polyatomic ions

Ammonium

Ammonium

(NH₄)⁺

Nitrate

(NO₃)⁻

Nitrite

(NO₂)⁻

Acetate

(C₂H₃O₂)⁻

Acetate (alternate)

CH₃COO-

Perchlorate

(ClO₄)-

Perbromate

(BrO₄)-

Periodate

(IO₄)-

Chlorate

(ClO₃)⁻

Bromate

(BrO₃)⁻

Iodate

(IO₃)⁻

Chlorite

(ClO₂)⁻

Bromite

(BrO₂)⁻

Iodite

(IO₂)⁻

Hypochlorite

(ClO)⁻

Hypobromite

(BrO)-

Hypoiodite

(IO)-

Sulfate

(SO₄)²⁻

Sulfite

(SO₃)²⁻

Phosphate

(PO₄)³⁻

Carbonate

(CO₃)²⁻

Hydroxide

(OH)-

Chromate

(CrO₄)²-

Dichromate

(Cr₂O₇)²⁻

Cyanide

(CN)⁻

Permanganate

(MnO₄)⁻

effect of adding hydrogen

the charge becomes more positive by 1