any of five related nonmetallic elements (fluorine or chlorine or bromine or iodine or astatine) that are all monovalent and readily form negative ions
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halogen::noun | Spocien Dictionary
| Type | Words |
|---|---|
| Type of | grouping, group |
| Has types | atomic number 17, atomic number 35, atomic number 53, atomic number 85, atomic number 9, br, bromine, chlorine, cl, f, fluorine, i, iodin, astatine, iodine, at |
