Chemistry

10th -

12thgrade

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Chemistry Review Homework

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20 questions

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  • 1. Multiple Choice
    1 minute
    1 pt

    The three nuclides, U-233, U-235, and U-238, are isotopes of uranium because they have the same number of protons per atom and

    the same number of electrons per atom

    the same number of neutrons per atom

    a different number of electrons per atom

    a different number of neutrons per atom

  • 2. Multiple Choice
    1 minute
    1 pt
    Image

    Which numerical setup can be used to calculate the atomic mass of gallium?

    (0.6011)(68.926 u) + (0.3989)(70.925 u)

    (60.11)(68.926 u) + (39.89)(70.925 u)

    (0.6011)(70.925 u) + (0.3989)(68.926 u)

    (60.11)(70.925 u) + (39.89)(68.926 u)

  • 3. Multiple Choice
    1 minute
    1 pt

    Which list of elements is arranged in order of increasing electronegativity?

    Be, Mg, Ca

    F, Cl, Br

    K, Ca, Sc

    Li, Na, K

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