Web1 day ago · polyatomic ions are charged molecules made of two or more ions. The entire molecule has an overall charge. It is important not only to be able to identify and name the ion but also to remember the ion's charge. Webthe formulas, names, and charges for common polyatomic ions. Includes metal cations (specifically, their old names). Webstudy common polyatomic ions using smart web & mobile flashcards created by top students, teachers, and professors. Prep for a quiz or learn for fun! Webpolyatomic ions quiz for 9th grade students. Find other quizzes for chemistry and more on quizizz for free! Webstudy with quizlet and memorize flashcards containing terms like ammonium, nitrite, nitrate and more.