Halogen — definition
1. halogen (Noun)
1 definition
halogen (Noun) — Any of five related nonmetallic elements (fluorine, chlorine, bromine, iodine or astatine) that are all monovalent and readily form negative ions.
2 types of
group grouping
16 types
Br Cl F astatine at atomic number 17 atomic number 35 atomic number 53 atomic number 85 atomic number 9 bromine chlorine fluorine i iodin iodine