Lewis Dot Diagrams - Part One

This is a recap of Year 12 Chemistry.

We use Lewis Dot Diagrams to represent the bonding pairs and lone pairs of electrons in a molecule and an ion. We only focus on the valence electrons, as these are the ones that influence the shape of the ion/molecule, so affect their properties the most.

Simple Lewis Dot Diagrams
In a lot of molecules, the atoms automatically obey the Octet Rule once we include the lone pairs of electrons.

More Complex Lewis Dot Diagrams
These molecules (and ions) do not obey the Octet Rule once we assign the remaining electrons as lone pairs. Therefore, we need to shift pairs of electrons around to create double (or triple) bonds.