2021-2022 Polyatomic Ions To Memorize

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If homework has polyatomic ions that are included in the above ones you need to memorize, then look in this link (AnionTable).

If homework has polyatomic ions that are NOT included in the above ones you need to memorize, then look in this link (AnionTable).

2021-2022 Polyatomic Ions to Memorize
This list does not include anions you can get directly from the Periodic Table

Phosphate, PO₄^3-
Phosphite, PO₃^3-
Acetate, C₂H₃O₂^1-
Sulfite, SO₃^2-
Sulfate, SO₄^2-
Carbonate, CO ₃^2-
Nitrite, NO₂^1-
Nitrate, NO₃^1-
Hydroxide, OH^1-
Chlorite, ClO₂^1-
Chlorate, ClO₃^1-
Chromate, CrO₄^2-
Cyanide, CN^1-

PLUS ONE CATION POLYATOMIC IONS: Ammonium NH₄¹⁺

If homework has polyatomic ions that are NOT included in the above ones you need to memorize, then look in this link (AnionTable).