# antiprotonic helium

> exotic matter with an antiproton in place of an electron

**Wikidata**: [Q3723095](https://www.wikidata.org/wiki/Q3723095)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Antiprotonic_helium)  
**Source**: https://4ort.xyz/entity/antiprotonic-helium


## References

1. Freebase Data Dumps. 2013