Structure & Bonding (Double) quiz Loading... 1. In the dot and cross diagram of the outer electrons showing the covalent bonding in a molecule of hydrogen chloride (HCl), how many electrons should be shown in areas 1, 2 and 3?There should be zero electrons in areas 1 and 3, and two electrons in area 2There should be zero electrons in area 1, two electrons in area 2, and six electrons in area 3There should be one electron in area 1, two electrons in area 2, and seven electrons in area 3There should be six electrons in area 1, two electrons in area 2, and six electrons in area 3Question 1 of 12 Loading... 2. What holds ions together?Ions are held together by a strong magnetic attraction between the oppositely charged ionsIons are held together by a strong electrostatic attraction between the similarly charged ionsIons are held together by a strong electrostatic attraction between the shared pair of electrons and their nucleiIons are held together by a strong electrostatic attraction between the oppositely charged ionsQuestion 2 of 12 Loading... 3. If a substance has a simple molecular structure, what physical state might it be at room temperature?Any stateSolidSolid or liquidGas or liquidQuestion 3 of 12 Loading... 4. What is needed to complete this diagram to show the ionic bonding in magnesium chloride, MgCl₂ ?1) eight electrons around the chloride (seven dots and one cross) 2) A charge of +2 on the magnesium and -1 on the chloride 3) A second magensium ion the same as the first1) eight electrons around the chloride (seven dots and one cross) 2) A charge of +2 on the magnesium and -1 on the chloride 3) A second chloride ion the same as the first1) eight electrons around the magnesium (any combination of dots and one crosses) 2) A charge of +2 on the magnesium and -1 on the chloride 3) A second chloride ion the same as the first1) eight electrons around the chloride (seven dots and one cross) 2) A charge of +1 on the magnesium and -2 on the chloride 3) A second chloride ion the same as the firstQuestion 4 of 12 Loading... 5. 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 giant covalent structure with many strong covalent bonds that need a lot of energy to breakSilica 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 overcomeQuestion 5 of 12 Loading... 6. Give the definition of a covalent bondStrong electrostatic attraction between a postive ion and a sea of delocalised positive ionsStrong electrostatic attraction between a shared pair of electrons and two nucleiStrong electrostatic attraction between oppositely charged ionsStrong electrostatic attraction between a shared pair of electrons and a nucleusQuestion 6 of 12 Loading... 7. Explain, in terms of structure and bonding, 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.Sodium chloride is a simple molecular substance so there are only weak intermolecular forces which require little energy to breakMagnesium and oxygen are more reactive elementsNaCl and MgO both have a giant ionic structure with strong electrostatic forces between oppositely charged ions. The Ions in MgO have a charge of 2 and -2, but in NaCl the charges are 1 and -1. So the bonds in MgO require more energy to breakQuestion 7 of 12 Loading... 8. Do ionic substances conduct electricity?Not when solid, but they do when either molten or in solutionYes, ionic substances always conduct electricityOnly when moltenNo, ionic substances never conduct electricityQuestion 8 of 12 Loading... 9. Describe the formation of a covalent bondThe sharing of a single electron between two nucleiThe electrostatic attraction between positive metal ions and a sea of delocalised electronsThe transfer of electrons from one atom to anotherThe sharing of a pair of electrons between two nucleiQuestion 9 of 12 Loading... 10. Do larger molecules have higher or lower boiling points than smaller molecules?LowerSize doesn\'t affect boiling pointHigherIt depends on which atoms are presentQuestion 10 of 12 Loading... 11. Typically, do covalent substances conduct electricity?NoDepends on conditions (e.g. pressure, temperature etc.)YesDepends on the substanceQuestion 11 of 12 Loading... 12. 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 weak forces of attraction between layers. These layers can slide over each otherGraphite is a smooth metal so creates a surface with little frictionGraphite has a low melting point so becomes liquid when heated by frictionQuestion 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
