Lesson 2: Group 13 Elements (Boron Family)
This lesson focuses on the properties and compounds of Group 13 elements: Boron (B), Aluminum (Al), Gallium (Ga), Indium (In), and Thallium (Tl).
- Anomalous Behavior of Boron: Boron, being the first member of the group, exhibits a unique behavior due to its small size and high ionization enthalpy. It forms covalent compounds and exists in various allotropic forms.
- Important Compounds of Boron: Students will study the structure, preparation, and properties of key boron compounds:
- Diborane (): Its unique structure with two three-center two-electron bonds (banana bonds).
- Borax (): Its structure, properties, and the borax bead test.
- Boric Acid (): Its preparation and its unique Lewis acid character.
- Important Compounds of Aluminum: This part covers the amphoteric nature of aluminum and the preparation and properties of compounds like aluminum oxide ()
