অনিয়মীয়াকৈঅনিৰুদ্ধ
অনিয়াম আয়ন (Assamese)
1. In chemistry, an onium ion is a cation formally obtained by the protonation of mononuclear parent hydride of a pnictogen (group 15 of the periodic table), chalcogen (group 16), or halogen (group 17). The... from wikipedia.org