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 14 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 14 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A neutral atom (atomic number > 1) has A) Electron and proton. B) Neutron and electron. C) Neutron, electron and proton. D) Neutron and proton. Show Answer Correct Answer: C) Neutron, electron and proton. 2. He found that electrons have specific amounts of energy and move in specific orbits around the nucleus, like planets orbiting the sun. A) J.J. Thomson. B) Ernest Rutherford. C) James Chadwick. D) Niels Bohr. Show Answer Correct Answer: D) Niels Bohr. 3. What is the charge and location of a proton? A) Protons have a positive charge and are in the nucleus. B) Protons have a negative charge and are in the nucleus. C) Protons have a positive charge and are in the electron cloud. D) Protons have a neutral charge and are in the nucleus. Show Answer Correct Answer: A) Protons have a positive charge and are in the nucleus. 4. The relative mass of a proton/neutron is ..... A) 0. B) 3. C) 1. D) 2. Show Answer Correct Answer: C) 1. 5. What are atoms of an element having the same number of protons but a different number of neutrons called? A) Proton. B) Neutron. C) Ion. D) Isotope. Show Answer Correct Answer: D) Isotope. 6. What information does the Atomic Number on an element's key give us? A) Total number of protons and neutrons. B) Number of electrons only. C) Number of neutrons only. D) Number of protons only. Show Answer Correct Answer: D) Number of protons only. 7. What sub-atomic particle is this?-Found the Nucleus-No Charge A) Proton. B) Electron. C) Neutron. D) None of the above. Show Answer Correct Answer: C) Neutron. 8. Which of the following parts of an atom are positively charged? A) Nucleus. B) Proton. C) Neutron. D) Electron. Show Answer Correct Answer: B) Proton. 9. Which particles are neutral and located in the nucleus of an atom? A) Mass. B) Atom. C) Neutron. D) Proton. Show Answer Correct Answer: C) Neutron. 10. The electron arrangement of O is 2, 6. How many protons does O have? A) 8. B) 6. C) 10. D) 2. Show Answer Correct Answer: A) 8. 11. The emission spectrum of hydrogen atom is a line spectrum because A) Energy is required to excite an electron. B) Electrons which are unstable will radiate energy. C) An excited electron has a higher energy and is not stable. D) The energy of an electron an a hydrogen atom is quantised. Show Answer Correct Answer: D) The energy of an electron an a hydrogen atom is quantised. 12. The isotopes of a same element have: A) Same mass number. B) Same atomic number. C) Different mass number. D) Both b & c. Show Answer Correct Answer: D) Both b & c. 13. This subatomic particle has a negative charge. A) Proton. B) Neutron. C) Electron. D) None of the above. Show Answer Correct Answer: C) Electron. 14. A tiny but very dense, positively charged portion of the atom that holds most of the atomic mass A) Electron Shells. B) Nucleus. C) Orbitals. D) Electron Cloud. Show Answer Correct Answer: B) Nucleus. 15. What does Bohr's model fail to explain? A) Multi-electron atoms. B) Electron cloud. C) Only hydrogen atom. D) Spectra of hydrogen. Show Answer Correct Answer: A) Multi-electron atoms. 16. The atomic number tells you what? A) Number of electrons. B) Number of protons. C) Number of neutrons. D) Both electrons and protons in an atom. Show Answer Correct Answer: B) Number of protons. 17. How did Rutherford discover the proton? A) Gold Foil Experiment. B) Planetary Model. C) Plum Pudding Model. D) Cathode tube ray experiment. Show Answer Correct Answer: A) Gold Foil Experiment. 18. The ..... contains the protons and neutrons of an atom, and is most of the mass of an atom A) Nucleus. B) Atomic Number. C) Atomic Mass. D) Electrons. Show Answer Correct Answer: A) Nucleus. 19. What has no charge (neutral), mass of 1 amu, and located in the nucleus? A) Valence electron. B) Electron. C) Neutron. D) Proton. Show Answer Correct Answer: C) Neutron. 20. What is the mass of a neutron? A) 0 amu. B) 1 amu. C) 1.5 amu. D) 2 amu. Show Answer Correct Answer: B) 1 amu. 21. What shell represents the lowest energy level of an atom? A) The 4th shell. B) The 1st shell. C) The 2nd shell. D) The 3rd shell. Show Answer Correct Answer: B) The 1st shell. 22. The X-ray was invented by A) William Crookes. B) Julius Plucker. C) Eugen Goldstein. D) Wilhelm Roentgen. Show Answer Correct Answer: D) Wilhelm Roentgen. 23. All of the mass of the atom is found in the ..... A) Electrons. B) Nucleus. C) Protons. D) Electron Clouds. Show Answer Correct Answer: B) Nucleus. 24. The number of valence electrons in a graphite atom is: A) 2. B) 4. C) 3. D) 5. Show Answer Correct Answer: B) 4. 25. What is the charge and location of an electron? A) Electrons have a positive charge and are in the electron cloud. B) Electrons have a negative charge and are in the nucleus. C) Electrons have a positive charge and are in the electron cloud. D) Electrons have a negative charge and are in the electron cloud. Show Answer Correct Answer: D) Electrons have a negative charge and are in the electron cloud. 26. Elements after actinium is called A) P-block elements. B) D-block elements. C) Actinides. D) Lanthanides. Show Answer Correct Answer: C) Actinides. 27. He claimed that matter was made of small, hard particles that he called "atomos." A) Moseley. B) Democritis. C) Einstein. D) Dalton. Show Answer Correct Answer: B) Democritis. 28. The atomic number of an element X is 8 and that of element Y is 4. Both these elements can exhibit a valency of: A) 4. B) 2. C) 3. D) 1. Show Answer Correct Answer: B) 2. 29. Which of the following people said the atom was a solid sphere? A) Rutherford. B) Thompson. C) Bohr. D) Dalton. Show Answer Correct Answer: D) Dalton. 30. A gas absorbs a photon of 355nm and emits at two wavelengths. If one of the emission is at 680nm, the other is at A) 1035nm. B) 325nm. C) 743nm. D) 518nm. Show Answer Correct Answer: C) 743nm. 31. In the ground state of the atoms, the orbital's are filled with electronsin the ..... order of energies A) Decreasing. B) Increasing. C) Same. D) Parallel. Show Answer Correct Answer: B) Increasing. 32. A sub-atomic particle with a negative charge A) Neutron. B) Electron. C) Nucleus. D) Proton. Show Answer Correct Answer: B) Electron. 33. The isotope deuterium of hydrogen has A) I. No neutrons and one proton. B) II. One neutrons and two protons. C) III. One electron and two neutron. D) IV. One proton and one neutron. Show Answer Correct Answer: D) IV. One proton and one neutron. 34. The electron first fills singlybefore pairing in any orbital's is applicable when orbital are having ..... energy A) More. B) Less. C) No. D) Equal. Show Answer Correct Answer: D) Equal. 35. Indicate the number of unpaired electrons in the Cl atom. A) 1. B) 3. C) 5. D) 0. Show Answer Correct Answer: D) 0. 36. The total number of protons and neutrons in an atom is called the ..... A) Atomic number. B) Weight number. C) Mass number. D) Proton number. Show Answer Correct Answer: C) Mass number. 37. The ion of an element has 2 positive charges. The mass number of atom of this element is 26 and the number of neutrons is 13. What is the number of electrons in the ion? A) 13. B) 10. C) 12. D) 11. Show Answer Correct Answer: D) 11. 38. Compared to the charge and mass of a proton, an electron has A) The same charge and a smaller mass. B) The same charge and the same mass. C) Opposite charge and smaller mass. D) Opposite charge and the same mass. Show Answer Correct Answer: C) Opposite charge and smaller mass. 39. Who proposed that the atom consists mostly of empty space? A) Bohr. B) Dalton. C) Chadwick. D) Rutherford. Show Answer Correct Answer: D) Rutherford. 40. What is the maximum number of electrons that contain the valuesn=4 l=3 A) 3. B) 7. C) 14. D) 12. Show Answer Correct Answer: C) 14. 41. Tin, Sn, is a soft white metal. It has a low melting point compared with other metals. Tin is widely used as a coating for cans of food. Which statement accurately describes atoms of tin? A) Tin atoms have 119 neutrons. B) Tin atoms have 68 electrons. C) Tin atoms have 50 protons. D) Tin atoms have five valence electrons. Show Answer Correct Answer: C) Tin atoms have 50 protons. 42. Millikan's oil drop experiment could find: A) Mass of electron. B) Charge of electron. C) Charge-to-mass ratio of proton. D) Charge-to-mass ratio of electron. Show Answer Correct Answer: B) Charge of electron. 43. Of all the isotopes of a an element have a mass of 75.23 amu, 48.7% have a mass of 74.61 amu, and 27.2% have a mass of 75.20 amu.What is the average mass of this element? A) 74.51 amu. B) 74.92 amu. C) 75.01 amu. D) 24.97 amu. Show Answer Correct Answer: B) 74.92 amu. 44. It is also known as the core of an atom A) Nucleus. B) Orbit. C) Radical. D) None of the above. Show Answer Correct Answer: A) Nucleus. 45. Valency of Cl is? A) 3. B) 2. C) 4. D) 1. Show Answer Correct Answer: D) 1. 46. If a particle undergoes accelrated motion, then it must radiate energy thereby electrons should loose energy and fall inside.This is a drawback of: A) Your model. B) Roopak sir model. C) Rutherford model. D) Bohr model. Show Answer Correct Answer: C) Rutherford model. 47. Which orbital will be filled first:4s or 3d? A) 5p. B) 4s. C) 3d. D) 4p. Show Answer Correct Answer: B) 4s. 48. In Rutherford's Gold Foil experiment, what particle was aimed at the gold foil? A) Alpha particles. B) Beta particles. C) Photons. D) Marbles. Show Answer Correct Answer: A) Alpha particles. 49. Which of the following cannot be broken down into something simpler? A) A compound. B) An element. C) A mixture. D) None of the above. Show Answer Correct Answer: B) An element. 50. An atom with atomic number 6 would have how many protons A) 12. B) 6. C) Cannot be determined. D) 3. Show Answer Correct Answer: B) 6. 51. A certain atom has 11 electrons, 8 neutrons, and a charge of-1. What is its atomic mass? A) 18. B) 11. C) 19. D) 15. Show Answer Correct Answer: A) 18. 52. Am element has 27 protons, 27 electrons, and 32 neutrons. Calculate the atomic mass of this element. A) 86. B) 59. C) 32. D) 54. Show Answer Correct Answer: B) 59. 53. The negatively charged particle is A) Proton. B) Neutron. C) Electron. D) None of the above. Show Answer Correct Answer: C) Electron. 54. An atom is most stable when it has how many valence electrons? A) 2. B) 6. C) 8. D) 4. Show Answer Correct Answer: C) 8. 55. What is the difference between the number of electrons in an atom of Tin (Sn) which has an atomic number of 50, and the number of electrons in an atom of Chlorine (Cl) which has an atomic number of 17. A) There is no difference. B) 47. C) 33. D) There is not enough information to answer this question. Show Answer Correct Answer: C) 33. 56. Which statement correctly describes the location and charge of the electrons in an atom? A) Electrons are located inside the nucleus and have no charge. B) Electrons are located outside the nucleus and have no charge. C) Electrons are located inside the nucleus and have a negative charge. D) Electrons are located outside the nucleus and have a negative charge. Show Answer Correct Answer: D) Electrons are located outside the nucleus and have a negative charge. 57. Which particle has a similar mass to a proton? A) Electron. B) Photon. C) Neutron. D) Marble. Show Answer Correct Answer: C) Neutron. 58. Symbol of proton A) P. B) P. C) All the above. D) None of the above. Show Answer Correct Answer: A) P. 59. Where does the atom have its most weight/mass? A) In the electron cloud. B) In the nucleus with electrons and protons. C) In the nucleus with protons and neutrons. D) It doesn't have mass. Show Answer Correct Answer: C) In the nucleus with protons and neutrons. 60. A wave with a large wavelength will have a ..... frequency and ..... energy A) High, low. B) Low, high. C) Low, low. D) High, high. Show Answer Correct Answer: C) Low, low. ← 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 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books