Charged Particles In Matter
Chapter Name : Structure Of The Atom |
Sub Topic Code : 102_09_04_01_01 |
Topic Name : Charged Particles In Matter |
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Sub Topic Name : Charged Particles In Matter |
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Introduction
· In 1886 E. Goldenstein's experiments led to discovery of protons, positively charged particle in an atom.
· In 1900, J.J. Thomson found electrons, negatively charged particles in an atom.
· Thus it meant that atom is divisible. Everything is made up of atoms.
· An atom is divisible and consists of charged particles
Pre-Requisites:
Daltons atomic theory, molecules
Activity:
See how bits of paper get attracted to a comb rubbed on dry hair.
Real Life Question:
Why do bits of paper stick to a comb rubbed on dry
hair?
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 |
|---|---|
| Comb, dry hair, bits of paper | Rub a comb on dry hair and keep it close to bits of paper. |
Real life uses :
Atoms make up all substances.
Places to visit :
Room.
Practical examples around us
| Examples | Explainations |
|---|---|
| Bits of paper attracted by comb rubbed on dry hair | Comb and paper is made up of atoms. Atoms are made up of charged particles. The comb attracted the paper due to the charge attraction between the proton and the electron charged particles. |
What you learn in Theory:
· In 1886 E. Goldenstein's experiments led to discovery of protons, positively charged particle in an atom.
· In 1900, J.J. Thomson found electrons, negatively charged particles in an atom.
· Thus it meant that atom is divisible. Everything is made up of atoms.
· An atom is divisible and consists of charged particles
What you learn in Practice:
Atoms are the smallest unit of any substance.