CBSE Class 11 Chemistry Structure Of Atom Notes Set A

Download CBSE Class 11 Chemistry Structure Of Atom Notes Set A in PDF format. All Revision notes for Class 11 Chemistry have been designed as per the latest syllabus and updated chapters given in your textbook for Chemistry in Class 11. Our teachers have designed these concept notes for the benefit of Class 11 students. You should use these chapter wise notes for revision on daily basis. These study notes can also be used for learning each chapter and its important and difficult topics or revision just before your exams to help you get better scores in upcoming examinations, You can also use Printable notes for Class 11 Chemistry for faster revision of difficult topics and get higher rank. After reading these notes also refer to MCQ questions for Class 11 Chemistry given on studiestoday

Revision Notes for Class 11 Chemistry Chapter 2 Structure of Atom

Class 11 Chemistry students should refer to the following concepts and notes for Chapter 2 Structure of Atom in Class 11. These exam notes for Class 11 Chemistry will be very useful for upcoming class tests and examinations and help you to score good marks

Chapter 2 Structure of Atom Notes Class 11 Chemistry

 

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13. o Emission spectrum: The spectrum of radiation emitted by a substance that has absorbed energy is called an emission spectrum.

14. o Absorption spectrum : The spectrum obtained when radiation is passed through a sample of material. The sample absorbs radiation of certain wavelengths. The wavelengths which are absorbed are missing and come as dark lines.

15. Bohr’s model for hydrogen atom:

a.An electron in the hydrogen atom can move around the nucleus in a circular path of fixed radius and energy. These paths are called orbits orenergy levels. These orbits are arranged concentrically around the nucleus.

b. As long as an electron remains in a particular orbit, it does not lose or gain energy and its energy remains constant.

c. When transition occurs between two stationary states that differ in energy, the frequency of the radiation absorbed or emitted can be calculated

d. An electron can move only in those orbits for which its angular momentum is an integral multiple of h/2π The radius of the nth orbit is given by rn =52.9 pm x n2/Z

energy of electron in nth orbit is :

CBSE Class 11 Chemistry Revision Structure of Atom 1

 

16. Black body: An ideal body, which emits and absorbs all frequencies,is called a black body. The radiation emitted by such a body is called black body radiation.

CBSE Class 11 Chemistry Revision Structure of Atom 2

 

17. Photoelectric effect: The phenomenon of ejection of electrons from the surface of metal when light of suitable frequency strikes it is called photoelectric effect. The ejected electrons are called photoelectrons.
CBSE Class 11 Chemistry Revision Structure of Atom 3

 

18. Threshold frequency (vo): For each metal there is a characteristic minimum frequency below which photoelectric effect is not observed. This is called threshold frequency.

 

19. Heisenberg uncertainty principle: It is impossible to determine simultaneously the exact position and exact momentum of an electron. Mathematically, Δx x Δp ≥ h/ 4 π

 

20. Quantum number’s: These are the numbers obtained by solution of Schrodinger equation used to define the energy of electron its position, orientation and spinning.

 

21. There are four quantum numbers namely principal, azimuthal, magnetic and spin quantum no.
 
22. Bohr burry’s rule:- The lower the value of (n + l) for an orbital, the lower is its energy. If two orbitals have the same value of (n + l), the orbital with lower value of n will have the lower energy.
 
23. Degenerate orbitals The orbitals having the same energy are called degenerate orbitals.
 
24. Aufbau principle: electron filled in various subshell in increasing order of their energies.
1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s……….
CBSE Class 11 Chemistry Revision Structure of Atom 4
 
25. Pauli’s exclusion principle: No two electrons in an atom can have same set of four quantum numbers.

 

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Chapter 01 Some Basic Concepts of Chemistry
CBSE Class 11 Chemistry Basic Concepts Of Chemistry Notes

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CBSE Class 11 Chemistry Chapter 2 Structure of Atom Notes

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Notes for Chemistry CBSE Class 11 Chapter 2 Structure of Atom

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Chapter 2 Structure of Atom Notes for Chemistry CBSE Class 11

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Chapter 2 Structure of Atom CBSE Class 11 Chemistry Notes

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Notes for CBSE Chemistry Class 11 Chapter 2 Structure of Atom

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