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GIBILISCO CHAP 1

GIBILISCO CHAP 1
20問 • 2年前
  • Czy Gamat
    • 通報

    問題一覧

  • 1

    The atomic number of an element is determined by

    B. The number of protons.

  • 2

    2. The atomic weight of an element is approximately determined by:

    C. The number of neutrons plus the number of protons.

  • 3

    Suppose there is an atom of oxygen, containing eight protons and eight neutrons in the nucleus, and two neutrons are added to the nucleus. The resulting atomic weight is about:

    D. 18.

  • 4

    4. An ion:

    D. Might have either a positive or negative charge.

  • 5

    5. An isotope:

    D. Might have either a positive or negative charge.

  • 6

    A molecule:

    A. Might consist of just a single atom of an element.

  • 7

    In a compound:

    B. There must always be two or more elements.

  • 8

    An electrical insulator can be made a conductor:

    C. By ionizing.

  • 9

    Of the following substances, the worst conductor is:

    A. Air

  • 10

    Of the following substances, the best conductor is:

    B. Copper

  • 11

    Movement of holes in a semiconductor:

    C. Results in a certain amount of electric current.

  • 12

    If a material has low resistance:

    A. It is a good conductor.

  • 13

    A coulomb:

    D. Is an extremely large number of charge carriers.

  • 14

    A stroke of lightning:

    C. Is a discharge of static electricity

  • 15

    The volt is the standard unit of:

    C. Electromotive force.

  • 16

    If an EMF of one volt is placed across a resistance of two ohms, then the current is:

    A. Half an ampere.

  • 17

    A backwards-working electric motor is best described as:

    C. An electric generator.

  • 18

    In some batteries, chemical energy can be replenished by:

    B. Charging it

  • 19

    A changing magnetic field:

    C. Produces a fluctuating electric field.

  • 20

    Light is converted into electricity:

    D. In a photovoltaic cell.

    • ELEX Q AND A part 1

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    問題一覧

  • 1

    The atomic number of an element is determined by

    B. The number of protons.

  • 2

    2. The atomic weight of an element is approximately determined by:

    C. The number of neutrons plus the number of protons.

  • 3

    Suppose there is an atom of oxygen, containing eight protons and eight neutrons in the nucleus, and two neutrons are added to the nucleus. The resulting atomic weight is about:

    D. 18.

  • 4

    4. An ion:

    D. Might have either a positive or negative charge.

  • 5

    5. An isotope:

    D. Might have either a positive or negative charge.

  • 6

    A molecule:

    A. Might consist of just a single atom of an element.

  • 7

    In a compound:

    B. There must always be two or more elements.

  • 8

    An electrical insulator can be made a conductor:

    C. By ionizing.

  • 9

    Of the following substances, the worst conductor is:

    A. Air

  • 10

    Of the following substances, the best conductor is:

    B. Copper

  • 11

    Movement of holes in a semiconductor:

    C. Results in a certain amount of electric current.

  • 12

    If a material has low resistance:

    A. It is a good conductor.

  • 13

    A coulomb:

    D. Is an extremely large number of charge carriers.

  • 14

    A stroke of lightning:

    C. Is a discharge of static electricity

  • 15

    The volt is the standard unit of:

    C. Electromotive force.

  • 16

    If an EMF of one volt is placed across a resistance of two ohms, then the current is:

    A. Half an ampere.

  • 17

    A backwards-working electric motor is best described as:

    C. An electric generator.

  • 18

    In some batteries, chemical energy can be replenished by:

    B. Charging it

  • 19

    A changing magnetic field:

    C. Produces a fluctuating electric field.

  • 20

    Light is converted into electricity:

    D. In a photovoltaic cell.