Unit 6 Structure of Atoms – General Science online quiz class 7 Leave a Comment / All Quiz Class 7 General Science, Chapter # 6, online quiz, test with answers Click here to prepare for Quiz 0% 0 votes, 0 avg 8 Unit 6 Structure of Atoms Class 7 General Science, Chapter # 6, Online Quiz 1 / 67 Category: General Science 1. With the help of chemical formula we can find: A. Name of elements present in the molecule. B. Number of atoms of each element. C. Composition of a compound. D. All of these 2 / 67 Category: General Science 2. Chlorine has seven electrons in its outermost shell, so the valency of chlorine is: A. 1 B. 2 C. 3 D. 4 3 / 67 Category: General Science 3. ______ have a positive (+) charge A. Protons   B. Neutrons C. Electrons D. Atom 4 / 67 Category: General Science 4. Sub-atomic or fundamental particles of atom have ____ types: A. 3 B. 6 C. 9 D. 2 5 / 67 Category: General Science 5. The first orbit near the nucleus is: A. L-shell B. K-shell C. M-shell D. N-shell 6 / 67 Category: General Science 6. An isotope of ____ is used to determine the age of old material like trees. A. Cobalt B. iodine C. Carbon (C-14) D. Uranium 7 / 67 Category: General Science 7. The sum of the number of protons and number of neutrons A. Mass number B. Atomic mass C. Both of them D. None of these 8 / 67 Category: General Science 8. If the outermost shell has more than four electrons, its valency will be equal to 8 minus the number of: A. Electrons present in K-shell B. Electrons present in the outermost shell C. Electrons present in M-shell D. Electrons present in L-shell 9 / 67 Category: General Science 9. _____ is the number of protons or electrons A. Atomic mass B. Atomic number C. Atom D. Neutrons 10 / 67 Category: General Science 10. Some isotopes are radioactive i.e they âradiateâ: A. water B. Energy  C. Light D. Air 11 / 67 Category: General Science 11. ____ isotopes are used to detect the leakage of pipelines. A. Cobalt B. iodine C. Carbon (C-14) D. Radio 12 / 67 Category: General Science 12. ____ have a negative charge. A. Protons B. Neutrons C. Electrons D. None of these 13 / 67 Category: General Science 13. Law of constant composition was presented by: A. Sir john Martial B. Democritus C. Alfarabi D. Joseph Proust 14 / 67 Category: General Science 14. Electron revolve around the nucleus in particular paths called A. orbit B. shells C. Both A & B D. None of these 15 / 67 Category: General Science 15. ____ revolve in orbits around the nucleus. A. Protons  B. Neutrons C. Electrons D. None of these 16 / 67 Category: General Science 16. Ions have ____ types: A. 1 B. 2 C. 3 D. 4 17 / 67 Category: General Science 17. Sodium has one electron in its outermost shell, so the valency of sodium is: A. 2 B. 0 C. 1 D. 3 18 / 67 Category: General Science 18. Atoms of same element having same number of protons but different number of neutrons are called: A. ION B. Valency C. Chemical formula D. Isotopes 19 / 67 Category: General Science 19. The representation of a molecule of a compound in the form of symbols is called: A. Cation B. Anion C. Valency D. Chemical formula 20 / 67 Category: General Science 20. The maximum number of electrons in first orbit K= A. 1 B. 3 C. 2 D. 4 21 / 67 Category: General Science 21. Every simple of pure substance always contains same elements in fixed proportion regardless of: A. Its source and method of preparation B. Its physical and chemical change C. Both of the above D. None of the above 22 / 67 Category: General Science 22. An element has seven electrons in its valence shell. Its valency is: A. 7 B. 0 C. 1 D. 8 23 / 67 Category: General Science 23. These have same number of protons in each atom but the neutron number can vary: A. Isotopes B. Molecules C. Ions D. Isobars 24 / 67 Category: General Science 24. The number of protons and the number of electrons are ___ A. Opposite B. Invisible C. Close D. Equal 25 / 67 Category: General Science 25. ______ no charge. A. Protons  B. Neutrons C. Electrons D. Atom  26 / 67 Category: General Science 26. ____ is a charged particle that is formed by the removal or addition of one or more electrons from an atom or molecule. A. ION B. Valency C. Chemical formula D. Isotopes 27 / 67 Category: General Science 27. Protium hydrogen has one proton, ____ neutron and one electron. A. 1 B. 2 C. 3 D. no 28 / 67 Category: General Science 28. Heavy hydrogen is: A. Protium âHâ B. Deuterium âDâ C. Tritium âTâ D. None of these 29 / 67 Category: General Science 29. The outermost orbit cannot have more than _____ electrons A. 18 B. 8 C. 32 D. 2 30 / 67 Category: General Science 30. Protons and neutrons reside in the nucleus, thus they are also known as: A. Element  B. Nucleus  C. Neutral D. Nucleons  31 / 67 Category: General Science 31. Physical properties of some isotopes may be: A. Different B. Same C. Few D. Many 32 / 67 Category: General Science 32. _____ reside in the nucleus. A. Protons B. Neutrons  C. Both A & B D. None of these 33 / 67 Category: General Science 33. Atom is electrically ____ A. negative B. Positive C. consumer D. Neutral 34 / 67 Category: General Science 34. Water always contain: A. 11.11% hydrogen B. 88.88% oxygen C. Both of the above D. None of the above 35 / 67 Category: General Science 35. ____ depends upon the number of electrons present in the outermost shell. A. ION B. Isotopes C. Valency D. Chemical formula 36 / 67 Category: General Science 36. An isotope of ____ is used as fuel in a nuclear reactor. A. Cobalt B. Goiter C. Carbon D. Uranium 37 / 67 Category: General Science 37. Atoms containing less than four electrons in its outermost shell, its valency is equal to the number of: A. Electrons present in K-shell B. Electrons present in valence shell C. Electrons present in M-shell D. Electrons present in L-shell 38 / 67 Category: General Science 38. The chemical properties of isotopes are the: A. Different B. Same C. Few D. Many 39 / 67 Category: General Science 39. The maximum number of electrons in second orbit L= A. 2 B. 4 C. 6 D. 8 40 / 67 Category: General Science 40. The word atom is derived from the Greek word âatomosâ which means: A. Small B. Smallest C. Things D. Indivisible 41 / 67 Category: General Science 41. The combining capacity of the atoms to form molecules either with same or different elements is known as A. ION B. Valency C. Chemical formula D. Isotopes 42 / 67 Category: General Science 42. Hydrogen has ____ isotopes: A. 1 B. 2 C.  3 D.  4 43 / 67 Category: General Science 43. An isotope of ____ is used in the treatment of cancer. A. Cobalt B. Goiter C. Carbon D. Uranium 44 / 67 Category: General Science 44. An atom of carbon contains 6 protons and 6 neutrons, its mass number will be A. 12 B. 6 C. 18 D. 24 45 / 67 Category: General Science 45. Ordinary naturally occurring hydrogen contains the largest percentage of: A. Protium âHâ B. Deuterium âDâ C. Tritium âTâ D. None of these 46 / 67 Category: General Science 46. The idea of atoms was first proposed by the Greek philosopher Democritus in A. 3rd century BC B. 5th Century AD C. 3rd century AD D. 5th Century BC 47 / 67 Category: General Science 47. ____ are the basic building block of matter and can take part in a chemical reaction. A. Molecule  B. Atom C. Sun light D. Soil 48 / 67 Category: General Science 48. The maximum number of electrons in third orbit M= A. 18 B. 14 C. 10 D. 8 49 / 67 Category: General Science 49. ____ has mass and occupies space A. Matter B. Atom C. Action and reaction D. Inertia 50 / 67 Category: General Science 50. The atoms of same elements which have same atomic number but different mass number are called: A. ION B. Valency C. Chemical formula D. Isotopes 51 / 67 Category: General Science 51. Mass number is nearly equal to atomic mass of an atom and is denoted by: A. âAâ B. âKâ C. âMâ D. âZâ 52 / 67 Category: General Science 52. Tritium isotope has one proton, ____ neutron and one electron. A. 1 B. 2 C. 3 D. no 53 / 67 Category: General Science 53. For treatment of goiter, an isotope of ____ is used: A. Cobalt B. iodine C. Carbon D. Uranium 54 / 67 Category: General Science 54. The maximum number of electrons in fourth orbit N= A. 18 B. 25 C. 32 D. 42 55 / 67 Category: General Science 55. If an electron or more than one electrons are removed from an atom, it become a positive ion which is also known as: A. Cation B. Anion C. Valency D. Chemical formula 56 / 67 Category: General Science 56. Atoms of different elements with different atomic numbers but have the same mass number are called: A. Isobars B. Valency C. Chemical formula D. Isotopes 57 / 67 Category: General Science 57. Each sample of carbon dioxide contains: A. 72.72% Oxygen B. 27.27% carbon C. Both of the above D. None of the above 58 / 67 Category: General Science 58. If an electron or more than one electrons are added to an atom, it becomes a negative ion which is also known as: A. Cation B. Anion C. Valency D. Chemical formula 59 / 67 Category: General Science 59. The number of tritium isotope is one in ____ millions. A. 10 B. 15 C. 20 D. 25 60 / 67 Category: General Science 60. Deuterium âDâ has one proton, ____ neutron and one electron A. 1 B. 2 C. 3 D. no 61 / 67 Category: General Science 61. Radioactive isotope of hydrogen is: A. Protium âHâ B. Deuterium âDâ C. Tritium âTâ D. None of these 62 / 67 Category: General Science 62. Atomic number is denoted by _____ A. âAâ B. âKâ C. âMâ D. âZâ 63 / 67 Category: General Science 63. The particle that carries a negative electrical charge. A. Proton B. Neutron C. Nucleus D. Electron 64 / 67 Category: General Science 64. The idea that all matter is made up of atoms was first proposed by the ____ philosopher. A. Latin B. British C. Greek D. French  65 / 67 Category: General Science 65. Protons and neutrons are responsible for most of the _____ A. Atomic number B. Atomic Mass C. Both A & B D. None of these 66 / 67 Category: General Science 66. The general formula for electrons distribution is: A. 2n B. 2+n C. 2n2  D. 2n4 67 / 67 Category: General Science 67. The center or core of an atom is called: A. Orbital B. Nucleus C. Proton D. Neutron Your score is The average score is 56% LinkedIn Facebook Twitter VKontakte 0% Restart quiz
