halogens
hal-o-gens
noun
A group of five reactive non-metallic elements: fluorine, chlorine, bromine, iodine, and astatine.
"Chlorine and iodine are common halogens."
hal-o-gens
A group of five reactive non-metallic elements: fluorine, chlorine, bromine, iodine, and astatine.
"Chlorine and iodine are common halogens."