Search by name
Use names like nitrate, sulfate, ammonium, hydroxide, carbonate, phosphate, acetate, or permanganate.
Ion lookup
Polyatomic Ion Finder
Search a common polyatomic ion and check its formula, charge, and example compounds before writing an ionic formula.
Polyatomic ions move through a formula as a group. Use parentheses when more than one copy is needed, such as Ca(NO3)2.
Matches
1 ion found
| Ion | Formula | Charge | Examples |
|---|---|---|---|
| nitrate | NO3 | -1 | NaNO3, Ca(NO3)2 |
Search by formula
You can also search formulas such as NO3, SO4, NH4, OH, CO3, PO4, and MnO4.
Use parentheses
When a formula needs more than one polyatomic ion, keep the ion together with parentheses.