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Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 9 (60 MCQs)

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1. Atomic mass-Atomic Number =
2. If N shell has s, p, d and f orbitals. How many electrons are present in N shell?
3. Correct electronic configuration of copper is
4. Which of the following relates to photons both as wave motion and as a stream of particles?
5. When the electron of a hydrogen atom jumps from n=4 to n=1 state, the number of spectral lines emitted is
6. What is the outer shell of an atom called?
7. There may be a maximum of ..... p orbitals at a given energy level.
8. The atomic numbers of four elements A, B, C and D are 12, 13, 15 and 3 respectively. The element whichcannot form a cation is:
9. In order for an atom to be neutral what has to be true?
10. An element is defined by its number of
11. What are the possible values of four quantum numbers (n, l, m, s) for an electron in 4f orbital.
12. $_{19}$K$^{39}$ and $_{20}$Ca$^{40 }$are:
13. An element has 16 protons and 32 nucleons in its nucleus, how many neutrons are present in the atom?
14. An atom becomes negatively charged by
15. Breaking of water molecules to get its constituent elements by passing electric current through it, is called
16. Which is transition element
17. Boron and Nitrogen have same valency?
18. 9-An element has 2 electrons in K shell, 8 electrons in L shell, 13 electrons in M shell and one electron in N shell. The element is
19. What is the difference in the number of electrons in an atom of silicon (Si) and an atom of iodine (I)?
20. Atoms having the same mass number but different atomic numbers are called?
21. Which of the following pairs of sub-atomic particles are inside the nucleus of the atom?
22. He found that atoms have smaller parts and found negative electrons that he theorized were surrounded in a sphere of positive charges
23. The electronic configuration of Cl is (Atomic number-17)
24. This subatomic particle is found outside the nucleus.
25. Two atoms of the same element but with different mass numbers are called .....
26. The least energy shell is?
27. What does the nucleus of an atom contain?
28. ELECTRONS REVOLVE IN DISCRETE ENERGY SHELLSTHIS WAS PROPOSED BY
29. An atom of a certain element has 14 protons, 14 electrons, and a mass number of 27. At room temperature it serves as an excellent semiconductor. How many neutrons are in this atom?
30. Which of these particles was discovered first?
31. The region where this probability density function reduces to zero is called .....
32. All of the following were theorized by Bohr in his description of the atom except
33. The ion of an element has 2 positive charge. Mass number of the atom is 24 and the number of neutrons is 12. What is the number of electrons in the ion?
34. This subatomic particle is much smaller than the other two.
35. P-32 is used in the treatment of-
36. Sum of unpaired electrons in orbital with l=2 in all species fe2+ and ni2+
37. Is an atom has 7 electrons and 7 neutrons, then its atomic number and mass number will be ..... and ..... respectively
38. Two electrons in an atom cannot have the same set of all the four quantum numbers, was given by
39. Adding electrons to an atom makes a(n)
40. An element that has 9 protons, 9 electrons, and 10 neutrons. What is the atomic number?
41. An atom has atomic number 20, what is the number of electrons in the M-shell?
42. Which has exceptional configuration
43. Which subatomic particle is found in the nucleus and has a positive charge?
44. Subsidiary quantum number values are follows
45. The charge on the nucleus of an atom is .
46. What is the mass of an Osmium (Os) atom that has 76 neutrons and 76 electrons
47. What is the amount of matter in an object?
48. O is the symbol for .....
49. Which of the following best describes an electron?
50. Where is the neutron located?
51. Rutherford's 'alpha ($\alpha$) particles scattering experiment' resulted in todiscovery of
52. The total number of atomic orbitals in 4$^{th}$ energy level of an atom is
53. What are the subatomic particles?
54. Which of the following elements is not present in the first twenty elements?
55. Who was the Greek philosopher who called the smallest particle of matter an "atom" ?
56. An atom has atomic mass 16u and atomic number of 8. How many neutrons are present in the atom?
57. True or False:Electrons are found in the nucleus.
58. An atom has mass 15u. If the number of neutrons is 7, what is the number of electrons?
59. What atom matches this electron configuration?1s$^{2}$2s$^{2}$2p$^{6}$3s$^{2}$3p$^{6}$4s$^{1}$3d$^{10}$
60. Mass of an atom is concentrated
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