Common Polyatomic Ions

Cations (Positively Charged Polyatomic Ions)

  • Ammonium:

    • Name: ammonium
    • Standard Chemical Formula and Charge: NH4+\text{NH}_4^+
    • Transcript Notation: NH4∗\text{NH}_4^*

  • Hydronium:

    • Name: hydronium
    • Standard Chemical Formula and Charge: H3O+\text{H}_3\text{O}^+
    • Transcript Notation: H3O+\text{H}_3\text{O}^+

  • Mercury (I):

    • Name: mercury (1)
    • Standard Chemical Formula and Charge: Hg22+\text{Hg}_2^{2+}
    • Transcript Notation: Hg22+\text{Hg}_2^{2+}

Chlorine-Based Polyatomic Anions

  • Perchlorate:

    • Name: perchlorate
    • Standard Chemical Formula and Charge: ClO4−\text{ClO}_4^-
    • Transcript Notation: CLO4\text{CLO}_4

  • Chlorate:

    • Name: chlorate
    • Standard Chemical Formula and Charge: ClO3−\text{ClO}_3^-
    • Transcript Notation: CLO3\text{CLO}_3

  • Chlorite:

    • Name: chlorite V
    • Standard Chemical Formula and Charge: ClO2−\text{ClO}_2^-
    • Transcript Notation: CLO2\text{CLO}_2

  • Hypochlorite:

    • Name: hypochlorite
    • Standard Chemical Formula and Charge: ClO−\text{ClO}^-
    • Transcript Notation: CLO\text{CLO}

Nitrogen-Based Polyatomic Anions

  • Nitrate:

    • Name: nitrate
    • Standard Chemical Formula and Charge: NO3−\text{NO}_3^-
    • Transcript Notation: NO3\text{NO}_3

  • Nitrite:

    • Name: nitrite
    • Standard Chemical Formula and Charge: NO2−\text{NO}_2^-
    • Transcript Notation: NO2\text{NO}_2

  • Azide:

    • Name: azide
    • Standard Chemical Formula and Charge: N3−\text{N}_3^-
    • Transcript Notation: N3\text{N}_3

Sulfur-Based Polyatomic Anions

  • Sulfate:

    • Name: sulfate
    • Standard Chemical Formula and Charge: SO42−\text{SO}_4^{2-}
    • Transcript Notation: SO42−\text{SO}_4^{2-}

  • Sulfite:

    • Name: sulfite
    • Standard Chemical Formula and Charge: SO32−\text{SO}_3^{2-}
    • Transcript Notation: SO32−\text{SO}_3^{2-}

  • Bisulfate (Hydrogen Sulfate):

    • Name: bisulfate
    • Standard Chemical Formula and Charge: HSO4−\text{HSO}_4^-
    • Transcript Notation: HSO4∗\text{HSO}_4^*

  • Thiocyanate:

    • Name: thiocyanateV
    • Standard Chemical Formula and Charge: SCN−\text{SCN}^-
    • Transcript Notation: SCN\text{SCN}

Phosphorus-Based Polyatomic Anions

  • Phosphate:

    • Name: phosphate
    • Standard Chemical Formula and Charge: PO43−\text{PO}_4^{3-}
    • Transcript Notation: PO43−\text{PO}_4^{3-}

  • Phosphite:

    • Name: phosphite√
    • Standard Chemical Formula and Charge: PO33−\text{PO}_3^{3-}
    • Transcript Notation: PO33−\text{PO}_3^{3-}

  • Hydrogen Phosphate:

    • Name: hydrogen phosphate
    • Standard Chemical Formula and Charge: HPO42−\text{HPO}_4^{2-}
    • Transcript Notation: HPO42−\text{HPO}_4^{2-}

  • Dihydrogen Phosphate:

    • Name: dihydrogen phosphate
    • Standard Chemical Formula and Charge: H2PO4−\text{H}_2\text{PO}_4^-
    • Transcript Notation: H2PO4\text{H}_2\text{PO}_4

Carbon-Based Polyatomic Anions

  • Carbonate:

    • Name: carbonate
    • Standard Chemical Formula and Charge: CO32−\text{CO}_3^{2-}
    • Transcript Notation: CO2−\text{CO}_2^-

  • Bicarbonate (Hydrogen Carbonate):

    • Name: bicarbonate
    • Standard Chemical Formula and Charge: HCO3−\text{HCO}_3^-
    • Transcript Notation: HCO3\text{HCO}_3

  • Acetate:

    • Name: acetate
    • Standard Chemical Formula and Charge: C2H3O2−\text{C}_2\text{H}_3\text{O}_2^-
    • Transcript Notation: C2H3O2\text{C}_2\text{H}_3\text{O}_2

  • Oxalate:

    • Name: oxalate V
    • Standard Chemical Formula and Charge: C2O42−\text{C}_2\text{O}_4^{2-}
    • Transcript Notation: C2O4\text{C}_2\text{O}_4

  • Cyanide:

    • Name: cyanide
    • Standard Chemical Formula and Charge: CN−\text{CN}^-
    • Transcript Notation: CN\text{CN}

Transition Metal Polyatomic Anions

  • Chromate:

    • Name: chromate
    • Standard Chemical Formula and Charge: CrO42−\text{CrO}_4^{2-}
    • Transcript Notation: CrO42−\text{CrO}_4^{2-}

  • Dichromate:

    • Name: dichromate
    • Standard Chemical Formula and Charge: Cr2O72−\text{Cr}_2\text{O}_7^{2-}
    • Transcript Notation: Cr2O72−\text{Cr}_2\text{O}_7^{2-}

  • Permanganate:

    • Name: permanganate
    • Standard Chemical Formula and Charge: MnO4−\text{MnO}_4^-
    • Transcript Notation: MnO4\text{MnO}_4

Oxygen and Hydroxide Species

  • Hydroxide:

    • Name: hydroxide
    • Standard Chemical Formula and Charge: OH−\text{OH}^-
    • Transcript Notation: OH\text{OH}

  • Peroxide:

    • Name: peroxide
    • Standard Chemical Formula and Charge: O22−\text{O}_2^{2-}
    • Transcript Notation: 022-\text{022-}