Structure & Bonding (Double) quiz Loading... 1. Explain why magnesium oxide has a higher melting point than sodium chloride.Mg²⁺ and O²⁻ ions are larger than sodium and chloride therefore the electrostatic forces between the ions are much stronger. This requires more energy to break.Mg²⁺ and O²⁻ ions have a higher charge than sodium and chloride therefore the electrostatic forces between the ions are much stronger. This requires more energy to break.Magnesium and oxygen are more reactive elementsSodium chloride is a simple molecular substance so there are only weak intermolecular forces which require little energy to breakQuestion 1 of 12 Loading... 2. Explain, in terms of its structure, why graphite can act as a lubricant.Graphite has strong forces of attraction between layers. These layers can slide over each otherGraphite has a low melting point so becomes liquid when heated by frictionGraphite is a smooth metal so creates a surface with little frictionGraphite has weak forces of attraction between layers. These layers can slide over each otherQuestion 2 of 12 Loading... 3. How can atoms get a full outer shell?Either the transfer (ionic) or sharing (covalent) of electronsConversion of electrons to protonsOnly transfer (ionic) of electronsEither the transfer (covalent) or sharing (ionic) of electronsQuestion 3 of 12 Loading... 4. When are ions attracted to each other?When the ions are very smallWhen the ions are oppositely chargedWhen the ions are the same sizeWhen the ions have the same chargeQuestion 4 of 12 Loading... 5. When can ionic substances conduct electricity?NeverIn any stateOnly when moltenWhen molten or dissolvedQuestion 5 of 12 Loading... 6. A substance is found not to conduct electricity even when molten. What type of bonding does the substance have?Covalent or ionicMetallicIonicCovalentQuestion 6 of 12 Loading... 7. In the dot and cross diagram of the outer electrons showing the covalent bonding in a molecule of chlorine (Cl₂), how many electrons should be shown in areas 1, 2 and 3?There should be two electrons in area 2 and six in each of areas 1 and 3There should be four electrons in area 2 and three in each of areas 1 and 3There should be two electrons in area 2 and seven in each of areas 1 and 3There should be four electrons in each of areas 1, 2 and 3Question 7 of 12 Loading... 8. Why is the boiling point of a larger molecule higher than that of a smaller molecule?Larger molecules have fewer attractions between them. These take less energy to overcome.Larger molecules have fewer attractions between them. These take more energy to overcome.Larger molecules have more attractions between them. These take less energy to overcome.Larger molecules have more attractions between them. These take more energy to overcome.Question 8 of 12 Loading... 9. Describe the formation of a covalent bondThe sharing of a pair of electrons between two nucleiThe electrostatic attraction between positive metal ions and a sea of delocalised electronsThe sharing of a single electron between two nucleiThe transfer of electrons from one atom to anotherQuestion 9 of 12 Loading... 10. Explain why Silica, SiO₂ is a solid with a high melting pointSilica has a giant metallic structure with weak forces of attraction between layersSilica has a simple molecular structure with weak intermolecular forces that require little energy to overcomeSilica has a simple molecular structure with strong intermolecular forces that require a lot of energy to overcomeSilica has a giant covalent structure with many strong covalent bonds that need a lot of energy to breakQuestion 10 of 12 Loading... 11. Give the definition of a covalent bondStrong electrostatic attraction between a shared pair of electrons and a nucleusStrong electrostatic attraction between oppositely charged ionsStrong electrostatic attraction between a postive ion and a sea of delocalised positive ionsStrong electrostatic attraction between a shared pair of electrons and two nucleiQuestion 11 of 12 Loading... 12. Explain why carbon dioxide gas, CO₂, is a gas at room temperatureCarbon dioxide has a simple molecular structure with weak intermolecular forces that require little energy to overcomeCarbon dioxide has a giant covalent structure with many weak covalent bonds which require little energy to overcomeCarbon dioxide has a simple molecular structure with strong intermolecular forces that require a lot of energy to overcomeCarbon dioxide has a giant covalent structure with many strong covalent bonds which require a lot of energy to overcomeQuestion 12 of 12 Loading... Related Posts:The entire quiz question bank!The entire quiz question bank (Double only)!Key Calculations quizEquilibria (triple) quizCondensation Polymers quizElectrolysis quiz Hydr0Gen2020-03-11T12:55:09+00:00Categories: Uncategorized|Tags: Quiz, Topic: Structure & Bonding| Share This Story, Choose Your Platform! FacebookTwitterRedditLinkedInTumblrPinterestVkEmail
