Common Ions need to know

• hydrogen


  H⁺
• lithium


  Li⁺
• sodium

  Na⁺
• potassium

  K⁺
• magnesium

  Mg²⁺
• calcium


  Ca²⁺
• barium


  Ba²⁺
• aluminium

  Al³⁺
• fluoride

  F⁻
• chloride

  Cl⁻
• bromide

  Br⁻
• iodide

  I⁻
• oxide

  O²⁻
• sulfide


  S²⁻
• silver


  Ag⁺
• zinc


  Zn²⁺
• copper (I)


  Cu⁺
• copper (II)


  Cu²⁺
• chromium (II)


  Cr²⁺
• chromium (III)


  Cr³⁺
• manganese (II)


  Mn²⁺
• iron (II)


  Fe²⁺
• iron (III)


  Fe³⁺
• cobalt (II)


  Co²⁺
• tin (II)


  Sn²⁺
• tin (IV)


  Sn⁴⁺
• lead (II)


  Pb²⁺
• carbonate


  CO₃²⁻
• nitrate


  NO₃⁻
• nitrite


  NO₂⁻
• phosphate


  PO₄³⁻
• sulfate


  SO₄²⁻
• sulfite


  SO₃²⁻
• chlorate (VII)


  ClO₄⁻
• chlorate (V)


  ClO₃⁻
• chlorate (I)


  ClO⁻
• ethanoate


  CH₃COO⁻
• hydroxide


  OH⁻
• permanganate


  MnO₄⁻
• ammonium


  NH₄⁺