Unit 5: Bonding Part 1 (Ionic & Metallic Bonding) DUE: Monday November 13, 2017
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1 Unit 5: Bonding Part 1 (Ionic & Metallic Bonding) The following pages are practice questions for this unit, and will be submitted for homework! You must complete: Lewis Structures for Atoms/Ions ALL QUESTIONS Criss-Cross/Dot Diagrams for Ionic Compounds ALL QUESTIONS Naming and Formula Writing: Binary Ionic Compound ALL QUESTIONS Ionic vs. Metallic Bonding Venn Diagram ALL QUESTIONS Practice Regents Questions ALL QUESTIONS DUE: Monday November 13,
2 Lewis Structures for Atoms/Ions Directions: Fill in the chart below and answer the questions that follow. Electron Lewis Dot Electron Element Element Configuration Structure Configuration Lewis Dot Structure H C H +1 C -4 He N Li N -3 Li +1 O Be O -2 Be +2 F B F -1 B +3 Ne 1. What do the dot structures represent? 2. Do metals for positive or negative ions? Explain how in terms of electrons. 3. Do non-metals form positive or negative ions? Explain how in terms of electrons? 4. What do you notice about the dot structures of the metal ions? Explain. 5. What do you notice about the dot structures of non-metal ions? Explain. 2
3 Criss-Cross/Dot Diagrams for Ionic Compounds Directions: Fill in the table below. Use the Criss-Cross Method to determine the formula. Once you determine the formula, draw the Lewis Dot Diagram for the Ionic Compound. Cation Anion Formula Lewis Dot Structure Ca 2+ F 1- Cu 2+ S 2- Na 1+ P 3- Ag 1+ P 3- Ba 2+ Cl 1-3
4 Naming and Formula Writing: Binary Ionic Compounds Directions: First quickly scan the worksheet and circle any metals (as a symbol or as a name) that is a transition metal. Then either give the same or chemical formula as necessary for each problem below. Remember that transition metals can have multiple oxidation states, so you are required to indicate the appropriate oxidation state in parenthesis when naming them. You must use the subscript and oxidation state of the anion to help determine the oxidation state of the transition metal. 1. LiF à 21. Lithium chloride à 2. Li 2 O à 22. Lithium nitride à 3. Li 3 P à 23. Beryllium fluorideà 4. BeP à 24. Beryllium sulfide à 5. BF 3 à 25. Boron chloride à 6. BBr 3 à 26. Boron oxide à 7. BN à 27. Sodium fluoride à 8. CuF à 28. Copper (II) chloride à 9. Cu 2 O à 29. Copper (II) oxide à 10. Cu 3 N à 30. Copper (II) nitride à 11. Na 2 O à 31. Sodium nitride à 12. PbF 2 à 32. Lead (IV) fluoride à 13. PbS à 33. Lead (IV) sulfide à 14. Pb 3 N 4 à 34. Lead (IV) oxide à 15. FeF 3 à 35. Iron (II) bromide à 16. Fe 2 O 3 à 36. Chromium (VI) phosphide à 17. FeP à 37. Aluminum fluoride à 18. AlI 3 à 38. Aluminum oxide à 19. Mn 2 O 7 à 39. Manganese (IV) bromide à 20. SnSe à 40. Tin (IV) oxide à 4
5 Ionic vs. Metallic Bonding Venn Diagram Directions: For each of the statements below, place them in the correct section of the graphic organizer. Statements: Connects two atoms Occurs between metals Compounds are brittle Good at conducting electricity in both the solid and liquid phase High melting points Occurs between a metal and non-metals High boiling points Compounds are malleable Good conductor of electricity when in solution or melted Ionic Bonds Metallic Bonds 5
6 Practice Regents Questions 1. What is represented by the dots in a Lewis electron-dot diagrams of an atom of an element in Period 2 of the Periodic Table? a. The number of neutrons in the atom b. The number of protons in the atom c. The number of valence electrons in the atom d. The total number of electrons in the atom 2. An atom in the ground state contains a total of 5 electrons, 5 protons, and 5 neutrons. Which Lewis electron-dot diagram represents this atom? 3. Which electron-dot symbol represents the atom in Period 4 with the highest first ionization energy? 4. Which Lewis electron-dot diagram represents calcium oxide? 5. In which compound is the ratio of metal ions to nonmetals ions 1 to 2? a. Calcium bromide c. Calcium phosphide b. Calcium oxide d. Calcium sulfide 6. Which sample of matter has a crystal structure? a. Hg (l) b. H 2 O (l) c. NaCl (s) d. CH 4 (g) 7. Base your answer to the following question on the information and on your knowledge of chemistry. The Lewis electron-dot diagrams for three substances are shown below. Describe, in terms of valence electrons, how the chemical bonds form in the substance represented in diagram 1. 6
7 8. Explain, in terms of element classification, why K 2 O is an ionic compound. 9. Identify they type of bonding in solid potassium. 10. Base your answer to the following question on the information below and on your knowledge of chemistry. A sample of seawater is analyzed. The table below gives the concentration of some ions in the sample. Concentration of Some Ions in a Seawater Sample Ion Concentration (M) Cl Na Mg SO Ca K Write a chemical formula of one compound formed by the combination of K+1 ions with one of these ions as water completely evaporates from the seawater sample. 7
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