Kossel-Lewis Approach To Chemical Bonding
Chapter Name : Chemical Bonding And Molecular Structure |
Sub Topic Code : 102_11_04_02_02 |
Topic Name : Kossel-Lewis Approach To Chemical Bonding |
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Sub Topic Name : Octet rule |
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Introduction
• “Atoms can combine either by transfer of valence electrons from one atom to another (gaining or losing) or by sharing of valence electrons in order to have an octet in their valence shells (outermost shells). This is known as octet rule.” • Transfer of electrons is called ionic bonding and sharing of electrons gives rise to covalent bonding.
Pre-Requisites:
Matter, noble gases, molecules, atoms, periodic table, chemical bond
Activity:
All matter, piece of wood, bucket, chalk, universe are all composed of molecules
Real Life Question:
How does matter form?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Electrostatic bond | • The bond formed, as a result of the electrostatic attraction between the positive and negative ions was termed as the electrovalent bond. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Magnet and iron object | See how attractive forces exist between the magnet and the iron object. Similarly a chemical bond is formed between two atoms. |
Real life uses :
Bonding helps to bring stability, stable octet in case of chemical species.
Places to visit :
Kitchen, garage, park, garden
Practical examples around us
| Examples | Explainations |
|---|---|
| Wood, water, salt | All matter is made up of molecules. Molecules are made from atoms by chemical bonding. |
What you learn in Theory:
Chemical bonding takes place as all atoms want to attain a stable octet in their valence shell configuration.
What you learn in Practice:
Chemical bonding helps to make different types of substances. Bonding takes place as all elements attempt to get a stable octet in their valence shells.