What is the shape of a water molecule? What is the shape of a phosphorus trichloride molecule? 1 What makes the molecules form the shapes that they do? 3 2 What is the shape of a dihydrogen sulfide molecule? What is the shape of a carbon dioxide molecule? Why are some molecules polar? 6 5 4 What is the electron configuration of magnesium ion? What is special about the elements in the ClIF H. BrON acronym? What is the most common ion formed by barium? 7 8 9 What is the most common ion formed by fluorine? What is the most common ion formed by copper? What is the most common ion formed by scandium? 11 10 12 What is the most common Show the e- dot diagrams ion formed by phosphorus? for the formation of sodium chloride. 13 Show the e- dot diagrams for the formation of calcium oxide. 15 14 Show the e- dot diagrams for the formation of strontium nitride. 16 Draw the electron dot structure for iron. Draw the electron dot structure for beryllium. 17 18 Draw the Lewis dot structure for sulfur. Draw the Lewis dot structure for hydrogen. Draw the Lewis dot structure for lead. 21 19 20 Write the electron configuration for Cu+2. Write the electron configuration for K+. Write the electron configuration for Co+2. 24 22 23 Write the electron configuration for V+3. 25 Based on the electron configuration of Au+, do you expect it to be colored in solution or colorless? (show the e- config.) Based on the electron configuration of Zn+2, do you expect it to be colored in solution or colorless? (show the econfig.) 27 26 Based on the electron configuration of Fe+3, do you expect it to be colored in solution or colorless? (show the e- config.) Why do atoms form ions? Give an example of a pseudo noble gas configuration. 29 30 28 Write the formula unit for a compound formed with potassium and nitrogen. Write the formula unit for a compound formed with rubidium and oxygen. Write the formula unit for a compound formed with magnesium and bromine. 32 33 Write the formula unit for a compound formed with silver and oxygen. What are the possible charges on the ions in X2Q? You only need to give one possibility. 35 36 31 Write the formula unit for a compound formed with zinc and phosphorus. 34 What are the possible charges on the ions in XQ2? You only need to give one possibility. What are the possible charges on the ions in XQ? You only need to give one possibility. 37 38 Explain why metals are good conductors of electricity. What is represented by the bands in band theory of metals? Why are ionic substance brittle? 39 What type of metal defect is beneficial in that it forms alloys? 42 40 41 What is the name of the metal defect when an atom is missing? What is it called when an atom of iron squeezes into the space between copper atoms in a sheet of copper? What is it called when an extra copper atom is found in the spaces between the orderly arranged copper atoms in the metal? 43 44 45 Why do ionic crystals need to be melted before they can conduct electricity? Will ionic compounds conduct electricity in solution? Explain. Without looking at an electronegativity chart, do you predict NaO to be ionic or covalent? Explain. 46 47 48 Without looking at an electronegativity chart, do you predict OF2 to be ionic or covalent? Explain. What type of solid is made of discrete molecules? Why must we use formula units for ionic compounds instead of molecular formulas? 49 50 49 Explain why neon is monatomic but chlorine is diatomic. Write an e- dot structure for I2. 53 52 51 Write an e- dot structure for OCl2. Write an electron dot structure for PF3. Write an e- dot structure for SiCl4. 54 Write an e- dot structure for N2. 56 55 Write an e- dot structure for CClFHBr. Write an e- dot structure for C2H2. Write an e- dot structure for C2H4 57 58 Write an e- dot structure for C2H6. What type of bonding gives substances with high melting points, do not dissolve in water? What type of bonding gives substances with high melting points and good conductivity in solid and molten form? 61 62 What type of bonding gives substances that are brittle and have low melting points? What type of bonding gives substances with high melting points and that dissolve in water? Name an example of an amorphous solid. 63 64 Name an example of a network solid. Name an example of a covalent compound with dipole/dipole interactions. Name an example of a covalent compound with dispersion forces. 66 67 68 Name a phenomenon that involves ion/dipole interactions. Draw an example of hydrogen bond in a substance. Draw an example of dipole/dipole interactions. 59 60 69 65 71 70 Draw an example of ion/dipole interactions. Draw an example of induced dipole interactions. Draw the Lewis structure for CO3-2. 74 72 73 Draw the Lewis structure for SO4-2. Draw the Lewis structure for PCl5. Draw the Lewis structure of Al2Cl6. 77 76 75 What type of bonding is shown between these water molecules? 78 Explain how geckos are able to walk up smooth glass walls. What type of bonding is shown between BrCl? 79 What type of bonding is shown between the molecules of this nonpolar substance? 80 Define a coordinate covalent bond. On a potential energy vs. distance between atoms graph, where will the lowest point be? 82 81 On a potential energy vs. distance between atoms graph, where will the highest point be? 83 Draw a perspective drawing of CH4. 85 86 84 Draw a perspective drawing of NH3. Is this molecule polar? CH4 Is this molecule polar? CHCl3 Is this molecule polar? NH3 87 88 89 Is this molecule polar? HCN Is this molecule polar? OF2 Is this molecule polar? CH2Cl2 90 91 92 Draw the e- dot structure of CO using a coordinate covalent bond. 93 Draw the e- dot structure of the ammonium ion, NH4+. 94 Draw the Lewis dot structure of the hydronium ion, H3O+. 95 Why does NH4+ have a positive charge? 96
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