8. Journey Inside the Atom - Notes & Summary | Class 9 Science Exploration

In this video we will study Notes and Summary of Chapter 8 - "Journey Inside the Atom" taken from Class 9 / Grade Science NCERT Textbook - Exploration.

Chapters:
00:15 - Introduction
01:24 - Rediscovering the Roots of Atomic Theory
02:19 - Dalton’s Atomic Theory
02:54 - A Short Historical Journey Through Atomic Models
03:18 - Thomson’s Model of an Atom
04:52 - Testing Thomson’s Model: The Gold Foil Experiment
05:59 - Rutherford’s Model of an Atom
07:10 - Limitations of Rutherford’s Model
07:49 - Discovery of the Proton
08:32 - Bohr’s Model of the Atom
10:28 - What Components Contribute to the Mass of an Atom?
10:59 - Discovery of the Neutron
11:20 - Subatomic Particles
12:00 - Symbols of Elements
13:23 - Names of some common elements and their symbols
14:20 - Atomic Number
15:49 - Mass Number
17:29 - How Are Electrons Distributed in Different Energy Levels?
20:54 - Combining Capacity of an Atom: Valency
21:49 - Valency
24:02 - Valency of First 18 Elements
25:03 - Isotopes
27:33 - Average Atomic Mass
28:41 - Isobars
29:20 - Difference Between Isotopes and Isobars
30:07 - Important Formulae
31:00 - Important Terms
32:02 - Chapter Summary: At a Glance
33:49 - Quick Revision Points

Thank You for watching.

#class9 #science #exploration #ncerthinditutor #notes #summary #chemistry

Видео 8. Journey Inside the Atom - Notes & Summary | Class 9 Science Exploration канала NCERT Hindi Tutor