# francium

> chemical element with symbol Fr and atomic number 87

**Wikidata**: [Q671](https://www.wikidata.org/wiki/Q671)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Francium)  
**Source**: https://4ort.xyz/entity/francium


## References

1. francium atom. ChEBI
2. [CAS Common Chemistry](https://commonchemistry.cas.org/detail?cas_rn=7440-73-5)
3. FRANCIUM. PubChem
4. ChEBI release 2020-09-01
5. Atomic weights of the elements 2009 (IUPAC Technical Report)
6. [Source](https://lingualibre.org/wiki//Q379880)
7. [Source](https://www.cns11643.gov.tw/wordView.jsp?ID=217905)
8. Freebase Data Dumps. 2013
9. FRANCIUM. Global Substance Registration System
10. Francium. ChemSpider
11. BabelNet
12. UMLS 2023
13. Mapping file of InChIStrings, InChIKeys and DTXSIDs for the EPA CompTox Dashboard
14. Quora
15. National Library of Israel
16. KBpedia
17. UniChem