##  [Radical](/radical) 

  ##  [Radical](https://natural.quantumdictionary.io/radical-0) 

  

 [![Natural & Formal Sciences Dictionary](/sites/default/files/styles/large/public/2026-01/Natural%20%26%20Formal%20Sciences.png.webp?itok=2kCDRVQv)](/topic-specific-dictionaries/natural-formal-sciences)



**Natural & Formal Sciences Dictionary**

 







 

 

 

 



 

 

 

 

Definition

A chemical species that contains one or more unpaired electrons in its electronic structure, often neutral but sometimes charged, and therefore typically exhibits high reactivity relative to closed-shell species.