This quiz works best with JavaScript enabled. Home > Class 9 > Class 9 Science Chapter 4 Structure Of The Atom – Quiz 14 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 9 Science Chapter 4 Structure Of The Atom Quiz 14 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Argon and Calcium are A) Isotopes. B) Isobars. C) Isotones. D) None of the above. Show Answer Correct Answer: B) Isobars. 2. A type of equation that shows the atomic number and mass number of the particles involved A) Nuclear equation. B) Nuclear reaction. C) Atomic number. D) Atomic mass unit. Show Answer Correct Answer: A) Nuclear equation. 3. 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. 4. Electrons are A) Negative. B) Positive. C) Neutral. D) None of the above. Show Answer Correct Answer: A) Negative. 5. 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. 6. How many electrons can the d sublevel hold? A) 8. B) 10. C) 2. D) 4. Show Answer Correct Answer: B) 10. 7. A state of matter that has a definite volume and shape. A) Solid. B) Liquid. C) Gas. D) Matter. Show Answer Correct Answer: A) Solid. 8. The valence shell of a Calcium ion has A) 8 electrons. B) 2 electrons. C) No electrons. D) 3 electrons. Show Answer Correct Answer: A) 8 electrons. 9. 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. 10. What is the maximum number of electrons in the M-shell of an atom? A) 6. B) 8. C) 18. D) 32. Show Answer Correct Answer: C) 18. 11. Rutherford's 'alpha ($\alpha$) particles scattering experiment' resulted into discovery of A) Electron. B) Proton. C) Nucleus in the atom. D) Atomic mass. Show Answer Correct Answer: C) Nucleus in the atom. 12. 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. 13. 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. 14. The three subatomic particles are A) Proton, neutron, electron. B) Proton, nucleus, electron. C) Protein, neutron, electricity. D) Proton, neutral, electives. Show Answer Correct Answer: A) Proton, neutron, electron. 15. 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. 16. What is the charge of a neutral atom? A) Positive. B) Zero. C) It varies. D) Negative. Show Answer Correct Answer: B) Zero. 17. 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. 18. A reaction that involves a change in the nucleus of an atom A) Nuclear reaction. B) Nuclear equation. C) Radioactive decay. D) Radioactivity. Show Answer Correct Answer: A) Nuclear reaction. 19. No of Protons present in Sodium ( Na ) A) 11. B) 18. C) 10. D) None of the above. Show Answer Correct Answer: A) 11. 20. Mass of proton is ..... times more than that of electron A) 1000. B) 1500. C) 2500. D) 2000. Show Answer Correct Answer: D) 2000. 21. This particle determines which element it is. A) Protons. B) Neutrons. C) Electrons. D) Mrs. Wagner. Show Answer Correct Answer: A) Protons. 22. 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. 23. 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. 24. Neutrons have no ..... A) Mass. B) Charge. C) All the above. D) None of the above. Show Answer Correct Answer: B) Charge. 25. What is the Alpha particles A) Doubly charged helium ions. B) Doubly charged hydrogen ions. C) Doubly charged hydrogen atoms. D) Doubly charged helium atoms. Show Answer Correct Answer: A) Doubly charged helium ions. ← 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