A<unk>  is a binary compound, of which one part is a halogen atom  and the other part is an element or radical that is less electronegative than the halogen, to make a fluoride, chloride, bromide, iodide, or astatide compound.  Many salts are<unk> s. All Group 1 metals form<unk> s with the halogens and they are white solids.
A<unk>  ion is a halogen atom bearing a negative charge.  The<unk>  anions are fluoride (F−), chloride (Cl−), bromide (Br−), iodide (I−) and astatide (At−).  Such ions are present in all ionic<unk>  salts.
Halide
Haloalkane
Ether
Cycloalkane
Bromide
Carbide
Methanol
Phorate