Electronic Properties of Solids in OSH Training Program
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Questions and Answers

What is the name of the first unfilled energy band at T=0K?

  • Bandgap
  • Conduction band (correct)
  • Energy bandgap
  • Valence band
  • Which band is the last filled energy band at T=0K?

  • Valence band (correct)
  • Semiconductors
  • Conduction band
  • Energy bandgap
  • What happens to electrons in an insulator at ordinary temperatures?

  • They reach the conduction band easily
  • They move to the energy bandgap
  • They behave like conductors
  • They stay in the valence band (correct)
  • How can thermal energy bridge the energy bandgap in semiconductors?

    <p>By overcoming the energy barrier</p> Signup and view all the answers

    What type of materials have overlapping bands?

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

    Which type of impurity doping can increase conductivity in semiconductors?

    <p>P, B, As doping</p> Signup and view all the answers

    In which band do electrons pass to when the energy bandgap is small enough?

    <p>Conduction band</p> Signup and view all the answers

    What is the term for the first unfilled energy band at T=0K in a material?

    <p>Conduction band</p> Signup and view all the answers

    In elemental solids with covalent bonding, which band is the last filled energy band at T=0K?

    <p>Valence band</p> Signup and view all the answers

    What happens to electrons in an insulator regarding reaching the conduction band at ordinary temperatures?

    <p>Electrons cannot reach the conduction band</p> Signup and view all the answers

    What is the term for the energy bandgap that is small enough for some electrons to pass to the conduction band?

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

    Which process can increase conductivity in semiconductors by bridging the energy gap?

    <p>Impurity doping</p> Signup and view all the answers

    Why is the valence band called 'valence'?

    <p>Because it contains valence electrons responsible for bonding</p> Signup and view all the answers

    What is one characteristic of conductors regarding electron movement at ordinary temperatures?

    <p>Electrons move freely in the conduction band</p> Signup and view all the answers

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