Classification Of Crystalline Solids
Chapter Name : The Solid State |
Sub Topic Code : 102_12_01_04_01 |
Topic Name : Classification Of Crystalline Solids |
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Sub Topic Name : Molecular Solids |
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Introduction
Molecules/atoms are the constituent particles
Pre-Requisites:
Crystalline solids
Activity:
All molecular solids like iodine , water-ice , dry ice , sulphur are found in liquid / gaseous state at room temperature. You can observe that all these solids have very low melting points and are generally poor conductors.
Real Life Question:
“Ice being a solid, melts so easily at room temperature. Why?”
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Molecular solids London forces | Consists of molecules / atoms Weak dispersion forces between atoms or molecules |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Make a table differentiating the 3 types of molecular solids | Reading it time and again will help you remember the properties |
Real life uses :
Sugar is used by all of us daily.
Places to visit :
Chemistry lab
Practical examples around us
| Examples | Explainations |
|---|---|
| Ice sugar | Molecular solids Molecular solids |
What you learn in Theory:
Molecular solids
What you learn in Practice:
All these solids have low melting points, are soft and are poor conductors.