Covalent| Lewis structure| SO2 – Simple Procedure for Dot structures - #53

Lewis structure of SO2 – Simple Procedure for Dot structures

Lewis structure of SO2 – Simple Procedure for drawing Dot structures

simple method for writing Lewis Structures was given in a previous article entitled Lewis Structures and the Octet Rule”. Several worked examples relevant to this procedure were given in previous posts please see the Sitemap - Table of Contents (Lewis Electron Dot Structures).

Let us consider the case of SO2. What is the Lewis structure of SO2?

Step 1: Connect the atoms with single bonds.

Fig. 1:  The SO2  atoms connected with single bonds


Step 2: Calculate the # of electrons in π bonds (multiple bonds) using formula (1)  :

Where n in this case is 3. Where V = 6 + 6 + 6 = 18, V is the number of valence electrons of the molecule.

Therefore, P = 6n + 2 – V = 6 * 3 + 2 – 18  = 2   Therefore, there is one double bond in the molecule.


Step 3 & 4: The resonance structures of SO2 are as follows

Fig. I.2:  Lewis structures of SO2



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  1. G.N. Lewis, J.A.C.S, 38, 762-785, (1916)
  2.  E. C. McGoran, J. Chem. Educ., 68, 19-23 (1991)
  3. A.B.P. Lever, J. Chem. Educ., 49, 819-821, (1972)


Key Terms

resonance structures of sulfur dioxide SO2, Lewis electron structures of SO2, chemical formula of SO2, simple method for drawing Lewis structures of SO2, Lewis structure of sulfur dioxide SO2,




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