Definition, Meaning & Synonyms
halogen
Noun
/ˈhæləˌdʒɛn/
Definition
A group of elements in Group 17 of the periodic table that are known for their reactive properties.
Examples
- Fluorine is the most reactive halogen.
- Chlorine gas is commonly used for disinfecting water.
- When sodium reacts with chlorine, sodium chloride, or table salt, is formed.
Meaning
Halogens are nonmetals that include fluorine, chlorine, bromine, iodine, and astatine. They are characterized by their strong reactivity, especially with alkali and alkaline earth metals to form salts.
Synonyms
- Reactive nonmetal
- Salt former
- Nonmetal group
