radium-221

isotope of radium
Thing isotope_of_radium Q18888801
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radium-221

Summary

radium-221 is an isotope of radium[1].

Key Facts

  • radium-221's instance of is recorded as isotope of radium[2].
  • radium-221's subclass of is recorded as radium[3].
  • radium-221's decays to is recorded as radon-217[4].
  • radium-221's decays to is recorded as lead-207[5].
  • radium-221's decays to is recorded as carbon-14[6].
  • radium-221's atomic number is recorded as {'unit': '1', 'amount': '+88'}[7].
  • radium-221's spin quantum number is recorded as {'unit': '1', 'amount': '+2.5'}[8].
  • radium-221's parity quantum number is recorded as {'unit': '1', 'amount': '+1'}[9].
  • radium-221's neutron number is recorded as {'unit': '1', 'amount': '+133'}[10].
  • radium-221's mass is recorded as {'unit': 'http://www.wikidata.org/entity/Q483261', 'amount': '+221.013917224'}[11].
  • radium-221's half-life is recorded as {'unit': 'http://www.wikidata.org/entity/Q11574', 'amount': '+28.0'}[12].
  • radium-221's binding energy is recorded as {'unit': 'http://www.wikidata.org/entity/Q28719934', 'amount': '+1701950.835'}[13].
  • radium-221's mass excess is recorded as {'unit': 'http://www.wikidata.org/entity/Q28719934', 'amount': '+12963.811'}[14].
  • radium-221's Wolfram Language entity code is recorded as Entity["Isotope", "Radium221"][15].

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] . NuDat. Retrieved . nndc.bnl.gov. Provenance: wikidata.org.
  4. [5] . wikidata.org.
  5. [6] . wikidata.org.
  6. [7] . wikidata.org.
  7. [8] . NuDat. Retrieved . nndc.bnl.gov. Provenance: wikidata.org.
  8. [9] . NuDat. Retrieved . nndc.bnl.gov. Provenance: wikidata.org.
  9. [10] . wikidata.org.
  10. [11] . The AME2016 atomic mass evaluation (I). Evaluation of input data; and adjustment procedures. Retrieved . amdc.in2p3.fr. Provenance: wikidata.org.
  11. [12] . NuDat. Retrieved . nndc.bnl.gov. Provenance: wikidata.org.
  12. [13] . The AME2016 atomic mass evaluation (I). Evaluation of input data; and adjustment procedures. Retrieved . amdc.in2p3.fr. Provenance: wikidata.org.
  13. [14] . The AME2016 atomic mass evaluation (I). Evaluation of input data; and adjustment procedures. Retrieved . amdc.in2p3.fr. Provenance: wikidata.org.
  14. [15] . 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). radium-221. Retrieved May 3, 2026, from https://4ort.xyz/entity/radium-221
MLA “radium-221.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/radium-221.
BibTeX @misc{4ortxyz_radium-221_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{radium-221}}, year = {2026}, url = {https://4ort.xyz/entity/radium-221}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): radium-221 — https://4ort.xyz/entity/radium-221 (retrieved 2026-05-03)

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