<unk>  is a polyatomic ion with the chemical formula . Salts containing this ion are called<unk> s.<unk> s are common components of fertilizers and explosives. Almost all inorganic<unk> s are soluble in water. An example of an insoluble<unk>  is bismuth oxynitrate.
Nitrate
Bromide
Haloalkane
Phosphine
Saline 
Alcohols 
Phosphate
Gluten