Quarter 2 Science 9 Test Questions

NAME: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_           SECTION:\_\_\_\_\_\_\_\_\_\_\_\_\_        DATE: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ **GENERAL INSTRUCTIONS: ** Read and analyze the given incomplete statements, questions, and illustrations below. Write your answer in **CAPITA...

NAME: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_           SECTION:\_\_\_\_\_\_\_\_\_\_\_\_\_        DATE: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ **GENERAL INSTRUCTIONS: ** Read and analyze the given incomplete statements, questions, and illustrations below. Write your answer in **CAPITAL LETTER** that best completes each statement or that best answers each question. 1. Which term refers to the set of numbers that describes the most probable location and energy state of an electron in an atom? A. A. Azimuthal quantum number B. Magnetic quantum number C. Quantum numbers D. Spin quantum number 2. 3. Which atom has an electron configuration of 1s²2s² 2p⁶? A. B. Argon C. Helium D. Neon E. Xenon 4. 5. Which of the following best describes the principal energy level of an atom? A. The direction of electron spin. B. The energy level the electron occupies. C. The sublevel or shape of the orbital. D. The orientation of orbitals around the nucleus. 6. Which subatomic particle has a negative charge? A. B. Electron C. Neutron D. Nucleus E. Proton 7. 8. Which of the following represents the correct electron configuration of nitrogen (Atomic Number 7)? A. B. 1s² 2s² 2p³ C. 1s² 2s² 2p⁴ D. 1s² 2s² 2p⁵ E. 1s² 2s² 2p⁶ 9. 10. How does the Quantum Mechanical Model of the atom differ from earlier atomic models in describing electron positions? A. It identifies electrons as tiny solid particles with specific paths. B. It states that electrons are evenly distributed across energy levels. C. It specifies fixed orbits where electrons revolve around the nucleus. D. It uses probability to describe the likely location of electrons in orbitals. 11. What does the Quantum Mechanical Model suggest about the movement of electrons in an atom? A. Electrons are stationary within the atom. B. Electrons move in circular orbits around the nucleus. C. Electrons exist within regions of space called orbitals. D. Electrons move in defined straight paths around the nucleus. 12. What does the superscript number in an electron configuration indicate? A. The charge of the atom. B. The speed of the electrons. C. The energy level of the orbital. D. The number of electrons in a specific orbital or sublevel. 13. How does the Aufbau principle guide the writing of electron configurations? A. Electrons occupy orbitals with the highest energy first. B. Each orbital can hold an unlimited number of electrons. C. Electrons fill orbitals from the lowest to the highest energy level. D. Electrons pair up in orbitals before occupying separate ones. For question 10, refer to diagram 1, Orbital Diagram of Helium. Source: 14. Examine the orbital diagram. How does the arrangement of electrons reflect the Pauli Exclusion Principle? A. Electrons occupy orbitals singly before pairing up. B. Electrons in the same orbital must have opposite spins. C. Electrons in this configuration violate the Pauli Exclusion Principle. D. Electrons in the orbital have the same energy and spin direction. For question 11, refer to diagram 2, Electron Configuration 15. The diagram shows three orbitals (s, p, d, and f) with varying numbers of electrons. Analyze the diagram to determine which orbital violates the maximum electron capacity rule. A. The s orbital violates the rule, as it can hold more than two electrons. B. The p orbital violates the rule, as it can hold only six electrons. C. The d orbital violates the rule, as it can hold only five electrons. D. The f orbital violates the rule, as it can hold more than 18 electrons. 16. What specific type of bond is formed between two nonmetal elements? A. B. Chemical bond C. Covalent bond D. Ionic bond E. Metallic bond 17. 18. Which of the following property best describes ionic compounds? A. It is soft and flexible. B. It is crystal lattice structure. C. It is liquid or gaseous state at room temperature. D. It cannot conduct electricity in solid or in melted form. 19. Which of the following is an example of a covalent bond? A. B. CaO C. LiCl D. BeF E. NH₃ 20. 21. Which of the following is an example of ionic bond? A. B. KF C. H₂O D. CO₂ E. CO 22. 23. Which substance conducts electricity when dissolved in water? A. B. gasoline C. paraffin wax D. sugar E. sodium chloride 24. 25. Which is NOT a property of covalent compound? A. It has low melting point B. It exists in a stable crystalline structure. C. It does not exhibit any electrical conductivity. D. It is usually solid at normal temperature and pressure. For question 18, refer to diagram 3, Arrangement of Particles Source: 26. The figure on the right represents the arrangement of particles in a substance. What kind of substance is this? A. B. Covalent compound C. Ionic compound D. Metallic compound E. Metal and metal compounds 27. 28. Which of the following properties is most indicative of an ionic compound? A. Low hardness B. It conducts electricity in solid form. C. It has weak bonds and nonpolar characteristics. D. Solubility in water and electrical conductivity in solution. For questions 20-22, refer to diagram 3, Chemical Bonding Source: 29. What specific type of chemical bond is formed between Sodium and Fluorine? A. B. Chemical bond C. Covalent bond D. Ionic bond E. Metallic bond 30. 31. Which element transfers an electron in this chemical bonding? A. B. Fluorine C. Sodium D. Sodium fluoride E. Both Fluorine and Sodium 32. Which of the following statements about the chemical bond between sodium and fluorine is NOT true? A. Sodium transfers one electron to fluorine. B. Fluorine accepts one electron from Sodium. C. Sodium and fluorine share electrons equally. D. Sodium and fluorine have opposite electrical charges. 33. What do you call the ion which carry positive charge in its atom? A. B. Anion C. Cation D. Ions E. Neutral atom 34. 35. Which term refers to the electron in the outermost energy level that is responsible for chemical bonding? A. B. Atom C. Electron D. Proton E. Valence electron 36. 37. What do you call the ion which carry negative charge in its atom? A. B. Anion C. Cation D. Ions E. Neutral atom 38. 39. Which of the following Lewis Dot Structures correctly represents Chlorine (Cl)? A. B. C.  D. E.  40. 41. An element is found in Family II and Period III of the Periodic Table of elements. What is its valence electron? A. B. 1 C. 2 D. 3 E. 4 42. 43. Carbon element is vital among living things. They were considered carriers of 'spark of life'. What makes carbon such a unique element? A. Carbon can form single, double, and triple bonds. B. Carbon forms covalent bonds rather than ionic bonds. C. Elemental carbon comes in two forms, diamond and graphite. D. Carbon forms four bonds, although the ground state configuration would predict the formation of fewer bonds. 44. This carbon compound is a primary component of natural gas. It consists of one carbon atom and four hydrogen atoms. When it is present in the atmosphere it affects our planet's temperature and climate system. Which of the following represents this simple carbon compound? A. B. Acetic acid C. Alcohol D. Formalin E. Methane 45. 46. The second class of simple hydrocarbon consists of molecules that contain at least one double-bonded carbon pair. Which hydrocarbon compound has a double bond in the molecule? A. B. Alkane C. Alkene D. Alkone E. Alkyne 47. 48. During a flu outbreak in the community, a mother goes to the grocery once a week. After putting all the grocery items in her trolley, she applies this on her hand for disinfection purposes. Which organic compound is this? A. B. Acetone C. Formalin D. Isopropyl alcohol E. Kerosene 49. 50. Maria's car stopped along Marcos Highway because the car ran out of fuel. Which compound must she buy to continue driving? A. B. Gasoline C. Kerosine D. Oil E. Water 51. 52. Which of the following statements best describe organic compounds? A. Organic compounds are composed mainly of carbon and hydrogen. B. Organic compounds are compounds that contain carbon atoms only. C. Organic compounds are compounds that contain carbon and helium only. D. Organic compounds are compounds that are produced by non-living things only. For question 34-36, refer to diagram 4: Carbon Compound Source: 53. Which group of hydrocarbons does the figure 3 belong to? A. B. Alkane C. Alkene D. Alkone E. Alkyne 54. 55. How many hydrogen atoms are required in the given organic compound? A. B. 2 C. 4 D. 6 E. 8 56. 57. Which IUPAC name best describes the given organic compound? A. B. Ethane C. Ethene D. Ethone E. Ethyne 58. 59. The viscosity of hydrocarbons depends on the size of their molecules. Which of the following best describes viscosity? A. It is the smell of the compound. B. It is the measure of how easily the material burns. C. It is the measure of a liquid's resistance to flow. D. It is the measure of the tendency of a compound to evaporate or turn to vapor 60. Which of the following best describes odor as the properties of organic compounds A. It is the smell of the compound. B. It is the measure of a liquid's resistance to flow. C. It is the measure of how easily the material burns. D. It is the measure of the tendency of a compound to condense. 61. Juan Victor's grandmother was cooking their supper when she suddenly stopped and said, "Oh, the tank is already empty!" Then her grandmother asked him to buy another tank. What did Victor's grandmother ask him to buy? A. B. Acetic acid C. Formalin D. Gasoline E. Water 62. 63. Burnham Park bike owners managed to protect their bicycle's parts from rusting fast. Which organic compound? A. B. Acetone C. Isopropyl alcohol D. Lubricating oil E. Vinegar 64. 65. Belen wants to change her nail polish from marine blue to grungy pink shattered wall pattern nail polish to look good with her new dress. What must she use to remove the nail polish? A. B. Acetic acid C. Acetone D. Butane E. Formalin 66. 67. Mang Lowel, a fisher man, went home with some of his catch and told his son to cook the fish. But his son said, "Father the stove ran out of fuel already". Then his father told him to buy some so that they could start cooking the fish. Which organic compound do you think the boy will buy? A. B. Acetone C. Kerosene D. Lubricating oil E. Isopropyl alcohol 68. 69. Which of the following is the molecular formula of methane? A. B. CH₄ C. CH₃CH₃ D. H₂C = CH₂ E. CH₃CH₂CH₃ 70. 71. How many atoms are there in 1 mole of Silver? A. B. 47 x 10²³ C. 1.5 x 10²³ D. 6.02 x 10²² E. 6.02 x 10²³ 72. 73. Given the atomic masses of Sulfur (32 g) and Oxygen (16 g), what is the molar mass of sulfate (SO₄)? A. B. 93 g/mol C. 96 g/mol D. 98 g/mol E. 100 g/mol 74. 75. How many atoms are there in 3 moles of Oxygen? A. B. 1.70 x 10²² C. 1.70 x 10²³ D. 1.81 x 10²³ E. 1.81 x 10²⁴ 76. 77. Compute the molar mass of CO₂. A. B. 28.01 g/mol C. 29.01 g/mol D. 44.01 g/mol E. 45.5 g/mol 78. 79. How many atoms are there in 2 moles of Potassium? A. B. 1.20 x 10²⁴ C. 1.21 x 10²⁴ D. 1.22 x 10²⁴ E. 1.23 x 10²⁴ 80. 81. Compute the molar mass of SO₂. A. B. 64.06 g/mol C. 65.06 g/mol D. 66.06 g/mol E. 67.06 g/mol 82. 83. Compute the molar mass of Mg(OH)₂. A. B. 58.33 g/mol C. 59.33 g/mol D. 60.33 g/mol E. 61.33 g/mol Prepared by: Approved by: **CYNTHIA R. RECTO RIONA B. COPILING** Science Teacher School Principal