thallium-209

isotope of thallium
Thing isotope_of_thallium Q18883344
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thallium-209

Summary

thallium-209 is an isotope of thallium[1]. thallium-209 is known by 10 alternative names across languages and contexts.[2]

Key Facts

  • thallium-209's instance of is recorded as isotope of thallium[3].
  • thallium-209 is a type of thallium[4].
  • thallium-209's decays to is recorded as lead-209[5].
  • thallium-209's atomic number is recorded as {'amount': '+81'}[6].
  • thallium-209's spin quantum number is recorded as {'amount': '+0.5'}[7].
  • thallium-209's parity quantum number is recorded as {'amount': '+1'}[8].
  • thallium-209's neutron number is recorded as {'amount': '+128'}[9].
  • thallium-209's mass is recorded as {'amount': '+208.98535175'}[10].
  • thallium-209's half-life is recorded as {'amount': '+2.161'}[11].
  • thallium-209's binding energy is recorded as {'amount': '+1637179.973'}[12].
  • thallium-209's mass excess is recorded as {'amount': '-13644.757'}[13].

Body

Definition and Type

thallium-209's instance of is recorded as isotope of thallium[3]. thallium-209 is a type of thallium[4].

Why It Matters

thallium-209 is known by 10 alternative names across languages and contexts.[2]

📑 Cite this page

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APA 4ort.xyz Knowledge Graph. (2026). thallium-209. Retrieved October 2, 2026, from https://4ort.xyz/entity/thallium-209
MLA “thallium-209.” 4ort.xyz Knowledge Graph, 4ort.xyz, 2 Oct. 2026, https://4ort.xyz/entity/thallium-209.
BibTeX @misc{4ortxyz_thallium-209_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{thallium-209}}, year = {2026}, url = {https://4ort.xyz/entity/thallium-209}, note = {Accessed: 2026-10-02}}
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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. 15d ago · Profesorul Blazat · 2026-09-19 view diff on Wikidata ↗
    Wolfram language entity code → Entity["Isotope", "Thallium209"]
    Binding energy → {'amount': '+1637179.973'}
    Decays to → lead-209
    Instance of → isotope of thallium
    + 10 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-update-languages-short:0||ro */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/55080|batch #55080]]"
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