# thulium

> chemical element with symbol Tm and atomic number 69

**Wikidata**: [Q1853](https://www.wikidata.org/wiki/Q1853)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Thulium)  
**Source**: https://4ort.xyz/entity/thulium


## References

1. thulium. Global Substance Registration System
2. [CAS Common Chemistry](https://commonchemistry.cas.org/detail?cas_rn=7440-30-4)
3. THULIUM. PubChem
4. ChEBI release 2020-09-01
5. Atomic weights of the elements 2009 (IUPAC Technical Report)
6. [Source](https://www.cns11643.gov.tw/wordView.jsp?ID=151165)
7. Freebase Data Dumps. 2013
8. Thulium. ChemSpider
9. thulium atom. ChEBI
10. periodic table
11. Standard atomic weights of the elements 2021 (IUPAC Technical Report). Pure and Applied Chemistry
12. Thulium. ECHA Substance Infocard database
13. BabelNet
14. UMLS 2023
15. Mapping file of InChIStrings, InChIKeys and DTXSIDs for the EPA CompTox Dashboard
16. National Library of Israel
17. KBpedia
18. GF WordNet
19. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)
20. UniChem