# sigma bond

> strongest type of covalent chemical bond; formed by head-on overlapping between atomic orbitals.

**Wikidata**: [Q306229](https://www.wikidata.org/wiki/Q306229)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Sigma_bond)  
**Source**: https://4ort.xyz/entity/sigma-bond


## References

1. Freebase Data Dumps. 2013
2. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)