This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom – Quiz 46 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 46 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The electron configuration of an atom is 1s$^{2}$2s$^{2}$2p$^{6}$. The number of valence electrons in the atom is A) 3. B) 6. C) 8. D) 10. Show Answer Correct Answer: C) 8. 2. Protons, Neutrons & Electrons are examples of A) Subatomic particles. B) Valence electrons. C) Elements. D) None of the above. Show Answer Correct Answer: A) Subatomic particles. 3. Calculate total number of lines in emission spectrum if electron jumps from n=5 A) 15. B) 10. C) 4. D) Infinite. Show Answer Correct Answer: B) 10. 4. Four elements W, X, Y and Z contain 8, 11, 9 and 17 protons per atom respectively. The element whichcannot form an anion is most likely to be: A) W. B) X. C) Y. D) Z. Show Answer Correct Answer: B) X. 5. The number of outermost electrons in the outermost shell are called A) Valency. B) Valence electron. C) Nhi pta bhayi. D) Shayad a and b. Show Answer Correct Answer: B) Valence electron. 6. Who discovered the presence of new radiation in gas discharge and called them canal rage? A) J.J Thomson. B) E. Gold-stein. C) All the above. D) None of the above. Show Answer Correct Answer: B) E. Gold-stein. 7. Na atom is A) Positively charged. B) Negatively charged. C) Neutral. D) None of the above. Show Answer Correct Answer: C) Neutral. 8. Bohr model's key success lay in what? A) Explaining the rydberg formula. B) Cubic model. C) Plum pudding model. D) None of the above. Show Answer Correct Answer: A) Explaining the rydberg formula. 9. The atomic number of an element having the maximum number of unpaired electrons in p-subshell is A) 7. B) 10. C) 12. D) 16. Show Answer Correct Answer: A) 7. 10. What is mass number? A) Number of protons. B) Number of electrons. C) Number of protons and electrons. D) Number of protons and neutrons. Show Answer Correct Answer: D) Number of protons and neutrons. 11. Which particle tells you the identity of the element? A) Neutrons. B) Electrons. C) Protons. D) Nucleus. Show Answer Correct Answer: C) Protons. 12. If X is the symbol for an element, which of the following two symbols represent isotopes of the same element? I. $^{77}$$_{35}$X II. $^{77}$$_{33}$X III. $^{81}$$_{37}$X IV. $^{81}$$_{35}$$^{ }$X A) I and II. B) III and IV. C) I and IV. D) I and III. Show Answer Correct Answer: C) I and IV. 13. The correct electronic configuration of potassium is ..... ? A) 2, 8, 4. B) 2, 8, 8, 6. C) 2, 8, 8, 18. D) 2, 8, 8, 1. Show Answer Correct Answer: D) 2, 8, 8, 1. 14. What is The branch of science that takes intoaccount this dual behaviour of matter called? A) Spectrometry. B) Quantum mechanics. C) Chemistry. D) Classical mechanics. Show Answer Correct Answer: B) Quantum mechanics. 15. He unknowingly discovered the electron as a result of cathode ray tube experiments. A) Thomson. B) Chadwick. C) Democritus. D) Aristotle. Show Answer Correct Answer: A) Thomson. 16. How many Valance electrons does Iodine Have? A) 6. B) 16. C) 7. D) 17. Show Answer Correct Answer: C) 7. 17. MASS NUMBER = A) ATOMIC NUMBER + ATOMIC NUMBER. B) ATOMIC NUMBER + NO OF NEUTRONS. C) ATOMIC NUMBER + NO OF PROTONS. D) NONE. Show Answer Correct Answer: B) ATOMIC NUMBER + NO OF NEUTRONS. 18. 6-The number of orbitals in the fourth energy level is A) 32. B) 4. C) 16. D) 9. Show Answer Correct Answer: C) 16. 19. What did Ernest Rutherford's experiment prove wrong? A) The orbital model. B) The plum pudding model. C) The solid sphere model. D) The atomic theory. Show Answer Correct Answer: B) The plum pudding model. 20. In any Bohr orbit of the hydrogen atom, the ratio of kinetic energy to potential energy of the electron as A) 1/2. B) 2. C) -1/2. D) -2. Show Answer Correct Answer: C) -1/2. 21. What is in the center of an atom? A) Way. B) Structure. C) Cell. D) Nucleus. Show Answer Correct Answer: D) Nucleus. 22. Electronic configuration of cu(29) is A) 3d10 4s1. B) 3d9 4s2. C) 3d8 4s2. D) 3d11 4s2. Show Answer Correct Answer: A) 3d10 4s1. 23. What is the small central core of an atom called? A) Nucleus. B) Orbital. C) Core. D) Electron. Show Answer Correct Answer: A) Nucleus. 24. Identify the sub-shell with highest energy. A) 5s. B) 4d. C) 5p. D) 4f. Show Answer Correct Answer: D) 4f. 25. $_{64}$Gd has the configuration A) [Xe]4f$^{8 }$6s$^{2}$. B) [Xe]4f$^{10}$. C) [Xe]4f$^{5}$ 5d$^{3}$ 6s$^{2}$. D) [Xe]4f$^{7}$ 5d$^{1}$ 6s$^{2}$. Show Answer Correct Answer: D) [Xe]4f$^{7}$ 5d$^{1}$ 6s$^{2}$. ← PreviousNext →Related 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 8Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 9Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books