# promethium

> chemical element with symbol Pm and atomic number 61

**Wikidata**: [Q1809](https://www.wikidata.org/wiki/Q1809)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Promethium)  
**Source**: https://4ort.xyz/entity/promethium


## References

1. Nature's Building Blocks An A-Z Guide of the Elements New Edition
2. promethium. Global Substance Registration System
3. [CAS Common Chemistry](https://commonchemistry.cas.org/detail?cas_rn=7440-12-2)
4. PROMETHIUM. PubChem
5. ChEBI release 2020-09-01
6. Atomic weights of the elements 2009 (IUPAC Technical Report)
7. [Source](https://lingualibre.org/wiki//Q379878)
8. [Source](https://www.cns11643.gov.tw/wordView.jsp?ID=214314)
9. Freebase Data Dumps. 2013
10. Promethium. ChemSpider
11. promethium atom. ChEBI
12. periodic table
13. Promethium. ECHA Substance Infocard database
14. UMLS 2023
15. Mapping file of InChIStrings, InChIKeys and DTXSIDs for the EPA CompTox Dashboard
16. National Library of Israel
17. KBpedia
18. UniChem