This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Chemistry Part I > Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom – Quiz 8 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 8 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. He proposed the particle theory of matter and called nature's most basic particle the "atomos" A) Millikan. B) Democritus. C) Aristotle. D) Chadwick. Show Answer Correct Answer: B) Democritus. 2. Based on the model above, students can conclude all the following valid claims EXCEPT A) Each neutron is electrically neutral. B) The nucleus carries a positive electrical charge. C) Electrons are continuously orbiting the nucleus. D) Electrons are negatively charged particles. Show Answer Correct Answer: C) Electrons are continuously orbiting the nucleus. 3. Mass minus Atomic Number Equals (M-A=?) A) Nucleus. B) Protons. C) Atom. D) Neutrons. Show Answer Correct Answer: D) Neutrons. 4. Which of the following quantum number have both positive and negative values A) Principle Quantum Number. B) Azimuthal Quantum Number. C) Magnetic Quantum Number. D) None of these. Show Answer Correct Answer: C) Magnetic Quantum Number. 5. Electron dot notation is ..... A) A representation of an element in which only valence electrons of an atom are shown. B) A representation of how compounds are formed. C) All the above. D) None of the above. Show Answer Correct Answer: A) A representation of an element in which only valence electrons of an atom are shown. 6. Which model of the atom is also known as the 'plum pudding model'? A) Bohr's model. B) Dalton's model. C) Rutherford's model. D) Thomson's model. Show Answer Correct Answer: D) Thomson's model. 7. An electron is approximately 0.05% of the mass of a proton. Protons and neutrons each have a mass of 1 amu. Which of the following best describes the relationship between mass and subatomic particles? A) The mass of an electron is equal to that of a neutron. B) Atomic mass is the total number of protons and electrons. C) A neutron has 0.05% more mass than an electron. D) The nucleus comprises over 99% of the atom's mass. Show Answer Correct Answer: D) The nucleus comprises over 99% of the atom's mass. 8. Which of the following statements is true regarding the line spectrum of hydrogen? A) The first line in each series has the longest wavelength. B) The ionisation energy of hydrogen can be calculated using the line with the lowest frequency in the ultra-violet region. C) The lines are all equally spaced. D) The lines converge when the wavelength increases. Show Answer Correct Answer: A) The first line in each series has the longest wavelength. 9. The number of orbitals present in the shell with principal quantum number n=3 is ..... A) 18. B) 6. C) 36. D) 9. Show Answer Correct Answer: A) 18. 10. What does the 1 in "1s" stand for? A) S orbitals. B) P orbitals. C) Energy level. D) The number of electrons. Show Answer Correct Answer: C) Energy level. 11. Which particle is responsible for creating ions? A) Protons. B) Neutrons. C) Electrons. D) None of the above. Show Answer Correct Answer: C) Electrons. 12. Which of the following best describes the Bohr model atom? A) Electrons are in the nucleus of an atom. B) It shows that electrons are evenly scattered in the atom. C) It showed that electrons can be found anywhere in the atom. D) Electrons are in orbits around the nucleus. Show Answer Correct Answer: D) Electrons are in orbits around the nucleus. 13. How is an element identified? A) By its number of neutrons and protons. B) By its number of protons. C) By its number of electrons. D) By its number of neutrons. Show Answer Correct Answer: B) By its number of protons. 14. Which of the following would give you the number of neutrons in an atom? A) Mass number + atomic number. B) Mass number. C) Atomic number. D) Mass number-atomic number. Show Answer Correct Answer: D) Mass number-atomic number. 15. He discovered the neutron in the nucleus and completed the current atomic model. A) Ernest Rutherford. B) James CHadwick. C) J.J. Thomson. D) Niels Bohr. Show Answer Correct Answer: B) James CHadwick. 16. How many electrons can be present in n=4 shell? A) 12. B) 18. C) 32. D) 20. Show Answer Correct Answer: C) 32. 17. Atoms can gain or lose what? A) Protons. B) Neutrons. C) Electrons. D) None of the above. Show Answer Correct Answer: C) Electrons. 18. What mass does a neutron have? A) 2 amu. B) 1 amu. C) 0 amu. D) 11 amu. Show Answer Correct Answer: B) 1 amu. 19. A subatomic particle that has a positive charge is known as a(n) A) Proton. B) Neutron. C) Isotope. D) Electron. Show Answer Correct Answer: A) Proton. 20. All the substances are made up of tiny particles called A) Atoms. B) Electrons. C) Protons. D) Nucleus. Show Answer Correct Answer: A) Atoms. 21. ISOTOPES OF ELEMENTS HAVE SAME A) MASS NO. B) NO OF NEUTRONS. C) PHYSICAL PROPERTIES. D) CHEMICAL PROPERTIES. Show Answer Correct Answer: D) CHEMICAL PROPERTIES. 22. The second energy level can hold up to, how many electrons? A) 12. B) 2. C) 8. D) 10. Show Answer Correct Answer: C) 8. 23. What is the MOST important subatomic particle when it comes to identifying the name of an atom? A) Nucleus. B) Neutron. C) Proton. D) Electron. Show Answer Correct Answer: C) Proton. 24. Of the atom's mass is located in the A) Nucleus. B) Electrons. C) Neutrons. D) Protons. Show Answer Correct Answer: A) Nucleus. 25. Balmer series of the hydrogen spectrum lies in the ..... region A) Visible. B) Far Infrared. C) UV. D) Near Infrared. Show Answer Correct Answer: A) Visible. 26. How many number of shells are in nitrogen? A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: B) 2. 27. An element with a mass number of 11 and an atomic number of 5 has how many neutrons? A) 5. B) 11. C) 16. D) 6. Show Answer Correct Answer: D) 6. 28. What numbers on the Periodic Table tell you how many valence electrons an element has? A) The numbers attached to the A's and B's at the top of each group. B) The numbers attached to the periods on the left side of the Periodic Table. C) The numbers located inside each box on the Periodic Table. D) None of the above. Show Answer Correct Answer: A) The numbers attached to the A's and B's at the top of each group. 29. 1s$^{2}$, 2s$^{2}$, 2p$^{3}$ represents A) O. B) N. C) F. D) Na. Show Answer Correct Answer: B) N. 30. The revolution of the electron in a circular orbit is not expected to be stable, this is because A) There is no acceleration in a uniform circular motion. B) During acceleration, charged particles would radiate energy. C) Charged particles can never undergo circular motion. D) None. Show Answer Correct Answer: B) During acceleration, charged particles would radiate energy. 31. Which element in the compound Li$_{3}$HMg$_{4 }$ would have the most protons in its nucleus? A) Li. B) H. C) Mg. D) None of the above. Show Answer Correct Answer: C) Mg. 32. The lightest particle in the atom is A) Proton. B) Neutron. C) Electron. D) None of the above. Show Answer Correct Answer: C) Electron. 33. What do carbon-12 and carbon-14 have in common? A) They have the same number of neutrons. B) They have the same atomic mass. C) They have the same atomic weight. D) They have same number of protons. Show Answer Correct Answer: D) They have same number of protons. 34. What is the total number of protons, neutrons, and electrons in a Cadmium atom if that has a mass number of 112 A) 160. B) 64. C) 48. D) 112. Show Answer Correct Answer: A) 160. 35. How many protons, neutrons, and electrons are present in an atom of Barium (Ba) with a mass number of 138? A) 56 protons, 82 neutrons, and 56 electrons. B) 56 protons, 138 neutrons, 82 electrons. C) 56 protons, 81 neutrons, and 56 electrons. D) 56 protons, 56 neutrons, and 56 electrons. Show Answer Correct Answer: A) 56 protons, 82 neutrons, and 56 electrons. 36. He found the positively charged protons in the nucleus and said that electrons moved around the nucleus A) J.J. Thomson. B) Ernest Rutherford. C) James Chadwick. D) Niels Bohr. Show Answer Correct Answer: B) Ernest Rutherford. 37. Nucleus was discovered by ..... in ..... A) Ernest Rutherford, 1911. B) Ernest Rutherford, 1920. C) James Chadwick, 1920. D) James Chadwick, 1911. Show Answer Correct Answer: A) Ernest Rutherford, 1911. 38. This particle determines the element's identity. A) Proton. B) Valence shell. C) Electron. D) Neutron. Show Answer Correct Answer: A) Proton. 39. What sub-atomic particle is this?-Outside the Nucleus-Negatively Charged A) Proton. B) Electron. C) Neutron. D) None of the above. Show Answer Correct Answer: B) Electron. 40. Transition of electron from an excited state to a ground state of n = 5 formed a photon. Which of the following series belongs to this respective transition? A) Brackett. B) Pfund. C) Balmer. D) Paschen. E) Lyman. Show Answer Correct Answer: B) Pfund. 41. Any process where light photons are generated is known as luminescence. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 42. 13-Electronic configuration of Al$^{+3}$ is A) 2, 8. B) 2, 8, 8, 3. C) 2, 8, 8. D) 2, 8, 3. Show Answer Correct Answer: A) 2, 8. 43. 7-For principal quantum number n = 4, the total number of orbitals having l = 3 is A) 9. B) 5. C) 7. D) 3. Show Answer Correct Answer: C) 7. 44. What is an atom that has gained or lost one or more electrons called? A) Isotope. B) Proton. C) Neutron. D) Ion. Show Answer Correct Answer: D) Ion. 45. Which of these best describes a neutron? A) It has no charge and about the same mass as a proton. B) It has a negative charge and about the same mass as a proton. C) It has no charge and about the same mass as an electron. D) It has a negative charge and about the same mass as an electron. Show Answer Correct Answer: A) It has no charge and about the same mass as a proton. 46. According to J.J. Thomson model of atom proton and neutron forms a sphere in which electron resides. true or false A) False. B) True. C) All the above. D) None of the above. Show Answer Correct Answer: A) False. 47. What did Niels Bohr suggest about electrons? A) They do not exist. B) They are static. C) They orbit the nucleus. D) They are part of the nucleus. Show Answer Correct Answer: C) They orbit the nucleus. 48. Who shows the existence of protons in the atoms? A) Chadwick. B) Rutherford. C) Goldstein. D) Bohr. Show Answer Correct Answer: C) Goldstein. 49. Which scientist proposed a new atomic model after discovering the electron in 1897? A) Dalton. B) Thomson. C) Rutherford. D) Bohr. Show Answer Correct Answer: B) Thomson. 50. The electron with which of the following values of quantum numbers is expected to possesshighest energy A) 4, 2, 0, 1/2. B) 5, 0, 0, 1/2. C) 4, 1, 0, -1/2. D) 3, 2, 2, 1/2. Show Answer Correct Answer: A) 4, 2, 0, 1/2. 51. Maximum number of electrons in a subshell with l = 3 and n = 4 is A) 18. B) 12. C) 9. D) 14. Show Answer Correct Answer: D) 14. 52. The atomic number of sodium is 11 and its mass number is 23. It has A) 11 neutrons and 12 protons. B) 12 protons and 11 electrons. C) 11 electrons and 12 neutrons. D) 12 electrons and 11 neutrons. Show Answer Correct Answer: C) 11 electrons and 12 neutrons. 53. To find the atomic mass, we ..... A) Add protons and electrons. B) Add protons and neutrons. C) Subtract protons and neutrons. D) Add neutrons and electrons. Show Answer Correct Answer: B) Add protons and neutrons. 54. Which of the following particles was discovered by Chadwick? A) Alpha particle. B) Proton. C) Neutron. D) Electron. Show Answer Correct Answer: C) Neutron. 55. When U-235 breaks up it produces A) Electrons. B) Neutrons. C) Protons. D) Nothing. Show Answer Correct Answer: B) Neutrons. 56. Planck's constant has the units of A) Work. B) Energy. C) Angular momentum. D) Linear momentum. Show Answer Correct Answer: C) Angular momentum. 57. In a hydrogen atom, an electron which orbital that has can absorb energy but cannot emit energy? A) 1s. B) 2p. C) 3s. D) 3d. Show Answer Correct Answer: A) 1s. 58. Nucleus contains both neutrons and protons A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 59. What carries no charge A) Neutrons. B) Electrons. C) Protons. D) None of the above. Show Answer Correct Answer: A) Neutrons. 60. The smallest part of the element with the properties of the element is the ..... A) Atom. B) Quark. C) Proton. D) Electron. Show Answer Correct Answer: A) Atom. ← PreviousNext →Related QuizzesScience QuizzesClass 11 QuizzesClass 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 1Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 2Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 3Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 4Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 5Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 6Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 7Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books