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

Lewis structure of SO2 – Simple Procedure for Dot structuresUntitled Document

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.

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,




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