• Skip to main content
  • Skip to secondary menu
  • Skip to primary sidebar

Class Notes

Free Education for All

  • Class 1-5
  • Class 6
  • Class 7
  • Class 8
  • Class 9
  • Class 10
  • Class 11
  • Class 12
  • NCERT Solutions
    • NCERT Books
Home » Class 9 » Structure of an atom » Bohr’s model of an atom

Bohr’s model of an atom

Last Updated on March 20, 2019 By Mrs Shilpi Nagpal 7 Comments

Question 1 Describe Bohr’s model of an atom?

Question 2 How did Neil Bohr’s explain the stability of atom?

Question 3 Why is an atom neutral inspite of the presence of charged particle in it?

Bohr’s Model Of An Atom
1)An atom is made up of three particles:electrons,protons and neutrons.Electrons have negative charge,protons have positive charge whereas neutrons have no charge.Due the presence of equal number of negative electrons and positive protons,the atom on the whole is electrically neutral.

2)The protons and neutrons are located in a small nucleus at the centre of an atom.Due to the presence of protons,nucleus is positively charged.
3)The electrons revolve around the nucleus in fixed circular paths called energy levels or shells.The energy levels or shells are represented in two ways:
a)K,L,M,N…….
b)1,2,3,4,5……

bohr model
4)The first energy level or k shell can hold maximum of 2 electrons.

The second energy level or L shell can hold maximum of 8 electrons.

The third energy level or M shell can hold maximum of 18 electrons.

The fourth energy level or N shell can hold maximum of 32 electrons.

electrons in different shells
5)Each energy level or shell is associated with fixed amount of energy.There is no change in energy as long as they keep revolving in same energy level.

6)The change in energy of an electron take place when it

a)Jumps from lower energy level to higher energy level(gain energy)

b)Jumps from higher energy level to lower energy level(Loses energy)

Filed Under: Class 9, Structure of an atom Tagged With: bohr's model of an atom, electrons, energy level, K shell, L shell, M shell, N shell, neutrons, protons, shells

About Mrs Shilpi Nagpal

Author of this website, Mrs Shilpi Nagpal is MSc (Hons, Chemistry) and BSc (Hons, Chemistry) from Delhi University, B.Ed (I. P. University) and has many years of experience in teaching. She has started this educational website with the mindset of spreading Free Education to everyone.

Reader Interactions

Comments

  1. Sumer says

    December 9, 2018 at 10:50 pm

    Best

    Reply
  2. samara says

    January 19, 2019 at 2:58 am

    really nice context…. i love it!!!!!

    Reply
  3. Kavitha says

    March 10, 2019 at 3:56 pm

    Thanks

    Reply
  4. Rajnish says

    March 11, 2019 at 1:17 am

    Osm

    Reply
  5. Neeraj sandhu says

    March 19, 2019 at 10:14 am

    Thanks

    Reply
  6. azhar says

    October 12, 2020 at 1:18 pm

    it is the best description

    Reply
  7. Chilin Pangilinan says

    November 1, 2020 at 2:36 pm

    Very good article and very helpful. Thank you!

    Reply

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Primary Sidebar

Recent Posts

  • NCERT Solutions for Class 10 हिन्दी – क्षितिज – Chapter 6 – यह दंतुरहित मुस्कान और फसल
  • NCERT Solutions for Class 10 हिन्दी – क्षितिज – Chapter 5 – उत्साह और अट नहीं रही है
  • NCERT Solutions for Class 10 हिन्दी – क्षितिज – Chapter 4 – आत्मकथ्य
  • Werner’s Coordination Theory
  • NCERT Solutions for Class 10 हिन्दी – क्षितिज – Chapter 3 – सवैया, कवित्त – देव
  • NCERT Solutions for Class 10 हिन्दी – क्षितिज – Chapter 2 – राम लक्ष्मण परशुराम संवाद
  • Coordination Compounds
  • अलंकार
  • NCERT Solutions for Class 10 हिन्दी – क्षितिज – Chapter 1 – पद
Copyright © 2016-20 | About Us | Contact Us | Privacy Policy | Facebook | Pinterest | Twitter