English Noun en-noun #chemistry any cation derived by the addition of a proton to the hydride of any element of the nitrogen, chalcogen or halogen families #chemistry any organic derivative of these compounds See also ammonium arsonium bismuthonium bromonium chloronium fluoronium iodonium oxonium phosphonium selenonium stibonium sulfonium / sulphonium telluronium
ru:onium
