Structure Of The Atom
Chapter Name : Structure Of The Atom |
Sub Topic Code : 102_09_04_02_01 |
Topic Name : Structure Of The Atom |
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Sub Topic Name : Thomson's Model Of An Atom |
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Introduction
• Scientists needed a new theory which can explain how electrons and protons are arranged in an atom after( the failure of Daltons theory. • JJ Thomson first proposed the model for the structure of an atom. • His model proposed that : 1) An atom consists of a positively charged sphere and the electrons are embedded in it. 2) The negative and positive charges are equal in magnitude. So the atom as a whole is electrically neutral.
Pre-Requisites:
Daltons atomic theory, molecules
Activity:
Atoms are the smallest units of any substance.
Real Life Question:
What does an atom look like?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Atom | Smallest unit of a compound. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Watermelon | Red part of watermelon -> positive charge Seeds -> negative charge |
Real life uses :
Atoms make up all substances.
Places to visit :
Laboratory.
Practical examples around us
| Examples | Explainations |
|---|---|
| Watermelon | Red part of watermelon -> positive charge Seeds -> negative charge |
What you learn in Theory:
• Scientists needed a new theory which can explain how electrons and protons are arranged in an atom after( the failure of Daltons theory. • JJ Thomson first proposed the model for the structure of an atom. • His model proposed that : 1) An atom consists of a positively charged sphere and the electrons are embedded in it. 2) The negative and positive charges are equal in magnitude. So the atom as a whole is electrically neutral.
What you learn in Practice:
Atoms are the smallest unit of any substance.