Common Ions in Chemistry

Common Ions

• Hydrogen ion: H+
• Lithium ion: Li+
• Sodium ion: Na+
• Potassium ion: K+
• Silver ion: Ag+
• Magnesium ion: Mg2+
• Calcium ion: Ca2+
• Strontium ion: Sr2+
• Barium ion: Ba2+
• Zinc ion: Zn2+
• Aluminum ion: Al3+
• Hydride: H-
• Fluoride: F-
• Chloride: Cl-
• Bromide: Br-
• Iodide: I-
• Oxide: O2-
• Sulfide: S2-
• Nitride: N3-
• Phosphide: P3-
• Ammonium: NH4+
• Hydronium: H3O+
• Hydroxide: OH-
• Cyanide: CN-
• Peroxide: H2O2
• Carbonate: CO32-
• Nitrite: NO2-
• Nitrate: NO3-
• Phosphite: PO33-
• Phosphate: PO43-
• Sulfite: SO32-
• Sulfate: SO42-
• Hypochlorite: ClO-
• Chlorite: ClO2-
• Chlorate: ClO3-
• Perchlorate: ClO4-
• Acetate: CH3COO- or C2H3O2-
• Silicate: SiO32-
• Permanganate: MnO4-
• Chromate: CrO42-
• Hydrogen carbonate (or bicarbonate): HCO3-
• Copper: Cu+ (copper (I)) or Cu2+ (copper (II))
• Iron: Fe2+ (iron (II)) or Fe3+ (iron (III))
• Lead: Pb2+

Ion Concepts and Classifications

• Common ion: An ion that is part of more than one ionic compound.
• Monatomic ion: An ion composed of a single atom.
• Anion: A negatively charged ion.
• Cation: A positively charged ion.
• Polyatomic ion: An ion composed of more than one atom.
• Polyatomic cation: positively charged polyatomic ion
• Monoatomic anion: a negatively charged ion made from a single atom
• Monoatomic cation: a positively charged ion made from a single atom
• Polyatomic anion: a negatively charged ion made from more than one atom