A reaction cycle named for this group of elements improves the lifespan of incandescent light bulbs by preventing the tungsten filament from evaporating.
A reaction cycle named for this group of elements improves the lifespan of incandescent light bulbs by preventing the tungsten filament from evaporating. This group includes an element necessary for normal thyroid function whose solid crystals can sublimate into a purple gas. Four of the seven elements which form (*) diatomic molecules belong to this group that also includes the anions found in table salt and the strongest mineral acids. Having members with seven valence electrons, name this group containing astatine, iodine, bromine, chlorine, and fluorine.
A reaction cycle named for this group of elements improves the lifespan of incandescent light bulbs by preventing the tungsten filament from evaporating.
{halogens} or {Group 17} or {Group 7A}