Metallic Bonding in Mg and Electrostatic Attraction
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Questions and Answers

How many electrons are in the outer shell of IF4+?

  • 8
  • 6
  • 9
  • 7 (correct)
  • Which atom is the most electronegative element?

  • Oxygen
  • Nitrogen
  • Chlorine
  • Fluorine (correct)
  • What is the total number of electrons in SF4's outer shell after removing one electron as positively charged?

  • 9
  • 8
  • 11
  • 10 (correct)
  • How does electronegativity change as you move across a period?

    <p>It increases</p> Signup and view all the answers

    What determines where a compound lies on the continuum of bonding type between ionic and covalent bonding?

    <p>Electronegativity differences</p> Signup and view all the answers

    In IF4+, how many bond pairs and lone pair are there in the outer shell?

    <p>4 bond pairs, 1 lone pair</p> Signup and view all the answers

    Why does metallic bonding get stronger in Mg compared to other metals?

    <p>More electrons are released to the sea of electrons</p> Signup and view all the answers

    What type of bonding is present in sodium chloride?

    <p>Ionic</p> Signup and view all the answers

    Which substance has a giant molecular structure?

    <p>Diamond</p> Signup and view all the answers

    Why do simple molecular substances have low boiling and melting points?

    <p>Because of the weak intermolecular forces between molecules</p> Signup and view all the answers

    What property of metallic substances causes them to have high boiling and melting points?

    <p>Giant lattice of ions with strong electrostatic forces</p> Signup and view all the answers

    In which type of bonding are electrons shared between atoms?

    <p>Covalent (macromolecular)</p> Signup and view all the answers

    What happens to metal atoms in the process of ionic bonding?

    <p>They lose electrons to form positive ions</p> Signup and view all the answers

    Why are positive ions smaller compared to their original atoms?

    <p>They have one less shell of electrons</p> Signup and view all the answers

    What contributes to the strength of ionic bonding and the resulting higher melting points?

    <p>Smaller ions with higher charges</p> Signup and view all the answers

    Why do negative ions formed from groups five to seven tend to be larger than their corresponding atoms?

    <p>They have more electrons but the same number of protons</p> Signup and view all the answers

    How does the effective nuclear attraction per electron change from Nitrogen (N) to Fluorine (F) in terms of ionic radius?

    <p>It increases</p> Signup and view all the answers

    Which pair of ions has the same electronic structure as the noble gas Neon (Ne)?

    <p>$Mg^{2+}$ and $Al^{3+}$</p> Signup and view all the answers

    In molecular geometry, what happens to bond angles when there are lone pairs of electrons present?

    <p>They decrease because lone pairs repel more than bonding pairs.</p> Signup and view all the answers

    What effect do lone pairs have on the bond angles in a molecular structure?

    <p>They decrease bond angles due to increased repulsion.</p> Signup and view all the answers

    How does the presence of lone pairs impact the shape of a molecule?

    <p>It distorts the molecule from its ideal geometry.</p> Signup and view all the answers

    When lone pairs are present in a molecule, what is the general trend observed in bond angle values?

    <p>Bond angles decrease because lone pairs repel more than bonding pairs.</p> Signup and view all the answers

    How do lone pairs influence the bond angle reduction in a molecule compared to bonding pairs?

    <p>Lone pairs cause greater reduction in bond angles than bonding pairs.</p> Signup and view all the answers

    Which statement accurately describes how lone pairs affect bond angles in molecular structures?

    <p>Lone pairs decrease bond angles by causing increased electron repulsion.</p> Signup and view all the answers

    Which type of compound will be purely covalent?

    <p>A compound with elements of similar electronegativity</p> Signup and view all the answers

    What happens in a polar covalent bond?

    <p>There is a charge separation due to unequal electron distribution</p> Signup and view all the answers

    Why is CO2 considered non-polar?

    <p>It contains highly symmetrical bonds</p> Signup and view all the answers

    Which type of forces occur between all molecular substances and noble gases?

    <p>Van der Waals' forces</p> Signup and view all the answers

    In which type of molecule do the individual dipoles 'cancel out'?

    <p>Symmetric molecules</p> Signup and view all the answers

    What defines the polarity of a compound?

    <p>The type of bonds present</p> Signup and view all the answers

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