2.1-2.2

Resonance structures are different ways to represent the same molecule by moving electrons around. They help illustrate how electrons are distributed across the molecule and that the actual structure is a blend of these representations. Think of it like different snapshots of a single scene - each one shows something slightly different, but together they give a clearer picture of what's happening.

A functional group is a group of atoms within a molecule that has a characteristic chemical behavior

• A functional group is a group of atoms within a molecule that has a characteristic chemical behavior