This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Chemistry Part I > Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom – Quiz 16 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Chemistry (Part I) Chapter 2 Structure Of Atom Quiz 16 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. How many dots would you put around carbon, a group 14 element? A) 6. B) 8. C) 4. D) 18. Show Answer Correct Answer: C) 4. 2. Electrons are ..... A) Negative and the smallest subatomic particles. B) Positive and the smallest subatomic particles. C) Neutral and the smallest subatomic particles. D) Negative and the largest subatomic particles. Show Answer Correct Answer: A) Negative and the smallest subatomic particles. 3. Which of the following species has 1 proton and 2 electrons only? A) $^{2}$H$^{+}$. B) $^{2}$H$^{-}$. C) $^{1}$H. D) $^{1}$H$^{-}$. Show Answer Correct Answer: D) $^{1}$H$^{-}$. 4. The atomic particle with a negative charge is the ..... A) Neutron. B) Electron. C) Proton. D) Nucleus. Show Answer Correct Answer: B) Electron. 5. An atom has 82 protons, 125 neutrons, and 82 electrons. What is the charge of the atom's cloud? A) +82. B) 0. C) -82. D) +125. Show Answer Correct Answer: C) -82. 6. Dalton's atomic theory successfully proved A) Rutherford correct there is a nucleus. B) Thomson correct regarding electrons with a negative charge. C) Rutherford correct regarding protons with a positive charge. D) Democritus correct regarding all matter made of atoms. Show Answer Correct Answer: D) Democritus correct regarding all matter made of atoms. 7. In the gold foil experiment, most of the positively charged alpha particles passed through the gold foil, but some were deflected or bounced back. What did we conclude because of this? A) Atoms are small indivisible spheres. B) Atoms are mostly empty space with a small, dense, positive center. C) Atoms have negatively charged particles which orbit the nucleus. D) Light is a wave, not a particle. Show Answer Correct Answer: B) Atoms are mostly empty space with a small, dense, positive center. 8. Which of the following consist of three subshells A) N shell. B) O shell. C) M shell. D) L shell. Show Answer Correct Answer: C) M shell. 9. A paramagnetic atom is A) An atom with All paired electrons. B) An atom with unpaired electrons. C) Both. D) None of the above. Show Answer Correct Answer: B) An atom with unpaired electrons. 10. Which has more energy A) 4d. B) 4f. C) 4s. D) 4p. Show Answer Correct Answer: B) 4f. 11. 3-In the modern periodic table, the number of period of the element is the same as A) Azimuthal quantum number. B) Atomic number. C) Principal quantum number. D) Atomic mass. Show Answer Correct Answer: C) Principal quantum number. 12. Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), and Cesium (Cs) are all in the same column (group) on the periodic table. Why are they all grouped together? A) They all end with the letters (ium). B) They share the same characteristics. C) They are in alphabetical order. D) That is where they just happen to be on the periodic table and are not grouped for any particular reason. Show Answer Correct Answer: B) They share the same characteristics. 13. WHICH OF THE FOLLOWING DECIDE THE CHEMICAL PROPERTIES OF ELEMENTS? A) NO OF PROTONS. B) NO OF ELECTRONS IN L SHELL. C) NO OF VALENCE ELECTRONS. D) NO OF NEUTRONS. Show Answer Correct Answer: C) NO OF VALENCE ELECTRONS. 14. The atomic number of Sodium is 11 and mass number is 23u. It consists of A) 11 protons and 12 neutrons. B) 12 protons and 11 neutrons. C) 12 protons and 11 electrons. D) 12 electrons and 11 neutrons. Show Answer Correct Answer: A) 11 protons and 12 neutrons. 15. The ionisation energy of H-atom (in the ground state) is x kJ. The energy required for an electronto jump from 2nd to 3rd orbit will be A) 5x / 36. B) 7.2x. C) X/6. D) 5x. Show Answer Correct Answer: A) 5x / 36. 16. A substance that does not conduct electricity and is not malleable A) Metal. B) Aluminum. C) Non-Metal. D) Gold. Show Answer Correct Answer: C) Non-Metal. 17. Idea was of an indivisible particle of matter he called "atomos" A) John Dalton. B) Aristotle. C) Plato. D) Democritus. Show Answer Correct Answer: D) Democritus. 18. Atomic number of an element is 19, its electronic configuration is A) 2, 8, 8, 1. B) 2, 9, 8. C) 2, 8, 9. D) 2, 8, 1. Show Answer Correct Answer: A) 2, 8, 8, 1. 19. What is the "magic number" of valence electrons for atoms to be stable? A) 2. B) 8. C) 18. D) 1. Show Answer Correct Answer: B) 8. 20. What is the maximum number of electrons in p subshell? A) 14. B) 10. C) 6. D) 8. Show Answer Correct Answer: D) 8. 21. F$^{3-}$ has an electron arrangement of 2.8.8. How many protons does F$^{3-}$ have? A) 15. B) 18. C) 10. D) 8. Show Answer Correct Answer: A) 15. 22. Discovered the electron A) Rutherford. B) Dalton. C) Bohr. D) Thomson. Show Answer Correct Answer: D) Thomson. 23. The following can be found on the Periodic Elements ..... A) The number of atoms in a carbon dioxide molecule. B) All the compounds that exist in the natural world. C) The chemical formula for water. D) All the elements that have been discovered or created in a lab. Show Answer Correct Answer: D) All the elements that have been discovered or created in a lab. 24. In Bohr model of the hydrogen atom, the lowest orbit corresponds to A) Zero energy. B) The maximum energy. C) Infinite energy. D) The minimum energy. Show Answer Correct Answer: D) The minimum energy. 25. The innermost orbital electron is A) L. B) M. C) N. D) K. Show Answer Correct Answer: D) K. 26. The correct electronic configuration of a chloride ion is: A) 2, 8, 7. B) 2, 8, 4. C) 2, 8, 8. D) 2, 8. Show Answer Correct Answer: C) 2, 8, 8. 27. What did J.J. Thomson's experiment show? A) The atom is like a uniform sphere. B) Cathode rays are made up of electrons. C) All atoms undergo radioactive decay. D) Isotopes undergo radioactive decay. Show Answer Correct Answer: A) The atom is like a uniform sphere. 28. The number of neutrons in $_{18}$Ar$^{40}$ is A) 40. B) 22. C) 18. D) 20. Show Answer Correct Answer: B) 22. 29. The mass number of two atoms X and Y is the same (40 each) but their atomic numbers are different (being20 and 18 respectively). X and Y are examples of: A) Chemically similar atoms. B) Isotopes. C) Solid and liquid metals. D) Isobars. Show Answer Correct Answer: D) Isobars. 30. Who developed the law of conservation of mass? A) Francis Aston. B) Michael Faraday. C) Antoine Lavoisier. D) Joseph Proust. Show Answer Correct Answer: C) Antoine Lavoisier. 31. If I have three atoms and they all have the same atomic number. Which is true? A) They must have the same number of protons. B) Then must have the same number of neutrons. C) They must be different elements. D) None of the above. Show Answer Correct Answer: A) They must have the same number of protons. 32. All orbitals of equal energy are occupied by one electron before any single orbital is occupied by a second electron. A) Hund's rule. B) Aufbau principle. C) Pauli exclusion principle. D) Core Notation. Show Answer Correct Answer: A) Hund's rule. 33. What is an alpha particle? A) It is a particle that has 2+ charge. B) It is a helium atom without a charge. C) It is a dominant particle in a subatomic world. D) It is a particle that has 2-charge. Show Answer Correct Answer: A) It is a particle that has 2+ charge. 34. James Chadwick is known for: A) The plum pudding model. B) Discovering that electrons move in energy levels. C) Discovering the neutron. D) Discovering that the atom is mostly empty space. Show Answer Correct Answer: C) Discovering the neutron. 35. Who did the Alpha-Scattering Experiment? A) Alfred Nobel. B) James Watson. C) John Dalton. D) Ernest Rutherford. Show Answer Correct Answer: D) Ernest Rutherford. 36. Two atoms of the same element can differ in which of the following? A) Only in the number of neutrons or electrons. B) Only in the number of protons or neutrons. C) All the above. D) None of the above. Show Answer Correct Answer: A) Only in the number of neutrons or electrons. 37. How many electrons will have the following quantum numbers. n = 3, m$_{s}$ =-1/2 A) 18. B) 6. C) 9. D) 3. Show Answer Correct Answer: C) 9. 38. A substance made up of only one kind of atom A) Elephant. B) Elementary. C) Element. D) Ellie. Show Answer Correct Answer: C) Element. 39. In an atom, electrons ..... A) Are found within the nucleus. B) Stay in a region called the electron cloud. C) Orbit the nucleus like planets around the Sun. D) None of the above. Show Answer Correct Answer: B) Stay in a region called the electron cloud. 40. The ionisation energy of 10 times ionised sodium atom is A) 13.6 x (11)2 eV. B) 13.6 /11 eV. C) 13.6 eV. D) 13.6x11 eV. Show Answer Correct Answer: A) 13.6 x (11)2 eV. 41. The number of atoms present in the molecules of an element is called A) Formula. B) Atomicity. C) Valency. D) None of the above. Show Answer Correct Answer: B) Atomicity. 42. "This result was almost as incredible as if you fire a 15-inch shell at a piece of tissue paper and it comes back and hits you."Identify the scientist who made the above statement A) Niels Bohr. B) Ernest Rutherford. C) John Dalton. D) J.J. Thomson. Show Answer Correct Answer: B) Ernest Rutherford. 43. Which quantum no. Predicts about the splitting of main lines of spectrum under magnetic field A) Azimuithal quantum no. B) Magnetic quantum no. C) Principal quantum no. D) Spin quantum no. Show Answer Correct Answer: B) Magnetic quantum no. 44. Ernest Rutherford discovered which part of the atom through the use of gold foil experiment? A) Positive nucleus. B) Electron cloud. C) Electron. D) Neutron. Show Answer Correct Answer: A) Positive nucleus. 45. Maximum number of electrons in each orbital is? A) 1. B) 4. C) 3. D) 2. Show Answer Correct Answer: D) 2. 46. How is the number of neutrons in the nucleus of an atom calculated? A) Add the number of e-and p+ together. B) Subtract the number of e-from p+. C) Subtract the number of p+ from the mass number. D) Add the mass number to the number of e-. Show Answer Correct Answer: C) Subtract the number of p+ from the mass number. 47. The presence of anode rays inside the discharge tube was shown by? A) J.J. Thomson. B) Chadwick. C) Newton. D) Goldstein. Show Answer Correct Answer: D) Goldstein. 48. Calculation used to find the number of neutrons in an atom A) Atomic Mass-Atomic Number. B) Atomic Number-Atomic Mass. C) Atomic Mass-Electrons. D) None of these. Show Answer Correct Answer: A) Atomic Mass-Atomic Number. 49. X was born in Copenhagen on 7 October, 1885. He got the Nobel Prize for his work on the structure of Atom in 1922? Who is X A) John Dalton. B) JJ Thomson. C) Ernest Rutherford. D) Neils Bohr. Show Answer Correct Answer: D) Neils Bohr. 50. The electronic configuration of chlorine is A) 2, 7. B) 2, 7, 8. C) 2, 8, 7. D) 2, 8, 8, 7. Show Answer Correct Answer: C) 2, 8, 7. 51. The region at the center of an atom that contains most of the atom's mass A) Nucleus. B) Ion. C) Electron cloud. D) Isotope. Show Answer Correct Answer: A) Nucleus. 52. Element X has 6p and 6n, whereas Element Y has 6p and 8n. The relation between both of them is? A) Isobars. B) Isotopes. C) Noble elements. D) None of the above. Show Answer Correct Answer: B) Isotopes. 53. No of unpaired e in Fe+3 A) 4. B) 0. C) 5. D) 3. Show Answer Correct Answer: C) 5. 54. Particles found within the atom, mainly protons, neutrons, and electrons. A) Subatomic Particles. B) Nucleus. C) Submarine Particles. D) Element. Show Answer Correct Answer: A) Subatomic Particles. 55. The electrons closest to an atom's nucleus have less ..... than those further away. A) Charge. B) Attraction. C) Energy. D) Mass. Show Answer Correct Answer: C) Energy. 56. The symbol for SILICON is ..... A) Sl. B) Si. C) S. D) Sc. Show Answer Correct Answer: B) Si. 57. $^{40 }$$_{18 }$Ar, the number of neutrons in this atom is A) 22. B) 58. C) 40. D) 18. Show Answer Correct Answer: A) 22. 58. How many electronic transitions are possible between the first five energy levels of a hydrogen atom? A) 5. B) 8. C) 12. D) 10. Show Answer Correct Answer: D) 10. 59. An electron is in 4f subshell ..... values of principal quantum number and azimuthal quantum number? A) 3, 0. B) 4, -3 to +3. C) 4, 3. D) 3, 4. Show Answer Correct Answer: C) 4, 3. 60. A state of matter made up of charged atoms, uncharged atoms, and free electrons A) Molecule. B) Plasma. C) Atomic. D) Atom. Show Answer Correct Answer: B) Plasma. ← PreviousNext →Related QuizzesScience QuizzesClass 11 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 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books