# holmium

> chemical element with symbol Ho and atomic number 67

**Wikidata**: [Q1846](https://www.wikidata.org/wiki/Q1846)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Holmium)  
**Source**: https://4ort.xyz/entity/holmium


## References

1. Nature's Building Blocks An A-Z Guide of the Elements New Edition
2. [Source](https://www.rsc.org/periodic-table/element/67/holmium)
3. holmium. Global Substance Registration System
4. [CAS Common Chemistry](https://commonchemistry.cas.org/detail?cas_rn=7440-60-0)
5. HOLMIUM. PubChem
6. ChEBI release 2020-09-01
7. Atomic weights of the elements 2009 (IUPAC Technical Report)
8. [Source](https://www.cns11643.gov.tw/wordView.jsp?ID=147755)
9. 1RER. Protein Data Bank
10. 2OLC. Protein Data Bank
11. 1MSB. Protein Data Bank
12. 1BUU. Protein Data Bank
13. 3EEU. Protein Data Bank
14. 2BPU. Protein Data Bank
15. 2Y9X. Protein Data Bank
16. 2Y9W. Protein Data Bank
17. 4BSP. Protein Data Bank
18. 4BDW. Protein Data Bank
19. 1PSR. Protein Data Bank
20. Freebase Data Dumps. 2013
21. Holmium. ChemSpider
22. holmium atom. ChEBI
23. periodic table
24. Standard atomic weights of the elements 2021 (IUPAC Technical Report). Pure and Applied Chemistry
25. Holmium. ECHA Substance Infocard database
26. BabelNet
27. UMLS 2023
28. Mapping file of InChIStrings, InChIKeys and DTXSIDs for the EPA CompTox Dashboard
29. Harmonized System
30. National Library of Israel
31. KBpedia
32. GF WordNet
33. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)
34. UniChem