002 conductors, semiconductors, and insulators

  1. Conductors, semiconductors, and insulators

    the ability of a material to conduct electricity is known as ____
    • electrical conductivity
    • conductance
  2. Conductors, semiconductors, and insulators

    electrical conductivity/ conductance in what unit of measurement?
    siemens per meter (S/m)
  3. Conductors, semiconductors, and insulators

    if a material has a high level of conductance it is classified as a 
    _____
    conductor
  4. Conductors, semiconductors, and insulators

    if a material has a low level of conductance it is classified as a 
    _____
    insulator
  5. Conductors, semiconductors, and insulators

    what are the three main factors that determine the conductance of an element?
    • electron configuration
    • electronegativity
    • ionization energy
  6. Electron Flow

    the uniform movoment of electrons in a specific direction thru a conductor is known as _____
    electric current
  7. Electron Flow

    current flows from _____ to _____
    negative to positive
  8. Electron Flow

    what causes free electrons?
    applied electrical force
  9. Electron Flow

    electrical flow occurs when a free electron leave on atom and goes to another
    T/F
    True
  10. Electron Flow

    what is an atom with more protons than electrons called?
    positive ion
  11. Electron Flow

    what does a positive ion seek to balance its self out?
    an electron
  12. Electron Flow

    what is an atom with more electrons than protons called?
    negative ion
  13. Electron Configuration 

    how are electron shells labelled?
    K,L,M,N,O,P,Q
  14. Electron Configuration 

    how many electrons can shell K hold?
    2
  15. Electron Configuration 

    how many electrons can shell L hold?
    8
  16. Electron Configuration 

    how many electrons can shell M hold?
    18
  17. Electron Configuration 

    all atoms must have full shells
    T/F
    False
  18. Electron Configuration 

    if a atom has 8 electrons in the valence shell, the atom is considered to be 
    Stable/Unstable
    stable
  19. Electron Configuration 

    T/F 
    the 2nd outermost shell is not a factor when determining conductance
    • False
    • good conductors will have this shell full
  20. Electron Configuration 

    which atoms have least chance of becoming free electrons
    A. atom with 2nd most outer shell full
    B. atom with 2nd most outer shell not full
    B. bec the electrons in the valence shell have more forces pulling it into the 2nd outer most shell, making it hard for the electrons to become free electrons
  21. Electronegativity and ionization energy

    what is electronegativity
    tendancy of an atom to attact electrons toward ifself

    Measured using the pauling scale 0.7- 3.98
  22. Electronegativity and ionization energy

    what happens when electronegativity is low?
    the atom would rather give off an electron than to keep it
  23. Electronegativity and ionization energy

    what happens when electronegativity is high
    the atom wants to gain an electron
  24. Electronegativity and ionization energy

    what is ionization energy
    the minimum amount of energy required to remove an electron from the valence shell

    Measured in electron volts (eV)
  25. Electronegativity and ionization energy

    T/F
    Higher values in Electronegativity and ionization makes for conductor
    • False
    • lower values in those to factors make for a better conductor
  26. Types Of Materials

    conductive materials allow ____ _____ to move thru it easily
    free electrons

    the more electrons that can move thru the material the better conductor it is
  27. Types Of Materials

    a Good conductor is a material that offers _____ ______ to electron movement
    small opposition 

    they have low ionization energy
  28. Types Of Materials

    not all metals are good conductors
    T/F
    false
  29. Types Of Materials

    what three metals are the best conductors?
    copper, gold, silver
  30. Types Of Materials

    why are copper, gold, and silver the best metal conductors?
    • bec they have full 2 outer most shell and one valence electron 
    • and have low electronegativity and ionization energy
  31. Types Of Materials

    a material with properties of both conductors and insulators is called a _____
    semiconductor
  32. Types Of Materials

    semiconductors act like an _____ but can conduct electricity if the electric force is strong enough to start the movement of free electrons
    insulator
  33. Types Of Materials

    a substance with few free electrons is known as ____
    insulator
  34. Types Of Materials

    Good insulators have a ____ valence shell, which leaves no free electrons to move fromm atom to atom
    full/complete
  35. Energy Band Gap

    "highway" used by free electrons to move from atom to atom
    conductance band
  36. Energy Band Gap

    where is the conductance band located
    just above the valence shell
  37. Energy Band Gap

    is what materials do the valence shell and the conductance band overlap?
    conductor
  38. Energy Band Gap

    a small gap between the valence shell and the conductance band is found is waht kind of material
    semiconductor
  39. Energy Band Gap

    a large gap between the conductance band and the valence shell is found in what kind of material
    insulator
  40. Energy Band Gap

    T/F
    you need more energy to move free electrons thru a overlapped conductance band and valence shell?
    False

    overlapped conductance band and valence shell is considered a conductor and onyl requires a little energy to pass free electrons
Author
daniel.ramos702
ID
351973
Card Set
002 conductors, semiconductors, and insulators
Description
002 conductors, semiconductors, and insulators
Updated