# unbiennium

> hypothetical chemical element with the atomic number 129

**Wikidata**: [Q428640](https://www.wikidata.org/wiki/Q428640)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Unbiennium)  
**Source**: https://4ort.xyz/entity/unbiennium


## References

1. Freebase Data Dumps. 2013