Atomic Structure Mcqs Class 11 test 1

1. half filled orbitals are  stable due to

2. Magnetic quantum number tells about the

3. The spectrum given by element  is

4. As we move to higher energy level thae difference of energy between the successive energy levels

5. with the increase of shielding effect ionization energy

6. The idea that radiation also have particle nature was given by

7. The idea of Wave nature of electrons was proposed by

8. which one of the following has the largest ionization energy

9. which of the following statement is not correct about the changes from left to right along the second period of the periodic table

10. the rules violated  in the configuration  ⁷N= 1s²  2s²    2Px    2Py¹     is

11. an atom is said to be an excited state if anyone of its electron is in

12. Isotopes of an element have_______.

13. The filling of electrons in the orbitals takes place according to

14. for  an orbital that spin quantum number describe that

15. The notation used to indicate the number of electrons present in a given energy level is

16. The electronic configuration of 24Cr is {Ar}............

17. The maximum number of electrons which can be accommodated in a given subshell is

18. For azimuthal quantum number 1, the total number of orbital ( value of m ) are

19. The maximum number of electrons in d orbital are

20. The magnetic quantum number gives the

21. The azimuthal quantum number governs the

22. The principal quantum number governs the

23. Bohr's orbit is replaced by the region in which the probability of finding the electron is maximum. This is due to

24. The Spectral line obtained when electron jumps from 5th orbit to the 3rd orbit is the

25. The spectrum of hydrogen atom consists of five series. Name  the  series which lies in the visible range:

26. Atomic radius, r directly proportional to n² . So energy E directly proportional to.

27. In Bohr's atom model, a revolving electron does not radiate energy as it's angular momentum is

28. In 1912 , Rutherford discovered

29. Mosely found that the wave length of X-rays emitted decrease regularly with increasing

30. X-rays were discovered in 1895 by

31. Atomic number or the nuclear charge is the one that distinguishes one element from the other. It was discovered by

32. X-rays were produced when the anode or a metal plate is bombarded by the fast moving

33. The deflection of few positively charged particles by a very thin Gold foil suggests the presences of positively charged

34. Samples of the same elements always emit the same characteristics spectrum comprising the same

35. The dispersion of components of a particular radiation by prism containing a band of rays of different wave lengths is called .

36. Neutron was discovered in a nuclear reaction of Be-9 by alpha particle 1932 by

37. with the emission of beta particle, from a nuclei , the charge number

38. With the emission of alpha particles from an nuclei , mass number decrease by

39. The radioactive radiations which are not reflected by electrical magnetic fields are

40. The lighter elements can be made radioactive by irradiating them with the

41. With the increase of neutrons in the stable nucleus of an element it becomes unstable and hence it emits

42. Experiments with different electrodes and  residual gasses in discharge tube give the e/m value.

43. The highest e/m value for positive ions is obtained if discharged tube contains

44. Positive rays are not emitted by the anode . These rays are produced in a discharge tube by collision of cathode rays with

45. Positive rays were produced in a discharge tube by making

46. Rutherford's scattering experiment showed that an atom possesses

47. Sunlight gives spectrum which is

48. The charge to mass (e/m) ratio of cathode rays is

49. Streams of negativity charged particles in a discharge tube is known as