Halogen lamps glow at a higher temperature (2800 to 3400 kelvin) with a whiter colour than other incandescent bulbs. However, this requires bulbs to be manufactured from fused quartz rather than …

The meaning of HALOGEN is any of the five elements fluorine, chlorine, bromine, iodine, and astatine that form part of group VIIA of the periodic table and exist in the free state normally as diatomic …

Jan 2, 2026 · Halogen, any of the six nonmetallic elements that constitute Group 17 (Group VIIa) of the periodic table. The halogen elements are fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine …

HALOGEN definition: any of the electronegative elements, fluorine, chlorine, iodine, bromine, and astatine, that form binary salts by direct union with metals. See examples of halogen used in a …

Definition: What are halogens? Halogens are special category of highly reactive, non-metal elements which fall in group VIIa of the periodic table. Because of their high reactivity, the halogen family do …

Add to word list chemistry any of a group of five chemical elements that combine with hydrogen to make substances from which salts (= substances made with an acid) can be made (Definition of halogen …

Jan 14, 2026 · Noun halogen (plural halogens) (chemistry) Any element of group 17, i.e. fluorine, chlorine, bromine, iodine, astatine and tennessine.

Definition of halogen noun from the Oxford Advanced Learner's Dictionary. any of a set of five chemical elements, including fluorine, chlorine and iodine, that react with hydrogen to form acids from which …

1. Of or relating to the group of elements that are halogens. 2. Of or relating to a bright incandescent light bulb containing a halogen gas that prevents the filament from disintegrating at higher …

any of the chemical elements fluorine, chlorine, bromine, iodine, and astatine. They are all monovalent and readily form negative ions Collins English Dictionary. Copyright © HarperCollins Publishers