Common Polyatomic Ions

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Vocabulary flashcards covering common polyatomic ions and their corresponding chemical formulas.

Last updated 1:30 PM on 10/14/26

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Ammonium

A polyatomic ion with the chemical formula $NH_4^+$ .

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Hydroxide

A polyatomic ion with the chemical formula $OH^-$ .

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Nitrate

A polyatomic ion with the chemical formula $NO_3^-$ .

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Carbonate

A polyatomic ion with the chemical formula $CO_3^{2-}$ .

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Sulfate

A polyatomic ion with the chemical formula $SO_4^{2-}$ .

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Phosphate

A polyatomic ion with the chemical formula $PO_4^{3-}$ .

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Hydrogen carbonate

A polyatomic ion with the chemical formula $HCO_3^-$ , also referred to as bicarbonate.