Interested in learning how chemistry works?
This page tells you how intuitively!
The aim is to build understanding in a logical fashion.
For example, it helps a lot if you know what an element is to know before you find out what an atom is and then what is inside an atom.
1.2 What are atoms?
1.7 Ionic bonding
1.8 Covalent bonding
1.9 Complex ions
2.1 The Mole Concept
2.2 Molar Volume