Hello y'all!

So, we have already studied chapters 1-3 and 12 and 13. There's altogether 11 sub-chapters. We thought that everyone could write notes about one subchapter and maybe include pictures/videos if you can find any useful ones. As there are 5 people involved, that'd mean 2 sub-chapters per a person. Comment below which chapters you want.
Please note! Use tags to make finding material easier, e.g. when writing about the electron configuration, use "atomic structure" and "chapter 2", as well as "electron configuration".

The chapters are the following
1. STOICHIOMETRIC RELATIONSHIPS

• Introduction to the particulate nature of matter and chemical change
• The mole concept (I reserves this)
• Reacting masses and volumes

2. ATOMIC STRUCTURE

• The nuclear atom
• Electron configuration

3. PERIODICITY 

• Periodic table
• Periodic trends

4. CHEMICAL BONDING AND STRUCTURE

• Ionic bonding and structure (done! will be uploaded shortly)
• Covalent bonding (done & uploaded)
• Covalent structures (done & uploaded)
• Intermolecular forces
• Metallic bonding (done & uploaded)

12. ATOMIC STRUCTURE ahl

• Electrons in atoms 

13. THE PERIODIC TABLE - TRANSITION METALS ahl

• First-row d-block elements
• Coloured complexes