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Abbreviation of Sulphur Dioxide (SO₂)

• The chemical abbreviation or empirical formula for the compound Sulphur Dioxide is SO₂.
  
  
• The chemical abbreviation for the element Sulphur is the capital letter S. .
  
• The chemical abbreviation for the element oxygen is the capital letter O. .
  
  
• The number of atoms of each element per molecule is shown by the number to the lower-right (subscript) of the abbreviated element.
  
  
• Hence sulphur dioxide is abbreviated to SO₂, indicating that one molecule of the compound SO₂ is made of one atom of sulphur (S) and two (2) atoms of oxygen (O).