attraction is less so electrons are removed with ease. 6. Decreasing order of electronegativity would be F, Cl, Al because as nuclear charge increases the ability to gain an electron increase. 7. Decreasing order of chemical reactivity would be Na, MG, Rb because as nuclear charge increases it’s harder to lose electrons thus less reactive. 8. Ionization and electronegativity should follow the same pattern for families and periods because as nuclear energy is increased it can make it harder to remove and electron but more likely to gain an electron. 9. a. Ionic b. Covalent c. Ionic d. Covalent 10. Three differences between Ionic bonds and Covalent bonds are: 1) Ionic bonds are between a metal and non-mental vs covalent bonds that are between two non-metals. 2) Covalent bonds share electrons, ionic bonds take or gain electrons 3) Covalent bonds are liquids or gases, ionic bonds are solids. 11. a. Kbr, ionic bond b. CoCl 2 , Ionic bond Page 3 of 5
SCH3UC Unit 1 Key Questions May 16, 2018 c.Li 2 O, ionic bond d.SiCl 4 , covalent single bond e.PF 3 , covalent single bond f.CS 2 , covalent double bond g. HCN, covalent single and triple bond Page 4 of 5
SCH3UC Unit 1 Key Questions May 16, 2018 12. a) Pyramid, polar b) Tetrahedron, non-polar c) Linear, polar d) Linear, non-polar 13. A: Non-polar covalent because it is insoluble and has a low melting point. B: Polar covalent because it has a low melting point and is soluble. C: Ionic because it has a very high melting point and is soluble. D: Non-polar covalent because it is insoluble and has a low melting point. E: Polar covalent because it has a low melting point and is soluble. F: Ionic because it has a very high melting point and is soluble. Page 5 of 5
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