CBSE Class 11 Chemistry Structure of Atom Worksheet Set C

Read and download free pdf of CBSE Class 11 Chemistry Structure of Atom Worksheet Set C. Download printable Chemistry Class 11 Worksheets in pdf format, CBSE Class 11 Chemistry Chapter 2 Structure of Atom Worksheet has been prepared as per the latest syllabus and exam pattern issued by CBSE, NCERT and KVS. Also download free pdf Chemistry Class 11 Assignments and practice them daily to get better marks in tests and exams for Class 11. Free chapter wise worksheets with answers have been designed by Class 11 teachers as per latest examination pattern

Chapter 2 Structure of Atom Chemistry Worksheet for Class 11

Class 11 Chemistry students should refer to the following printable worksheet in Pdf in Class 11. This test paper with questions and solutions for Class 11 Chemistry will be very useful for tests and exams and help you to score better marks

Class 11 Chemistry Chapter 2 Structure of Atom Worksheet Pdf

STRUCTURE OF ATOM
 
1. Fin d energy of each of the photons which (i) correspond to light of frequency 3× 1015 Hz. (ii) have wavelength of 0.50 Å.
 
2. Ca lculate the de Broglie wavelength of a bullet of mass 2.2 x 10-3 Kg fired with a velocity of 300 m/s.
 
3. Ca lculate the energy absorbed, frequency and wavelength when an electron with energy 217.9 x 10-21 J jumps to an energy level with energy 544.8 x 10-20J.
 
4. Ca lculate the energy and radius of the first orbit of He+ ion.
 
5. Ca lculate the speed of an electron if its de Broglie wavelength is twice its displacement in one second.
 
6. Ca lculate the uncertainty in the velocity of a cricket ball if the mass is 150g. Uncertainty in the position is 1 angstrom.
 
7. An electron beam from an accelerator is with kinetic energy 1.6 x 10-17J. What is its de Broglie wavelength?
 
8. A photon of wavelength 4 × 10–7 m strikes on metal surface, the work function of the metal being 2.13 eV. Calculate
(i) the energy of the photon (eV),
(ii) the kinetic energy of the emission, and
(iii) the velocity of the photoelectron (1 eV= 1.6020 × 10–19J).
 
9. Sh ow that the wavelength related to a 250g ball moving with a speed of 100 m/s is too short to be observed.
 
10. i. State Heisenberg’s uncertainty principle.
ii. The speed of an electron moving at 600m/s is measured to an accuracy of 0.005%. What would be the minimum error in determining its position?
 
11. Tw o particles A and B are in motion. If the momentum of A is half of that of B and if the wavelength of A is 4.5 x 102 nm, what is the wavelength of B?
 
12. W hat is meant by “ Energy of an electron in a hydrogen atom is quantized”
 
13. i. Explain the dual nature of light.
ii. When would the wavelength associated with an electron be equal to the wavelength associated with a proton?
 
14. Ele ctrons are emitted with zero velocity from a metal surface when it is exposed to radiation of wavelength 6800Ao.Calculate the threshold frequency and work function of the metal.
 
15. W hy is the electronic energy of hydrogen negative?
 
16. De fine
i. Photoelectric effect
ii. Black body radiation
 
17. Di fferentiate
i. Absorption and emission spectrum
ii. Orbit and orbital
 
18. W hy is the concept of orbit replaced by the concept of orbital?
 
19. Dr aw the shapes (boundary surfaces) of the following orbitals.
(i)2py (ii) 3dz2  (iii) 3dx 2 – y2
 
20. i) What do you understand by quantum numbers? What is their significance?
ii) Describe the orbital: a) n=2, l=0 b) n=6, l = 4 c) n= 2, l =3
 
21. i) State (n+l) rule.
ii) Give reason: In the building up of atoms, 4s is filled before 3d
 
22. Ho w many electrons are possible in a) 4p b) 5pz c) n=3, l=2 d) n=4, l=2, s=+ ½
 
23. W hy are half filled and completely filled orbitals more stable?
 
24. W ith the help of Pauli’s exclusion principle and the concept of atomic numbers for orbitals,
 
show that an M shell cannot accommodate more than 18 electrons.
 
25. Lis t the quantum numbers of a) unpaired electrons in F , Ni2+ b) valence electrons in P , Ca
 
26. W hat are the possible values of l and m for a) n=3 b) n=2
 
27. (a) How many electrons in an atom may have the following quantum number?
(i) n = 4 ms = +1/2          (ii) n = 3 , l = 0
(b) What are the atomic numbers of elements whose outermost electrons are represented by
(i) 3s1          (ii) 2p3           (iii) 3d6
 
28. Ba sed on Bohr Bury rules arrange the following orbital’s in the increasing order of energy.
(i) 5f , 4d , 7s , 7p    (ii) 5p , 4d , 5d , 4f , 6s
 
29. Di scuss the similarities and differences (two each) between a 1s and a 2s orbital.
 
30. i . Which is more stable a) Mn2+ or Mn3+ b) Fe2+ or Fe3+ ? Give reason.
ii. Electronic configuration in Copper is [Ar] 4s1, 3d10 and not [Ar] 4s2, 3d9
iii. Among the following pairs of orbitals which orbital will experience the larger effective nuclear charge? (i) 2s and 3s, (ii) 4d and 4f, (iii) 3d and 3p.


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Chapter 2 Structure of Atom CBSE Class 11 Chemistry Worksheet

The above practice worksheet for Chapter 2 Structure of Atom has been designed as per the current syllabus for Class 11 Chemistry released by CBSE. Students studying in Class 11 can easily download in Pdf format and practice the questions and answers given in the above practice worksheet for Class 11 Chemistry on a daily basis. All the latest practice worksheets with solutions have been developed for Chemistry by referring to the most important and regularly asked topics that the students should learn and practice to get better scores in their examinations. Studiestoday is the best portal for Printable Worksheets for Class 11 Chemistry students to get all the latest study material free of cost. Teachers of studiestoday have referred to the NCERT book for Class 11 Chemistry to develop the Chemistry Class 11 worksheet. After solving the questions given in the practice sheet which have been developed as per the latest course books also refer to the NCERT solutions for Class 11 Chemistry designed by our teachers. After solving these you should also refer to Class 11 Chemistry MCQ Test for the same chapter. We have also provided a lot of other Worksheets for Class 11 Chemistry which you can use to further make yourself better in Chemistry.

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