This quiz works best with JavaScript enabled. Home > Class 9 > Class 9 Science Chapter 4 Structure Of The Atom – Quiz 13 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 9 Science Chapter 4 Structure Of The Atom Quiz 13 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Ions are: A) Atoms with a positive or negative charge. B) Atoms with no charge. C) Atoms with ONLY a positive charge. D) Atoms with ONLY a negative charge. Show Answer Correct Answer: A) Atoms with a positive or negative charge. 2. Which isotope of hydrogen does not possess neutron? A) Protium. B) Deuterium. C) Tritium. D) None of the above. Show Answer Correct Answer: A) Protium. 3. How many electrons are in a neutral atom of magnesium? A) 10. B) 12. C) 24. D) 24.3. Show Answer Correct Answer: B) 12. 4. The area around the nucleus of an atom where the atom's electrons are most likely to be found is called A) Electron cloud. B) Quark. C) Electron. D) Nucleus. Show Answer Correct Answer: A) Electron cloud. 5. Atom X has a proton number of 5 and a nucleon number of 11. How many protons, electrons and neutrons are present in atom X? A) Protons:5Electrons:5Neutrons:11. B) Protons:5Electrons:5Neutrons:6. C) Protons:5Electrons:6Neutrons:6. D) Protons:6Electrons:6Neutrons:5. Show Answer Correct Answer: B) Protons:5Electrons:5Neutrons:6. 6. Which of the following statement is always correct? A) An atom has equal no.of protons and electrons. B) An atom has equal no.of electrons and neutrons. C) An atom has equal no.of protons and neutrons. D) None of the above. Show Answer Correct Answer: A) An atom has equal no.of protons and electrons. 7. What is the primary factor that determines the chemical element of an atom? A) Number of electrons. B) Number of neutrons. C) Number of protons. D) Atomic mass. Show Answer Correct Answer: C) Number of protons. 8. The type of an atom is identified by its ..... A) Mass number. B) Atomic number. C) Number of nucleons. D) Number of positrons. Show Answer Correct Answer: B) Atomic number. 9. The number of electron shells an atom has is determined by its ..... A) Period. B) Main Group. C) Atomic Number. D) None of the above. Show Answer Correct Answer: A) Period. 10. Which statement best describes an electron? A) Smaller mass than a proton and a negative charge. B) Smaller mass than a proton and a positive charge. C) Greater mass than a proton and a negative charge. D) Greater mass than a proton and a positive charge. Show Answer Correct Answer: A) Smaller mass than a proton and a negative charge. 11. What noble gas should be used to write the shorthand configuration for Te? A) Ar. B) Kr. C) Car. D) Sb. Show Answer Correct Answer: B) Kr. 12. 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. 13. 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) 2. B) 4. C) 5. D) 8. Show Answer Correct Answer: D) 8. 14. 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. 15. Tick the correct matching A) (i) Protons-Rutherford (ii) Electrons-Thomson (iii) Neutrons-Chadwick. B) (i) Protons-Thomson (ii) Electrons-Rutherford (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: A) (i) Protons-Rutherford (ii) Electrons-Thomson (iii) Neutrons-Chadwick. 16. 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. 17. Which of the following particles has a mass that is almost the same as the mass of a proton? A) Neutron. B) Electron. C) Positron. D) Beta particle. Show Answer Correct Answer: A) Neutron. 18. 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. 19. 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. 20. What is the atomic number of Neon A) 89. B) 73. C) 10. D) 12. Show Answer Correct Answer: C) 10. 21. An element X has electronic configuration 2, 8, 2. Its valency is: A) 5. B) 3. C) 1. D) 2. Show Answer Correct Answer: D) 2. 22. An element with a mass number of 10 and an atomic number of 6 has how many protons? A) 5. B) 8. C) 6. D) 10. Show Answer Correct Answer: C) 6. 23. The atomic number of Sulphur (S) is 16. Identify the number of electrons in each shell of Sulphur. A) 2, 8, 6. B) 2, 8, 8. C) 2, 2, 8, 4. D) 2, 4, 8, 2. Show Answer Correct Answer: A) 2, 8, 6. 24. Which particles are not inside the nucleus? A) Electrons. B) Neutrons. C) Protons. D) None of the above. Show Answer Correct Answer: A) Electrons. 25. Atoms X forms a positive ion. Which of the following is atom X? A) Bromine. B) Chlorine. C) Hydrogen. D) Oxygen. Show Answer Correct Answer: C) Hydrogen. ← 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 6Class 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 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books