# roentgenium

> chemical element with symbol Rg and atomic number 111

**Wikidata**: [Q1272](https://www.wikidata.org/wiki/Q1272)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Roentgenium)  
**Source**: https://4ort.xyz/entity/roentgenium


## References

1. Library of Congress
2. Atomic weights of the elements 2009 (IUPAC Technical Report)
3. [Source](https://www.cns11643.gov.tw/wordView.jsp?ID=154447)
4. Freebase Data Dumps. 2013
5. National Library of Israel
6. KBpedia
7. GF WordNet