# Grotrian diagram

> diagram showing energy levels of an atom

**Wikidata**: [Q899831](https://www.wikidata.org/wiki/Q899831)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Grotrian_diagram)  
**Source**: https://4ort.xyz/entity/grotrian-diagram


## References

1. Freebase Data Dumps. 2013