This quiz works best with JavaScript enabled. Home > Class 9 > 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 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The max no of electron in the outermost orbit is ..... A) 7. B) 44. C) 56. D) 8. Show Answer Correct Answer: D) 8. 2. The mass of a proton/neutron is ..... A) 1 a.m.u. B) 1 m/s. C) 1/1836 a.m.u. D) None of the above. Show Answer Correct Answer: A) 1 a.m.u. 3. The ..... are found in shells. A) Protons. B) Neutrons. C) Electrons. D) +1. E) -1. Show Answer Correct Answer: C) Electrons. 4. When an atom contains more neutrons than another atom, it is A) A neutral atom with no charge. B) An ion and negatively charged. C) An ion and positively charged. D) An isotope and has more mass. Show Answer Correct Answer: D) An isotope and has more mass. 5. Which subatomic particle is responsible for the chemical properties of an element? A) Proton. B) Neutron. C) Electron. D) Nucleus. Show Answer Correct Answer: C) Electron. 6. The alpha particles used by Rutherford in his Gold Foil experiment are: A) Protons. B) Helium atoms. C) Helium ions. D) Neutrons. Show Answer Correct Answer: C) Helium ions. 7. Which of the following subatomic particle determines the identity of an element? A) Neutron. B) Proton. C) Electron. D) None of the above. Show Answer Correct Answer: B) Proton. 8. Which subatomic particle is found in the nucleus and has no charge? A) Proton. B) Electron. C) Neutron. D) Photon. Show Answer Correct Answer: C) Neutron. 9. Mass of proton is A) 1. B) Zero. C) Negligible. D) 2. Show Answer Correct Answer: A) 1. 10. Which of the following statements is true about the 3s and the 4s sublevels? A) These sublevels have the same energy. B) These sublevels are the same distance from the nucleus. C) These sublevels hold different amounts of electrons. D) These sublevels have the same shape. Show Answer Correct Answer: D) These sublevels have the same shape. 11. Protium is the isotope of A) Oxygen. B) Hydrogen. C) Chlorine. D) Iodine. Show Answer Correct Answer: B) Hydrogen. 12. Electrons can be found A) Inside protons. B) Inside neutrons. C) Attached to the nucleus. D) Moving rapidly outside the nucleus. Show Answer Correct Answer: D) Moving rapidly outside the nucleus. 13. Which of the following scientists discovered the electron? A) J. J. Thomson. B) Ernest Rutherford. C) Niels Bohr. D) James Chadwick. Show Answer Correct Answer: A) J. J. Thomson. 14. The valency of noble gases is A) 1. B) 0. C) 2. D) None of the above. Show Answer Correct Answer: B) 0. 15. What part of the water cycle can carry pollutants from your yard to streams and rivers? A) Evaporation. B) Runoff. C) Precipitation. D) Condensation. Show Answer Correct Answer: B) Runoff. 16. A certain atom has 26 protons, 26 electrons, and 30 neutrons. What is its mass number? A) 26. B) 30. C) 52. D) 56. Show Answer Correct Answer: D) 56. 17. A scientists analyzed an unknown sample and determined that it contained 5 moles of oxygen and 2 moles of nitrogen? Which of the following would be its molecular formula? A) N2O5. B) 4 fish. C) NO. D) Brush. Show Answer Correct Answer: A) N2O5. 18. The law of ..... states that mass is neither created nor destroyed during chemical reactions or physical changes. A) Multiple proportions. B) Definite proportions. C) Universal gravitation. D) Conservation of mass. Show Answer Correct Answer: D) Conservation of mass. 19. Sub-Atomic Particles are A) Particles that atoms are made of. B) Particles that solutions are made of. C) Particles that metals are made of. D) None of the above. Show Answer Correct Answer: A) Particles that atoms are made of. 20. How are electrons arranged in an atom? A) In groups of five. B) In energy levels. C) By color. D) By shape. Show Answer Correct Answer: B) In energy levels. 21. The atomic number of an atom is A) The number of electrons in the nucleus. B) The number of protons in the electron cloud. C) The number of protons in its nucleus. D) The number of neutrons in the electron cloud. Show Answer Correct Answer: C) The number of protons in its nucleus. 22. The electron configuration of an atom is 1s$^{2}$2s$^{2}$2p$^{6}$. The number of electrons in the atom is A) 3. B) 6. C) 8. D) 10. Show Answer Correct Answer: D) 10. 23. What is the electronic configuration of helium? A) 1, 2. B) 2. C) 2, 1, 5. D) 2, 8, 8. Show Answer Correct Answer: B) 2. 24. Which of the following is the use of phosphorus-32 isotope? Antara following, which is the use of isotopes phosphorus-32? A) Kills microorganisms in food stuffs kill microorganisms in food. B) X-ray for Body Examination-Xamination for Body Inspection. C) Studying the metabolism of planting plant metabolism. D) Dating for the age of fossils and artifacts pentarikhan fossil age and artifact. Show Answer Correct Answer: C) Studying the metabolism of planting plant metabolism. 25. Carbon-12 and Carbon-14 are both isotopes of Carbon. What do the 12 and 14 mean? A) The total number of protons in the nucleus. B) The total number of neutrons in the nucleus. C) The total number of nucleons in the nucleus. D) The total number of electrons around the nucleus. Show Answer Correct Answer: C) The total number of nucleons in the nucleus. ← PreviousNext →Related 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 5Class 9 Science Chapter 4 Structure Of The Atom Quiz 7Class 9 Science Chapter 4 Structure Of The Atom Quiz 8Class 9 Science Chapter 4 Structure Of The Atom Quiz 9Class 9 Science Chapter 4 Structure Of The Atom Quiz 10Class 9 Science Chapter 4 Structure Of The Atom Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books