This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom – Quiz 28 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 28 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The region at the center of an atom's ..... A) Nucleus. B) Ion. C) Isotopes. D) None of the above. Show Answer Correct Answer: A) Nucleus. 2. Identify an element with tendency to lose electrons, having three shells and valency 1. A) Potassium. B) Sodium. C) Lithium. D) Chlorine. Show Answer Correct Answer: B) Sodium. 3. Who suggested the planetary model of atom? A) Ernest Rutherford. B) Michael Faraday. C) JJ Thomson. D) James Chadwick. Show Answer Correct Answer: A) Ernest Rutherford. 4. Ne is the symbol for the element ..... A) Nickel. B) Nitrogen$^{}$. C) Neon. D) Sodium. Show Answer Correct Answer: C) Neon. 5. An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number? A) 20. B) 10. C) 5. D) 25. Show Answer Correct Answer: D) 25. 6. The symbol for the element HELIUM is ..... A) Hm. B) Hl. C) H. D) He. Show Answer Correct Answer: D) He. 7. The nodal plane of p$_{y}$ orbital is A) No nodal plane. B) Xy plane. C) Yz plane. D) Zx plane. Show Answer Correct Answer: D) Zx plane. 8. Ag ..... 110 and Ag ..... 112 are two forms of silver with different mass # so they are A) Compounds. B) Isotopes. C) Orbitals. D) Neutrons. Show Answer Correct Answer: B) Isotopes. 9. What is the atomic number for an element with three protons? A) 2. B) 1. C) 3. D) 6. Show Answer Correct Answer: C) 3. 10. In Argon atom how many total electrons can have s=+1/2 A) 10. B) 5. C) 9. D) 18. Show Answer Correct Answer: C) 9. 11. This subatomic particle contributes to the mass but not the charge of an atom. A) Proton. B) Neutron. C) Electron. D) None of the above. Show Answer Correct Answer: B) Neutron. 12. If we start off with element $_{24}$X$^{50}$ after an alpha decay we get another element Y that looks like A) $_{22}$Y$^{50}$. B) $_{22}$Y$^{46}$. C) $_{20}$Y$^{48}$. D) $_{26}$Y$^{54}$. Show Answer Correct Answer: B) $_{22}$Y$^{46}$. 13. What is the basic unit (or smallest piece) of a chemical element? A) Proton. B) Neutron. C) Electron. D) Atom. Show Answer Correct Answer: D) Atom. 14. How many orbitals contain the value n=5 l=1? A) 4. B) 6. C) 53. D) 3. Show Answer Correct Answer: D) 3. 15. The relative mass of an electron is ..... A) 1. B) 2. C) 0. D) 3. Show Answer Correct Answer: C) 0. 16. What are Isobars? A) Atoms with Different mass number, but same Atomic numbers. B) Atoms with different atomic numbers, but same mass number. C) Neutrons of an Element. D) Protons of an Element. Show Answer Correct Answer: B) Atoms with different atomic numbers, but same mass number. 17. The mass of proton was ..... times electron A) 1200. B) 20000. C) 2000. D) 20. Show Answer Correct Answer: C) 2000. 18. In photoelectric effect, the kinetic energy of the photoelectrons increases linearly with the A) Wavelength of incident light. B) Frequency of incident light. C) Velocity of incident light. D) Atomic mass of the element. Show Answer Correct Answer: B) Frequency of incident light. 19. A line spectrum is produced when an electron moves from one energy level A) Into the nucleus. B) To another position in the same sublevel. C) To a higher energy level. D) To a lower energy level. Show Answer Correct Answer: D) To a lower energy level. 20. X atom has 12 protons. what is the electron arrangement of atom X? A) 2.8. B) 2.8.8. C) 2.8.2. D) 2.10. Show Answer Correct Answer: C) 2.8.2. 21. Atoms that have a net charge: A) Isotope. B) Elements. C) Ions. D) All atoms have a net charge. Show Answer Correct Answer: C) Ions. 22. Which of the following sets of quantum numbers are valid A) N = 1, l = 2, m = 0, s =-1/2. B) N = 2, l = 2, m =-2, s =-1/2. C) N = 2, l = 2, m = 0, s = 0. D) N = 2, l = 2, m = 0, s =-1/2. Show Answer Correct Answer: D) N = 2, l = 2, m = 0, s =-1/2. 23. The fundamental particles in an atom which is present inside the nucleus A) Proton and electron. B) Proton and neutron. C) Proton only. D) Neutron only. Show Answer Correct Answer: B) Proton and neutron. 24. Calculate the energy associated with the first orbit of He$^{+}$. what is the radius of this orbit? A) -2.18X10$^{-18}$J, 0.0529nm. B) -8.72X10$^{-18}$J, 0.0529nm. C) -2.18X10$^{-18}$J, 0.02645nm. D) -8.72X10$^{-18}$J, 0.02645nm. Show Answer Correct Answer: D) -8.72X10$^{-18}$J, 0.02645nm. 25. Which of the subatomic particles is the heaviest? A) Electrons. B) Protons. C) Neutrons. D) Protons and neutrons have equal mass. Show Answer Correct Answer: D) Protons and neutrons have equal mass. ← 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