Polyatomic ions 2 A practice quiz to help you study and remember all of the polyatomic ions toripinkc published on January 08, 2012 Stacked 1/16 CO3-2 Type answer. Hint: 9 characters 2/16 NH4+ Type answer. Hint: 8 characters 3/16 SO4-2 Type answer. Hint: 7 characters 4/16 BrO3- Type answer. Hint: 7 characters 5/16 ClO4- Type answer. Hint: 11 characters 6/16 ClO3- Type answer. Hint: 8 characters 7/16 OH- Type answer. Hint: 9 characters 8/16 PO4-3 Type answer. Hint: 9 characters 9/16 NO3- Type answer. Hint: 7 characters 10/16 CH3COO- Type answer. Hint: 7 characters 11/16 HCO3- Type answer. Hint: 18 characters 12/16 MnO4- Type answer. Hint: 12 characters 13/16 C2O4-2 Type answer. Hint: 7 characters 14/16 CN- Type answer. Hint: 7 characters 15/16 IO3- Type answer. Hint: 6 characters 16/16 ClO- Type answer. Hint: 12 characters