Physical Science Chapter 21

19 Questions  I  By Julierass311
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Physical Science Quizzes & Trivia
Physical. Science.

  
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Questions and Answers

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  • 1. 
    Light can only be seen through very thin metal. 
    • A. 

      True

    • B. 

      False


  • 2. 
    Generally, MOs are low in energy because their electrons will be found between two nuclei.
    • A. 

      True

    • B. 

      False


  • 3. 
    Compositions of alloys are generally fixed in simple rations. 
    • A. 

      True

    • B. 

      False


  • 4. 
    For an alloy to form, the atoms must be different sizes. 
    • A. 

      True

    • B. 

      False


  • 5. 
    Often alloys are better conductors than either of the metals, in their pure form, that make up an alloy. 
    • A. 

      True

    • B. 

      False


  • 6. 
    Semi-metals are electrically conductive and have high melting points. 
    • A. 

      True

    • B. 

      False


  • 7. 
    Semi- conductors and metals are very similar in the way each forms alloys. 
    • A. 

      True

    • B. 

      False


  • 8. 
    Metal-metal compound

  • 9. 
    Electrons act like a lubricant between layers of nuclei

  • 10. 
    Movement of electrons 

  • 11. 
    An electron which is not focused around any one nucleus

  • 12. 
    Property of obsorbing photons throughout the electromagnetic spectrum. 

  • 13. 
    Substances that conduct electricity better than insulators but not as good as conductors. 

  • 14. 
    The degree to which a substance conducts heat. 

  • 15. 
    A measure for current flowing through a semiconductor 

  • 16. 
    Neclei surrounded by a sea of electrons 

  • 17. 
    How easily light bounces off a surface of a substance

  • 18. 
    Why are alloys not useful to us today?
    • A. 

      Have lower melting temperatures

    • B. 

      Have a higher conductivity rate

    • C. 

      Are less malleable

    • D. 

      Reduce weight in objects


  • 19. 
    How do metals and semiconductors change with increasing temperature?
    • A. 

      Metals become less resistive and semiconductors more resistive

    • B. 

      Metals and semiconductors become less resistive


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