Polyatomic Ions and Chemical Formulas

Evaluation and Course Classifications

• Standard
• Honors

Monovalent Cations and Anions

• Ammonium ($*$): $NH_4^+$
• Cro 4 Acetete: $CH_3COO$
• Cyanide: $CN$
• Hydroxide: $OH^-$
• Nitrate: $NO_3$
• Nitrite: $NO_2$
• Permanganate: $Mn0_4$

Halogen and Related Polyatomic Ions

• Hypochlorite: $CIO^-$
• Chlorite: $CIO_2$
• Chlorate: $CIO_3$
• Perchlorate: $C104$
• Iodate: $103$

Divalent and Trivalent Oxyanion Groups

• Carbonate: $CO_2^{-2}$
• Chromate
• Dichromate: $C_{12}O_1$
• Peroxide
• Silicate: $5:03^{-2}$
• Sulfate: $SO_4^{-2}$
• Sulfite: $303^{-2}$
• Phosphate: $PO\text{ù}^{-3}$