort.xyz/entity/period-9}, note = {Accessed: 2026-11-04}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): period 9 — https://4ort.xyz/entity/period-9 (retrieved 2026-11-04)

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