# The expansion of chemical space in 1826 and in the 1840s prompted the convergence to the periodic system

> Research article (Proceedings of the National Academy of Sciences, 2022) · cited 13× · AI/ML

**Wikidata**: [openalex:W4286586726](https://www.wikidata.org/wiki/openalex:W4286586726)  
**Source**: https://4ort.xyz/entity/the-expansion-of-chemical-space-in-1826-and-in-the-1840s-prompted-the-convergence-to-the-periodic-system