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1. What is a covalent bond?

  • the electrostatic attraction between ions with the same charge
  • the electrostatic attraction between two oppositely charged ions
  • a shared pair of electrons
  • 1 shared electron
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2. What charge does the Sulfate SO4 ion carry?

  • 2-
  • 4-
  • 4+
  • 2+

3. What are Van Der Waals Forces?

  • any intermolecular force
  • electrostatic attraction between temporary dipoles and induced dipoles caused by movement of electrons in atoms and molecules.
  • shared pair of electrons
  • ionic attraction

4. How do the delocalised electrons in metallic bonding effect the melting point?

  • They make the bonding between atoms weaker
  • Because the shared pair of electrons create a strong intermolecular force
  • The more electrons there are, the stronger the bonding will be and the higher the meling point because the positive metal ions will have more electrons to be attracted to
  • They make the melting point lower because it stops the positive ions being attracted togther

5. What affects ionisation energy?

  • distance from the nucleus, shielding and intermolecular forces
  • nuclear charge, distance from nucleus and sheilding
  • the shape and size of an atom
  • only nuclear charge


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