# actinide

> f-block chemical elements

**Wikidata**: [Q19577](https://www.wikidata.org/wiki/Q19577)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Actinide)  
**Source**: https://4ort.xyz/entity/actinide


## References

1. [Source](https://www.rsc.org/periodic-table/element/89/actinium)
2. Library of Congress
3. RAMEAU
4. Nuovo soggettario
5. Freebase Data Dumps. 2013
6. Biblioteca Nacional de España
7. [Registros de autoridad de "Materia" de la Biblioteca Nacional de España. Spain open data portal](https://www.bne.es/media/datosgob/catalogo-autoridades/materia/materia-UTF8.zip)
8. BabelNet
9. UMLS 2023
10. Quora
11. National Library of Israel
12. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)