A simple procedure for writing co-valent

Several worked examples relevant to this procedure were given in previous posts please see the Sitemap - Table of Contents (Lewis Electron Dot Structures).

**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 examine the case of SO

_{2}__Step 1__: Connect the atoms with single bonds.
Fig. 1: The SO_{2}^{ }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 SO

_{2}.
Therefore, P = 6n
+ 2 – V = 6 * 3 + 2 – 18 = 2

**So, there is one double bond in the molecule.**__Step 3 & 4__: The

**of**

__resonance structures___{ }SO

_{2}

^{ }are

**as follows:**

Fig. 2: Lewis
structures of SO_{2} |

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