This quiz works best with JavaScript enabled. Home > Cbse > Class 9 > Science > Structure Of The Atom > Class 9 Science Chapter 4 Structure Of The Atom – Quiz 6 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 9 Science Chapter 4 Structure Of The Atom Quiz 6 (52 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which subatomic particles are found in the electron cloud of an atom? [Select all that apply] A) Protons. B) Neutrons. C) Electrons. D) None of the above. Show Answer Correct Answer: C) Electrons. 2. An atom of element Y has 18 protons and 22 neutrons in its nucleus. What is the number of valence electrons in atom Y? A) 4. B) 8. C) 5. D) 2. Show Answer Correct Answer: B) 8. 3. When is an ion positively charged? A) It cannot be positively charged. B) If it has the same number of protons and electrons. C) If it has more protons than electrons. D) If it has more electrons than protons. Show Answer Correct Answer: C) If it has more protons than electrons. 4. Tick the correct matching A) (i) Protons-Thomson (ii) Electrons-Rutherford (iii) Neutrons-Chadwick. B) (i) Protons-Rutherford (ii) Electrons-Thomson (iii) Neutrons-Chadwick. C) (i) Protons-Chadwick (ii) Electrons-Rutherford (iii) Neutrons-Thomson. D) (i) Protons-Thomson (ii) Electrons-Chadwick (iii) Neutrons-Rutherford. Show Answer Correct Answer: B) (i) Protons-Rutherford (ii) Electrons-Thomson (iii) Neutrons-Chadwick. 5. Will Cl-35 and Cl-37 have different valencies?? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: B) No. 6. Which of the following particles has a mass that is almost the same as the mass of a proton? A) Neutron. B) Beta particle. C) Positron. D) Electron. Show Answer Correct Answer: A) Neutron. 7. The nucleus of the atom is considered to have ..... A) A Neutral charge. B) A negative charge. C) A positive charge. D) None of the above. Show Answer Correct Answer: C) A positive charge. 8. Which subatomic particle has a charge of +1? A) Proton. B) Neutron. C) Electron. D) None of the above. Show Answer Correct Answer: A) Proton. 9. What is the atomic number of Neon A) 12. B) 89. C) 73. D) 10. Show Answer Correct Answer: D) 10. 10. An element X has electronic configuration 2, 8, 2. Its valency is: A) 1. B) 5. C) 2. D) 3. Show Answer Correct Answer: C) 2. 11. An element with a mass number of 10 and an atomic number of 6 has how many protons? A) 8. B) 5. C) 6. D) 10. Show Answer Correct Answer: C) 6. 12. Atoms X forms a positive ion. Which of the following is atom X? A) Oxygen. B) Chlorine. C) Bromine. D) Hydrogen. Show Answer Correct Answer: D) Hydrogen. 13. Argon and Calcium are A) Isotopes. B) Isobars. C) Isotones. D) None of the above. Show Answer Correct Answer: B) Isobars. 14. A type of equation that shows the atomic number and mass number of the particles involved A) Nuclear equation. B) Atomic mass unit. C) Nuclear reaction. D) Atomic number. Show Answer Correct Answer: A) Nuclear equation. 15. What experiment proved a small dense positively charged nucleus, and who did it? A) Gold foil experiment, Rutherford. B) Gold foil experiment, Thomson. C) Cathode ray tube experiment, Thomson. D) Cathode ray tube experiment, Dalton. Show Answer Correct Answer: A) Gold foil experiment, Rutherford. 16. Radiation that is made up of beta particles; is deflected toward a positively charged plate when radiation from a radioactive source is directed between two electrically charged plates A) Beta radiation. B) Alpha radiation. C) Nuclear reaction. D) Radioactive decay. Show Answer Correct Answer: A) Beta radiation. 17. How many electrons can the d sublevel hold? A) 8. B) 10. C) 2. D) 4. Show Answer Correct Answer: B) 10. 18. A state of matter that has a definite volume and shape. A) Matter. B) Gas. C) Liquid. D) Solid. Show Answer Correct Answer: D) Solid. 19. The valence shell of a Calcium ion has A) 2 electrons. B) No electrons. C) 8 electrons. D) 3 electrons. Show Answer Correct Answer: C) 8 electrons. 20. True or False-Protons and Neutrons have about the same mass. A) True-They have about the same mass. B) False-They do not have about the same mass. C) All the above. D) None of the above. Show Answer Correct Answer: A) True-They have about the same mass. 21. What is the maximum number of electrons in the M-shell of an atom? A) 8. B) 18. C) 6. D) 32. Show Answer Correct Answer: B) 18. 22. Rutherford's 'alpha ($\alpha$) particles scattering experiment' resulted into discovery of A) Proton. B) Nucleus in the atom. C) Atomic mass. D) Electron. Show Answer Correct Answer: B) Nucleus in the atom. 23. How is mass computed? A) By subtracting the number of protons from the number of electrons. B) By adding the number of protons and the number of neutrons. C) By adding the number of protons and the number of electrons. D) By adding the number of neutrons and the number of electrons. Show Answer Correct Answer: B) By adding the number of protons and the number of neutrons. 24. An Outermost Shell, Which had Eight electrons was said to be A) Octet. B) Hopper. C) Hexa. D) None of the above. Show Answer Correct Answer: A) Octet. 25. The three subatomic particles are A) Protein, neutron, electricity. B) Proton, neutral, electives. C) Proton, nucleus, electron. D) Proton, neutron, electron. Show Answer Correct Answer: D) Proton, neutron, electron. 26. Which number shown on the periodic table is based on the average of all isotopes of an element? A) Atomic Number. B) Atomic Mass. C) Mass Number. D) None of the above. Show Answer Correct Answer: B) Atomic Mass. 27. What is the charge of a neutral atom? A) Positive. B) Negative. C) Zero. D) It varies. Show Answer Correct Answer: C) Zero. 28. What is an atomic number? A) The sum of protons and neutrons in an atom. B) The sum of protons and electrons in an atom. C) The number of protons in an atom of a specific element. D) The number of neutrons in a specific element. Show Answer Correct Answer: C) The number of protons in an atom of a specific element. 29. A reaction that involves a change in the nucleus of an atom A) Nuclear reaction. B) Radioactivity. C) Nuclear equation. D) Radioactive decay. Show Answer Correct Answer: A) Nuclear reaction. 30. No of Protons present in Sodium ( Na ) A) 11. B) 18. C) 10. D) None of the above. Show Answer Correct Answer: A) 11. 31. Mass of proton is ..... times more than that of electron A) 1000. B) 2500. C) 2000. D) 1500. Show Answer Correct Answer: C) 2000. 32. This particle determines which element it is. A) Protons. B) Neutrons. C) Mrs. Wagner. D) Electrons. Show Answer Correct Answer: A) Protons. 33. The number of valence electrons an atom has is determined by its ..... A) Period. B) Main Group. C) Atomic Number. D) None of the above. Show Answer Correct Answer: B) Main Group. 34. What is nucleiods? A) Total number of Protons and Neutrons. B) Total number of Electron and Neutron. C) Total number of Neutrons. D) Total number of Electron and Protons. Show Answer Correct Answer: A) Total number of Protons and Neutrons. 35. Neutrons have no ..... A) Mass. B) Charge. C) All the above. D) None of the above. Show Answer Correct Answer: B) Charge. 36. What is the Alpha particles A) Doubly charged hydrogen ions. B) Doubly charged hydrogen atoms. C) Doubly charged helium ions. D) Doubly charged helium atoms. Show Answer Correct Answer: C) Doubly charged helium ions. 37. Mass no.of an atom is 27 and the no.of neutrons is 14. What is the no.of electrons in that atom? A) 16. B) 14. C) 10. D) 13. Show Answer Correct Answer: D) 13. 38. Whose numerous writing was the atomic theory A) Chadwick. B) Bohr. C) Rutherford. D) Thomson. Show Answer Correct Answer: B) Bohr. 39. A pure form of matter that cannot be broken into other elements. A) Atomic Number. B) Mass Number. C) Element. D) None of the above. Show Answer Correct Answer: C) Element. 40. What is the maximum number of electrons that can occupy the second energy level of an atom? A) 2. B) 18. C) 32. D) 8. Show Answer Correct Answer: D) 8. 41. A neutral, subatomic particle in an atom's nucleus that has a mass nearly equal to that of a proton A) Electron. B) Nucleus. C) Neutron. D) Proton. Show Answer Correct Answer: C) Neutron. 42. ..... have a negligible mass. A) +1. B) Neutrons. C) Protons. D) Electrons. E) -1. Show Answer Correct Answer: D) Electrons. 43. While making his model of an atom, what structure did Rutherford discover (containing protons and neutrons)? A) The Electron Cloud. B) The quarks. C) The Nucleus. D) The atomic mass. Show Answer Correct Answer: C) The Nucleus. 44. A particle that moves around the nucleus is called an A) Proton. B) Electron. C) Neutron. D) None of the above. Show Answer Correct Answer: B) Electron. 45. Which of the following elements contains the least amount of electrons? A) Aluminum. B) Fluorine. C) Calcium. D) Nitrogen. Show Answer Correct Answer: D) Nitrogen. 46. The smallest particle of an element that still represents that element. A) Atom. B) Electron. C) Proton. D) Nucleus. Show Answer Correct Answer: A) Atom. 47. Which is the correct sequence of the scientists who made major changes in the model of the atom?1-JJ Thomson2-James Chadwick3-John Dalton4-Niels Bohr5-Ernest Rutherford A) 4, 3, 2, 1, 5. B) 5, 3, 2, 1, 4. C) 2, 1, 4, 3, 5. D) 3, 1, 5, 4, 2. Show Answer Correct Answer: D) 3, 1, 5, 4, 2. 48. If an atom has 10 electrons, how many protons does it have? A) 0. B) 10. C) 1. D) 5. Show Answer Correct Answer: B) 10. 49. The smallest particle of an element that retains all the properties of that element; is electrically neutral, spherically shaped and composed of electrons, protons, and neutrons A) Electron. B) Neutron. C) Nucleus. D) Atom. Show Answer Correct Answer: D) Atom. 50. Most of the atom is empty space. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 51. Which subatomic particle determines the identity of an element? A) Proton. B) Neutron. C) Photon. D) Electron. Show Answer Correct Answer: A) Proton. 52. Electrons have a ..... charge A) Positive. B) Negative. C) Neutral. D) None of the above. Show Answer Correct Answer: B) Negative. ← PreviousRelated QuizzesScience QuizzesClass 9 QuizzesClass 9 Science Chapter 4 Structure Of The Atom Quiz 1Class 9 Science Chapter 4 Structure Of The Atom Quiz 2Class 9 Science Chapter 4 Structure Of The Atom Quiz 3Class 9 Science Chapter 4 Structure Of The Atom Quiz 4Class 9 Science Chapter 4 Structure Of The Atom Quiz 5 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books