Question

Question #62e5a

Answer 1

`\text{SO}_3` has an incomplete octet; it has 12 electrons assigned to the central S atom instead of the typical 8.

Explanation:

The structure of `\text{CO}_2` is

The central atom (carbon) has 8 electrons assigned to it, making it a full octet.

The structure of ICL is

Both iodine and chlorine have 8 electrons assigned to it, making both of them have a full octet.

The structure of `\text{SO}_3` is

The central atom (sulfur) has a total of 12 electrons assigned to it, so the central atom of `\text{SO}_3` has an incomplete octet.

The structure of `\text{O}_3` is

Although `\text{O}_3` has resonance structures, the central atom in all of these resonance structures have 8 electrons assigned to it, making them have a full octet.