Bond Parameters
Chapter Name : Chemical Bonding And Molecular Structure |
Sub Topic Code : 102_11_04_04_01 |
Topic Name : Bond Parameters |
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Sub Topic Name : Bond Length |
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Introduction
• Bond length is defined as the distance between the nuclei of two bonded atoms in a molecule. • The covalent radius is measured approximately as the radius of an atom’s core which is in contact with the core of another atom in a bond . • The van der Waals radius is the overall size of the atom which includes its valence shell in a non-bonded situation.
Pre-Requisites:
Chemical bond, ionic bond, Van der Waals forces
Activity:
Measuring lengths of objects is important to determine the physical space they occupy.
Real Life Question:
How can you find out the size of molecules?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Bond length | • Bond length is defined as the distance between the nuclei of two bonded atoms in a molecule. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Measuring tape, two basket balls | Measure the distance between the centre of one basketball with the centre of another basket ball kept close to each other. |
Real life uses :
Bond length helps to determine the space molecules occupy in a structure.
Places to visit :
Playground
Practical examples around us
| Examples | Explainations |
|---|---|
| Physical objects | All physical objects (living –nonliving) have physical dimensions .e.g. length. |
What you learn in Theory:
Bond length is a physical dimension which tells the size of a molecules.
What you learn in Practice:
Bond length helps to compare sizes of molecules.