# period 4

> fourth row in the periodic table of chemical elements

**Wikidata**: [Q239825](https://www.wikidata.org/wiki/Q239825)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Period_4_element)  
**Source**: https://4ort.xyz/entity/period-4


## References

1. Freebase Data Dumps. 2013
2. BabelNet