General Chemistry 1 Quiz 2 - Answer Key PDF

NAME: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ SCORE: \_\_\_\_\_\_\_\_\_ SECTION: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ DATE: \_\_\_\_\_\_\_\_\_ **QUIZ NO. 2** **GENERAL CHEMISTRY 1** **Read each item carefully and choose the best...

NAME: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ SCORE: \_\_\_\_\_\_\_\_\_ SECTION: \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ DATE: \_\_\_\_\_\_\_\_\_ **QUIZ NO. 2** **GENERAL CHEMISTRY 1** **Read each item carefully and choose the best answer that corresponds to your answer. Write the letter before each number.** \_\_\_\_\_1. What dictates the stability of the atoms during chemical bonding? A. Electronic Configuration C. Magnetic property of the atom B. Lewis Dot Structure **D. Octet Rule** \_\_\_\_\_2. What is valence electron? A. The atomic number B. Electrons in the first level C. Electrons in the second energy level D. **Electrons in the outermost energy level** \_\_\_\_\_3. Which of the following bonds of elements follows the octet rule? A. H-H **C. H-F** B. Cl-Cl D. H-Cl \_\_\_\_\_4. In the Lewis structure for the OF2 molecule, the number of lone pairs of electrons around the central oxygen atom is \_\_\_\_\_. A. 0 B. 1 **C. 2** D. 3 \_\_\_\_\_5. Which one of the following violates the octet rule? A. PCl3 B. CBr4 C. OF2 **D. AsF5** \_\_\_\_\_6. In the ground state, which of the following has a completely filled valence electrons? A. Potassium **C. Radon** B. Radium D. Sulfur \_\_\_\_\_7. How many electrons does Nitrogen need to gain in order to have an octet? A. 2 **B. 3** C. 4 D. 5 \_\_\_\_\_8. According to the octet rule, atoms of element react with each other in order to attain \_\_\_ in their outermost energy level. Which among the numbers below completes the sentence? A. 5 B. 6 C. 7 **D. 8** \_\_\_\_\_9. Who formulated the Octet Rule? A. Richard Abegg C. Isaac Newton **B. Gilbert N. Lewis** D. Dmitri Mendeleev \_\_\_\_\_10. How many electrons needed by Phosphorus in order to complete the Octet Rule? A. 2 **B. 3** C. 4 D. 5 \_\_\_\_\_11. Which of the following statement is TRUE? A. A covalent bond is the same as ionic bond. B. The Octet rule only applies to molecules with covalent bonds. C. A molecule is polar if the shared electrons are equally shared. **D. A molecule is nonpolar if the shared electrons are equally shared.** \_\_\_\_\_12. When atoms tend to share their electrons with one another to satisfy the Octet rule, the type of bond formed is \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_. **A. Covalent** B. Ionic C. both D. none of these \_\_\_\_\_13. Which of the following statement is **TRUE** about Octet rule? A. The octet rule states that atoms with six valence electrons are most stable. B. An atom is "incomplete" when its valence shell has eight electrons; \"complete\" atoms share electrons and in so doing end up with full valence shells. C. The octet rule is a formal measure of how favorable a chemical bond is between atoms. **D. Atoms follow the octet rule because they always seek the most stable electron configuration.** \_\_\_\_\_14. What type of diagram is use in order to illustrate the octet rule? A. Histogram **C. Lewis Electron Dot Diagram** B. Pie graph D. Venn Diagram \_\_\_\_\_15. In a chemical bonding, the unshared electrons are called \_\_\_\_\_\_\_\_\_\_\_\_\_\_. A. Alone pair **C. lone pair** B. Bonding pair D. metal pair \_\_\_\_\_16. A covalent molecule has three bonding electron pairs and one lone pair. The molecule has a general formula of AX3E. Which of the following choices is the correct shape of the molecule? A. A. Linear B. Planar C. Tetrahedral **D. Trigonal Pyramidal** \_\_\_\_\_17. How do you describe the shape of methane, CH4? A. A. Octahedral B. Planar **C. Tetrahedral** D. Trigonal Pyramidal \_\_\_\_\_18. How do you describe the shape of the molecule that looks like the figure below? A. A. Bent B. Octahedral C. Tetrahedral **D. Trigonal planar** \_\_\_\_\_19. Which of the following choices is represented by a covalent bond electron/s? A. A single shared C. A pair of transferred **B. A pair of shared** D. A pair of unshared \_\_\_\_\_20. How many covalent bonds can carbon form? A. Two B. Three **C. Four** D. Six \_\_\_\_\_21. How do you describe the shape of methane, CH4? A. Linear B. Octahedral **C. Tetrahedral** D. Trigonal Planar \_\_\_\_\_22. What shape is formed when there are two (2) electron pairs in a certain covalent compound? **A. Linear** B. Planar C. Tetrahedral D. Trigonal \_\_\_\_\_23. What shape is formed by a chemical compound with109.50 bond angle having 2 electron pairs and 2 lone pairs? **A. Bent** B. Octahedral C. Tetrahedral D. Trigonal Planar \_\_\_\_\_24. What is the bond angle of an octahedral structure of a covalent compound? **A. 90^0^** B. 109.5^0^ C. 120^0^ D. 180^0^ \_\_\_\_\_25. Your teacher asked you to draw the Lewis structure of a trigonal planar molecule, which of the following should have been drawn? **(B)**  \_\_\_\_\_26. Which of the following geometric shapes has one lone pair of electrons? A. Octahedral B. Tetrahedral C. Trigonal Planar **D. Trigonal Pyramidal** \_\_\_\_\_27. Which one *CORRECTLY* shows trigonal planar? **(B)** \_\_\_\_\_28. Which of the figures in **number 27 choices** shows the molecular structure of water, H2O? **(A)** \_\_\_\_\_29. Which one in number 27 choices has an angle of 120^0^? **(B)** \_\_\_\_\_30. How will you draw the Lewis model of a molecule with a general formula of AB3E? Select your answer from number 27 choices. **(C)**