Polyatomic ions or compounds

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Positive and negative polyatomic ions

Positive polyatomic ions: 

Ammonium: NH4(+)

Negative polyatomic ions: 

Nitrate: NO3(-)

Nitrite: NO2(-)

Sulfate: SO4(2-)

Sulfite: SO3(2-)

Carbonate: CO3(2-)

Phosphate: PO4(3-)

Hydroxide: OH(-)

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