Valence Bond Theory
Chapter Name : Chemical Bonding And Molecular Structure |
Sub Topic Code : 102_11_04_06_05 |
Topic Name : Valence Bond Theory |
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Sub Topic Name : Types Of Overlapping And Nature Of Covalent Bonds |
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Introduction
• There are two types of covalent bonds: sigma and pi bond. • Sigma bond is of three types : ss overlap, sp overlap and pp overlap. • Pi bond are formed by the overlap of pp overlap but in a different orientation.
Pre-Requisites:
Covalent bond, molecule , orbital
Activity:
Overlapping orbitals are like tomato slices kept in such a way that they overlap.
Real Life Question:
How do covalent bonds form?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Covalent bond | Covalent bonds form when there is sharing of electrons between two atoms. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Ball, dumbbell | A ball is similar to an s orbital and a dumb bell is like p orbital of atoms. |
Real life uses :
Type of molecular structure and molecule formed depends on the type of covalent bonding.
Places to visit :
Kitchen, gym, playground
Practical examples around us
| Examples | Explainations |
|---|---|
| Dumbbell, slices of tomato | Dumbbell is like the shape of a p orbital and like slices of tomato kept over each other, orbitals overlap in the same way making a bond. |
What you learn in Theory:
Covalent bonds are of two types depending on the type of overlapping orbitals and their arrangement.
What you learn in Practice:
Type of covalent bond forms depending on the degree and type of overlapping orbitals.