The document discusses the continuum of bonding types—ionic, covalent, and metallic—and how they can be represented in a bonding triangle. It covers the classification of materials based on their uses, properties, and structure, referencing a Van Arkel-Ketelaar diagram to position various compounds. Additionally, it addresses topics like electrical conductivity, elasticity, brittleness, and ductility in the context of different material types.

1. Ppt 11 S2.4
From Models
to Materials
Structure
2.4 From models to materials
SL
&HL
Structure
2.4.1
Bonding is best described as a
continuum between the ionic,
covalent and metallic models, and
can be represented by a bonding
triangle.
SL
&HL
Structure
2.4.2
The position of a compound in the
bonding triangle is determined by
the relative contributions of the
three bonding types to the overall
bond.
What role do bonding and structure have in the design of materials?

2. How are materials
classified?
• Material are classified on basis of following:
• Their Uses
• Their properties
• Their bonding and Structure

3. A simple
bonding
triangle

4. Van Arkel-ketelaar diagram

5. State the coordinates and position of the
following on Arkel-Ketelaar diagram
• CF4
• SiCl4
• SiO2
• Mg
• Li2O
• AlCl3
• CO2

6. Practice questions

7. Answers

8. Physical characteristics and Bonding & structure

9. Electrical conductivity
Discuss: Electrical conductivity in metals, ionic,
covalent and semiconductors

10. Discuss: Elasticity

11. Discuss Brittleness and Ductile

12. Summary

13. Complete End-of–topic questions